./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl --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 8967c0a6dd6f26859048ef07f7346401bdb19327ee452e685df9b5c4b7492d34 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:27:35,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:27:35,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:27:35,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:27:35,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:27:35,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:27:35,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:27:35,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:27:35,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:27:35,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:27:35,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:27:35,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:27:35,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:27:35,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:27:35,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:27:35,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:27:35,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:27:35,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:27:35,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:27:35,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:27:35,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:27:35,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:27:35,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:27:35,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:27:35,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:27:35,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:27:35,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:27:35,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:27:35,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:27:35,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:27:35,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:27:35,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:27:35,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:27:35,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:27:35,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:27:35,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:27:35,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:27:35,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:27:35,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:27:35,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:27:35,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:27:35,276 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:27:35,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:27:35,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:27:35,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:27:35,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:27:35,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:27:35,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:27:35,335 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:27:35,335 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:27:35,336 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:27:35,336 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:27:35,337 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:27:35,338 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:27:35,338 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:27:35,338 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:27:35,339 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:27:35,339 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:27:35,339 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:27:35,340 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:27:35,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:27:35,341 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:27:35,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:27:35,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:27:35,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:27:35,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:27:35,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:27:35,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:27:35,344 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:27:35,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:27:35,345 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:27:35,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:27:35,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:27:35,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:27:35,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:27:35,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:27:35,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:27:35,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:27:35,348 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:27:35,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:27:35,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:27:35,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:27:35,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:27:35,350 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_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8967c0a6dd6f26859048ef07f7346401bdb19327ee452e685df9b5c4b7492d34 [2021-11-23 17:27:35,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:27:35,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:27:35,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:27:35,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:27:35,778 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:27:35,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c [2021-11-23 17:27:35,855 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/data/3f6e28379/17921479e2e347089512ea03b07506b9/FLAG887f8288f [2021-11-23 17:27:36,539 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:27:36,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c [2021-11-23 17:27:36,555 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/data/3f6e28379/17921479e2e347089512ea03b07506b9/FLAG887f8288f [2021-11-23 17:27:36,898 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/data/3f6e28379/17921479e2e347089512ea03b07506b9 [2021-11-23 17:27:36,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:27:36,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:27:36,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:27:36,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:27:36,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:27:36,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:27:36" (1/1) ... [2021-11-23 17:27:36,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61fe48e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:36, skipping insertion in model container [2021-11-23 17:27:36,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:27:36" (1/1) ... [2021-11-23 17:27:36,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:27:36,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:27:37,149 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c[617,630] [2021-11-23 17:27:37,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:27:37,179 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:27:37,193 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c[617,630] [2021-11-23 17:27:37,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:27:37,215 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:27:37,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37 WrapperNode [2021-11-23 17:27:37,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:27:37,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:27:37,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:27:37,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:27:37,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37" (1/1) ... [2021-11-23 17:27:37,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37" (1/1) ... [2021-11-23 17:27:37,273 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 47 [2021-11-23 17:27:37,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:27:37,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:27:37,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:27:37,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:27:37,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37" (1/1) ... [2021-11-23 17:27:37,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37" (1/1) ... [2021-11-23 17:27:37,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37" (1/1) ... [2021-11-23 17:27:37,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37" (1/1) ... [2021-11-23 17:27:37,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37" (1/1) ... [2021-11-23 17:27:37,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37" (1/1) ... [2021-11-23 17:27:37,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37" (1/1) ... [2021-11-23 17:27:37,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:27:37,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:27:37,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:27:37,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:27:37,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:37" (1/1) ... [2021-11-23 17:27:37,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:27:37,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:37,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:27:37,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:27:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:27:37,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:27:37,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:27:37,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:27:37,499 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:27:37,502 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:27:37,626 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:27:37,675 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:27:37,680 INFO L158 Benchmark]: Toolchain (without parser) took 775.31ms. Allocated memory is still 100.7MB. Free memory was 68.6MB in the beginning and 63.7MB in the end (delta: 4.8MB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. [2021-11-23 17:27:37,680 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 100.7MB. Free memory is still 53.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:27:37,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 311.62ms. Allocated memory is still 100.7MB. Free memory was 68.3MB in the beginning and 75.6MB in the end (delta: -7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:27:37,684 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.59ms. Allocated memory is still 100.7MB. Free memory was 75.6MB in the beginning and 73.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:27:37,685 INFO L158 Benchmark]: Boogie Preprocessor took 51.90ms. Allocated memory is still 100.7MB. Free memory was 73.9MB in the beginning and 73.1MB in the end (delta: 743.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:27:37,686 INFO L158 Benchmark]: RCFGBuilder took 349.35ms. Allocated memory is still 100.7MB. Free memory was 72.8MB in the beginning and 63.7MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:27:37,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 100.7MB. Free memory is still 53.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 311.62ms. Allocated memory is still 100.7MB. Free memory was 68.3MB in the beginning and 75.6MB in the end (delta: -7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.59ms. Allocated memory is still 100.7MB. Free memory was 75.6MB in the beginning and 73.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.90ms. Allocated memory is still 100.7MB. Free memory was 73.9MB in the beginning and 73.1MB in the end (delta: 743.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 349.35ms. Allocated memory is still 100.7MB. Free memory was 72.8MB in the beginning and 63.7MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:27:37,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl --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 8967c0a6dd6f26859048ef07f7346401bdb19327ee452e685df9b5c4b7492d34 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:27:40,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:27:40,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:27:40,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:27:40,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:27:40,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:27:40,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:27:40,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:27:40,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:27:40,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:27:40,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:27:40,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:27:40,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:27:40,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:27:40,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:27:40,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:27:40,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:27:40,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:27:41,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:27:41,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:27:41,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:27:41,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:27:41,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:27:41,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:27:41,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:27:41,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:27:41,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:27:41,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:27:41,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:27:41,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:27:41,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:27:41,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:27:41,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:27:41,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:27:41,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:27:41,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:27:41,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:27:41,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:27:41,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:27:41,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:27:41,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:27:41,048 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:27:41,107 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:27:41,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:27:41,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:27:41,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:27:41,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:27:41,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:27:41,112 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:27:41,112 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:27:41,113 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:27:41,113 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:27:41,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:27:41,115 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:27:41,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:27:41,118 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:27:41,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:27:41,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:27:41,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:27:41,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:27:41,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:27:41,119 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:27:41,119 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:27:41,120 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:27:41,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:27:41,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:27:41,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:27:41,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:27:41,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:27:41,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:27:41,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:27:41,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:27:41,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:27:41,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:27:41,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:27:41,124 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:27:41,124 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:41,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:27:41,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:27:41,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:27:41,126 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8967c0a6dd6f26859048ef07f7346401bdb19327ee452e685df9b5c4b7492d34 [2021-11-23 17:27:41,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:27:41,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:27:41,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:27:41,662 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:27:41,662 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:27:41,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c [2021-11-23 17:27:41,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/data/b1da203be/37594afc9e86490681309afc55194c65/FLAG6b0807032 [2021-11-23 17:27:42,313 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:27:42,314 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c [2021-11-23 17:27:42,322 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/data/b1da203be/37594afc9e86490681309afc55194c65/FLAG6b0807032 [2021-11-23 17:27:42,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/data/b1da203be/37594afc9e86490681309afc55194c65 [2021-11-23 17:27:42,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:27:42,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:27:42,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:27:42,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:27:42,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:27:42,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:27:42" (1/1) ... [2021-11-23 17:27:42,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424fe2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:42, skipping insertion in model container [2021-11-23 17:27:42,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:27:42" (1/1) ... [2021-11-23 17:27:42,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:27:42,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:27:43,017 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c[617,630] [2021-11-23 17:27:43,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:27:43,063 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:27:43,086 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c[617,630] [2021-11-23 17:27:43,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:27:43,155 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:27:43,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43 WrapperNode [2021-11-23 17:27:43,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:27:43,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:27:43,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:27:43,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:27:43,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (1/1) ... [2021-11-23 17:27:43,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (1/1) ... [2021-11-23 17:27:43,238 INFO L137 Inliner]: procedures = 17, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 47 [2021-11-23 17:27:43,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:27:43,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:27:43,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:27:43,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:27:43,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (1/1) ... [2021-11-23 17:27:43,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (1/1) ... [2021-11-23 17:27:43,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (1/1) ... [2021-11-23 17:27:43,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (1/1) ... [2021-11-23 17:27:43,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (1/1) ... [2021-11-23 17:27:43,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (1/1) ... [2021-11-23 17:27:43,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (1/1) ... [2021-11-23 17:27:43,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:27:43,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:27:43,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:27:43,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:27:43,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (1/1) ... [2021-11-23 17:27:43,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:27:43,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:43,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:27:43,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:27:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:27:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:27:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:27:43,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:27:43,502 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:27:43,504 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:27:44,552 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:27:44,558 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:27:44,558 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:27:44,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:27:44 BoogieIcfgContainer [2021-11-23 17:27:44,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:27:44,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:27:44,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:27:44,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:27:44,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:27:42" (1/3) ... [2021-11-23 17:27:44,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747f4ab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:27:44, skipping insertion in model container [2021-11-23 17:27:44,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:27:43" (2/3) ... [2021-11-23 17:27:44,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747f4ab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:27:44, skipping insertion in model container [2021-11-23 17:27:44,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:27:44" (3/3) ... [2021-11-23 17:27:44,571 INFO L111 eAbstractionObserver]: Analyzing ICFG divmul_buf_diverge.c [2021-11-23 17:27:44,577 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:27:44,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:27:44,654 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:27:44,671 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 [2021-11-23 17:27:44,671 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:27:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:27:44,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:44,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:27:44,709 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash 889620925, now seen corresponding path program 1 times [2021-11-23 17:27:44,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:44,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782344597] [2021-11-23 17:27:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:44,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:44,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:44,727 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:44,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:27:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:44,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:27:44,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:44,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:44,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:44,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782344597] [2021-11-23 17:27:44,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782344597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:44,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:44,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:27:44,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693348224] [2021-11-23 17:27:44,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:44,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:44,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:44,957 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-23 17:27:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:44,995 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-23 17:27:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:44,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-11-23 17:27:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:45,008 INFO L225 Difference]: With dead ends: 39 [2021-11-23 17:27:45,009 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 17:27:45,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:45,017 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:45,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:27:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 17:27:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-11-23 17:27:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2021-11-23 17:27:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-23 17:27:45,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2021-11-23 17:27:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:45,059 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-23 17:27:45,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-23 17:27:45,060 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-23 17:27:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:27:45,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:45,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:45,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:45,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:45,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash -875759451, now seen corresponding path program 1 times [2021-11-23 17:27:45,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:45,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261909132] [2021-11-23 17:27:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:45,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:45,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:45,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:45,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:27:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:45,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:45,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:45,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:45,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:45,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261909132] [2021-11-23 17:27:45,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261909132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:45,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1796110770] [2021-11-23 17:27:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:45,838 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:45,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:45,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:45,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 17:27:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:46,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:46,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:46,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1796110770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:46,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602559532] [2021-11-23 17:27:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:46,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:46,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:46,464 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:46,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 17:27:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:46,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:27:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:46,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:46,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602559532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:46,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:46,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 17:27:46,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354740637] [2021-11-23 17:27:46,846 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:46,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:27:46,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:46,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:27:46,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:27:46,849 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-11-23 17:27:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:46,971 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-11-23 17:27:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:27:46,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 11 [2021-11-23 17:27:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:46,976 INFO L225 Difference]: With dead ends: 39 [2021-11-23 17:27:46,976 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 17:27:46,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:27:46,980 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:46,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 44 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:27:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 17:27:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 17:27:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 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) [2021-11-23 17:27:47,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-23 17:27:47,004 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 11 [2021-11-23 17:27:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:47,004 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-23 17:27:47,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-11-23 17:27:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-23 17:27:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 17:27:47,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:47,012 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:47,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:47,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:47,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:47,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:47,617 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:47,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1424528451, now seen corresponding path program 2 times [2021-11-23 17:27:47,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:47,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555838022] [2021-11-23 17:27:47,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:27:47,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:47,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:47,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:47,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:27:48,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:27:48,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:48,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:27:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:27:49,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:05,771 WARN L227 SmtUtils]: Spent 7.54s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:28:27,717 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 31.0 10.0)))) (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2) .cse2))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1000.0))) (and (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)))) is different from true [2021-11-23 17:29:07,793 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 31.0 10.0)))) (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~buf~0#1| .cse2) .cse2) .cse2))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1000.0))) (and (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)))) is different from false [2021-11-23 17:29:09,855 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 31.0 10.0)))) (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~buf~0#1| .cse2) .cse2) .cse2))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1000.0))) (and (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)))) is different from true [2021-11-23 17:29:54,279 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 31.0 10.0)))) (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2) .cse2) .cse2) .cse2))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1000.0))) (and (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)))) is different from false [2021-11-23 17:29:56,355 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 31.0 10.0)))) (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2) .cse2) .cse2) .cse2))) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1000.0))) (and (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)))) is different from true [2021-11-23 17:30:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 31 not checked. [2021-11-23 17:30:11,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:11,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555838022] [2021-11-23 17:30:11,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555838022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:11,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [842177940] [2021-11-23 17:30:11,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:30:11,931 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:11,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:30:11,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:30:11,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:30:13,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:30:13,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:30:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:30:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:19,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:24,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [842177940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:24,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473848388] [2021-11-23 17:30:24,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:30:24,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:30:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:30:24,979 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:30:24,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:30:25,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:30:25,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:30:25,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:30:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:25,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:26,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473848388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:26,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:30:26,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7, 7, 7, 7] total 22 [2021-11-23 17:30:26,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036587558] [2021-11-23 17:30:26,034 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:30:26,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 17:30:26,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 17:30:26,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=278, Unknown=5, NotChecked=108, Total=462 [2021-11-23 17:30:26,041 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 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) [2021-11-23 17:30:29,176 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 31.0 10.0)))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (.cse2 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse1) .cse1) .cse1) .cse1)) (.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1000.0))) (and (= |c_ULTIMATE.start_main_~i~0#1| (_ bv0 32)) (= |c_ULTIMATE.start_main_~buf~0#1| (fp.mul c_currentRoundingMode .cse0 .cse1)) (= .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.leq .cse2 .cse3) (= c_currentRoundingMode roundNearestTiesToEven) (fp.geq .cse2 (fp.neg .cse3))))) is different from true [2021-11-23 17:30:31,251 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 31.0 10.0)))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (.cse2 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~buf~0#1| .cse1) .cse1) .cse1)) (.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1000.0))) (and (= |c_ULTIMATE.start_main_~i~0#1| (_ bv0 32)) (= |c_ULTIMATE.start_main_~buf~0#1| (fp.mul c_currentRoundingMode .cse0 .cse1)) (= .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.leq .cse2 .cse3) (fp.geq .cse2 (fp.neg .cse3)) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-23 17:30:34,224 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 31.0 10.0)))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (.cse2 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~buf~0#1| .cse1) .cse1) .cse1)) (.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1000.0))) (and (= |c_ULTIMATE.start_main_~i~0#1| (_ bv1 32)) (= |c_ULTIMATE.start_main_~buf~0#1| (fp.mul c_currentRoundingMode .cse0 .cse1)) (= .cse0 |c_ULTIMATE.start_main_~x~0#1|) (fp.leq .cse2 .cse3) (fp.geq .cse2 (fp.neg .cse3)) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-23 17:30:42,356 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode (/ 31.0 10.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse3) .cse3)) (.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1000.0)) (.cse2 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (and (fp.leq .cse0 .cse1) (= |c_ULTIMATE.start_main_~buf~0#1| (fp.mul c_currentRoundingMode .cse2 .cse3)) (fp.geq .cse0 (fp.neg .cse1)) (= .cse2 |c_ULTIMATE.start_main_~x~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| (_ bv3 32)) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-23 17:30:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:45,253 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2021-11-23 17:30:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 17:30:45,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 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 26 [2021-11-23 17:30:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:45,257 INFO L225 Difference]: With dead ends: 85 [2021-11-23 17:30:45,257 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 17:30:45,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 54.3s TimeCoverageRelationStatistics Valid=286, Invalid=789, Unknown=9, NotChecked=476, Total=1560 [2021-11-23 17:30:45,260 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:45,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 114 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 77 Unchecked, 2.7s Time] [2021-11-23 17:30:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 17:30:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2021-11-23 17:30:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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) [2021-11-23 17:30:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-23 17:30:45,274 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 26 [2021-11-23 17:30:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:45,275 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-23 17:30:45,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 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) [2021-11-23 17:30:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-23 17:30:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 17:30:45,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:45,277 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:30:45,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:45,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:45,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:45,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:30:45,884 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:45,884 INFO L85 PathProgramCache]: Analyzing trace with hash 240020196, now seen corresponding path program 1 times [2021-11-23 17:30:45,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:45,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160722390] [2021-11-23 17:30:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:45,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:45,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:45,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:45,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:30:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:30:46,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:47,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:47,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160722390] [2021-11-23 17:30:47,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160722390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1522314175] [2021-11-23 17:30:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:47,773 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:30:47,783 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:30:47,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:30:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:49,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:30:49,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:49,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:49,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1522314175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:49,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242640033] [2021-11-23 17:30:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:49,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:30:49,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:30:49,728 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:30:49,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:30:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:50,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:30:50,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:50,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:50,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242640033] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:50,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:30:50,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-23 17:30:50,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578075965] [2021-11-23 17:30:50,816 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:30:50,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:30:50,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:30:50,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:30:50,818 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:51,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:51,403 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2021-11-23 17:30:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:30:51,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 17:30:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:51,409 INFO L225 Difference]: With dead ends: 130 [2021-11-23 17:30:51,409 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 17:30:51,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:30:51,411 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 113 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:51,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 216 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:30:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 17:30:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2021-11-23 17:30:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.165289256198347) internal successors, (141), 121 states have internal predecessors, (141), 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) [2021-11-23 17:30:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2021-11-23 17:30:51,432 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 28 [2021-11-23 17:30:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:51,433 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2021-11-23 17:30:51,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2021-11-23 17:30:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 17:30:51,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:51,437 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:30:51,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:51,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:51,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:52,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:52,047 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:30:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:52,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1333632484, now seen corresponding path program 2 times [2021-11-23 17:30:52,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:52,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594456897] [2021-11-23 17:30:52,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:30:52,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:52,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:52,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:52,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:30:54,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:30:54,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:30:54,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:30:54,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:55,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:57,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:57,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594456897] [2021-11-23 17:30:57,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594456897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:57,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135615810] [2021-11-23 17:30:57,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:30:57,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:57,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:30:57,521 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:30:57,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:31:01,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:31:01,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:01,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:31:01,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:01,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:02,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135615810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:02,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235700764] [2021-11-23 17:31:02,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:31:02,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:02,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:02,036 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:02,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:31:03,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:31:03,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:03,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:31:03,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:03,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:04,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235700764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:04,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:31:04,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2021-11-23 17:31:04,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251701251] [2021-11-23 17:31:04,451 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:31:04,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 17:31:04,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:04,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 17:31:04,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:31:04,454 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 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) [2021-11-23 17:31:07,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:07,184 INFO L93 Difference]: Finished difference Result 274 states and 328 transitions. [2021-11-23 17:31:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:31:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 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 58 [2021-11-23 17:31:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:07,195 INFO L225 Difference]: With dead ends: 274 [2021-11-23 17:31:07,195 INFO L226 Difference]: Without dead ends: 270 [2021-11-23 17:31:07,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:31:07,198 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 544 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:07,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 840 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 17:31:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-23 17:31:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2021-11-23 17:31:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.1660377358490566) internal successors, (309), 265 states have internal predecessors, (309), 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) [2021-11-23 17:31:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 309 transitions. [2021-11-23 17:31:07,250 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 309 transitions. Word has length 58 [2021-11-23 17:31:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:07,250 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 309 transitions. [2021-11-23 17:31:07,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 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) [2021-11-23 17:31:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 309 transitions. [2021-11-23 17:31:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:31:07,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:07,266 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:07,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:07,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:07,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:07,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:07,891 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:07,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1678097436, now seen corresponding path program 3 times [2021-11-23 17:31:07,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:07,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602257955] [2021-11-23 17:31:07,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:31:07,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:07,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:07,894 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:07,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:31:08,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 17:31:08,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:08,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:31:08,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2021-11-23 17:32:54,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:54,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602257955] [2021-11-23 17:32:54,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602257955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:54,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:54,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:32:54,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812146019] [2021-11-23 17:32:54,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:54,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:32:54,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:54,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:32:54,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=36, Unknown=3, NotChecked=0, Total=56 [2021-11-23 17:32:54,338 INFO L87 Difference]: Start difference. First operand 266 states and 309 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-11-23 17:33:00,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:01,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:03,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:07,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:08,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:10,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:12,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:16,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:16,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:16,760 INFO L93 Difference]: Finished difference Result 394 states and 457 transitions. [2021-11-23 17:33:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:33:16,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-23 17:33:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:16,805 INFO L225 Difference]: With dead ends: 394 [2021-11-23 17:33:16,806 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 17:33:16,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=41, Invalid=84, Unknown=7, NotChecked=0, Total=132 [2021-11-23 17:33:16,808 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:16,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 51 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 4 Unknown, 29 Unchecked, 13.8s Time] [2021-11-23 17:33:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 17:33:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 259. [2021-11-23 17:33:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.1666666666666667) internal successors, (301), 258 states have internal predecessors, (301), 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) [2021-11-23 17:33:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 301 transitions. [2021-11-23 17:33:16,840 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 301 transitions. Word has length 118 [2021-11-23 17:33:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:16,840 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 301 transitions. [2021-11-23 17:33:16,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2021-11-23 17:33:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 301 transitions. [2021-11-23 17:33:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:33:16,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:16,845 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:33:16,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:17,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:33:17,059 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:33:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:17,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1047511030, now seen corresponding path program 4 times [2021-11-23 17:33:17,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:17,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593071810] [2021-11-23 17:33:17,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:33:17,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:17,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:17,069 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:17,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:33:22,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:33:22,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:33:22,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:33:22,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:25,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:29,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:29,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593071810] [2021-11-23 17:33:29,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593071810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [363234807] [2021-11-23 17:33:29,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:33:29,991 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:29,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:33:29,995 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:33:29,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:33:37,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:33:37,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:33:37,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:33:37,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:38,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:39,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [363234807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:39,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316717736] [2021-11-23 17:33:39,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:33:39,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:33:39,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:33:39,393 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:33:39,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:33:42,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:33:42,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:33:42,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:33:42,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:43,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:44,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316717736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:44,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:33:44,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 25, 25] total 48 [2021-11-23 17:33:44,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447030173] [2021-11-23 17:33:44,567 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:33:44,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 17:33:44,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:33:44,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 17:33:44,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 17:33:44,571 INFO L87 Difference]: Start difference. First operand 259 states and 301 transitions. Second operand has 48 states, 48 states have (on average 4.833333333333333) internal successors, (232), 48 states have internal predecessors, (232), 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) [2021-11-23 17:34:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:02,033 INFO L93 Difference]: Finished difference Result 662 states and 776 transitions. [2021-11-23 17:34:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 17:34:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.833333333333333) internal successors, (232), 48 states have internal predecessors, (232), 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 118 [2021-11-23 17:34:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:02,040 INFO L225 Difference]: With dead ends: 662 [2021-11-23 17:34:02,040 INFO L226 Difference]: Without dead ends: 658 [2021-11-23 17:34:02,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2021-11-23 17:34:02,044 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 1776 mSDsluCounter, 3268 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:02,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1776 Valid, 3412 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 17:34:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-11-23 17:34:02,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 547. [2021-11-23 17:34:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.1666666666666667) internal successors, (637), 546 states have internal predecessors, (637), 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) [2021-11-23 17:34:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 637 transitions. [2021-11-23 17:34:02,089 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 637 transitions. Word has length 118 [2021-11-23 17:34:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:02,090 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 637 transitions. [2021-11-23 17:34:02,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.833333333333333) internal successors, (232), 48 states have internal predecessors, (232), 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) [2021-11-23 17:34:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 637 transitions. [2021-11-23 17:34:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-23 17:34:02,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:02,098 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:02,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-23 17:34:02,516 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forcibly destroying the process [2021-11-23 17:34:02,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:02,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-23 17:34:02,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:02,737 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:02,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash -853406730, now seen corresponding path program 5 times [2021-11-23 17:34:02,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:02,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185337676] [2021-11-23 17:34:02,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:34:02,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:02,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:02,741 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:02,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:34:31,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-23 17:34:31,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 17:34:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:40,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:04,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:04,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185337676] [2021-11-23 17:35:04,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185337676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:04,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [198772785] [2021-11-23 17:35:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:35:04,395 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:04,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:04,421 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:04,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:37:39,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-23 17:37:39,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:37:39,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:41,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:13,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [198772785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:13,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693415921] [2021-11-23 17:38:13,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:38:13,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:13,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:13,719 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:13,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f55589a-bc36-4ba4-a3b6-246868babcd4/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process