./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF --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 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:29:16,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:29:16,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:29:16,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:29:16,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:29:16,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:29:16,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:29:16,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:29:16,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:29:16,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:29:16,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:29:16,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:29:16,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:29:16,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:29:16,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:29:16,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:29:16,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:29:16,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:29:16,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:29:16,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:29:16,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:29:16,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:29:16,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:29:16,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:29:16,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:29:16,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:29:16,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:29:16,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:29:16,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:29:16,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:29:16,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:29:16,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:29:16,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:29:16,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:29:16,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:29:16,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:29:16,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:29:16,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:29:16,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:29:16,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:29:16,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:29:16,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:29:16,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:29:16,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:29:16,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:29:16,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:29:16,364 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:29:16,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:29:16,364 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:29:16,365 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:29:16,372 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:29:16,372 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:29:16,373 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:29:16,374 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:29:16,374 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:29:16,374 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:29:16,374 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:29:16,375 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:29:16,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:29:16,376 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:29:16,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:29:16,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:29:16,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:29:16,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:29:16,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:29:16,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:29:16,378 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:29:16,378 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:29:16,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:29:16,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:29:16,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:29:16,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:29:16,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:29:16,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:16,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:29:16,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:29:16,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:29:16,382 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:29:16,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:29:16,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:29:16,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:29:16,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:29:16,383 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_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 [2021-11-12 22:29:16,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:29:16,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:29:16,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:29:16,753 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:29:16,754 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:29:16,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-11-12 22:29:16,847 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/data/7e1605456/fd4798100ca74ef4aad18062000793aa/FLAGc5708f313 [2021-11-12 22:29:17,401 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:29:17,402 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-11-12 22:29:17,412 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/data/7e1605456/fd4798100ca74ef4aad18062000793aa/FLAGc5708f313 [2021-11-12 22:29:17,742 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/data/7e1605456/fd4798100ca74ef4aad18062000793aa [2021-11-12 22:29:17,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:29:17,746 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:29:17,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:17,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:29:17,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:29:17,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:17" (1/1) ... [2021-11-12 22:29:17,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36725a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:17, skipping insertion in model container [2021-11-12 22:29:17,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:17" (1/1) ... [2021-11-12 22:29:17,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:29:17,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:18,034 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2021-11-12 22:29:18,039 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2021-11-12 22:29:18,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:18,098 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:29:18,115 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2021-11-12 22:29:18,117 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2021-11-12 22:29:18,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:18,177 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:29:18,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18 WrapperNode [2021-11-12 22:29:18,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:18,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:18,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:29:18,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:29:18,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (1/1) ... [2021-11-12 22:29:18,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (1/1) ... [2021-11-12 22:29:18,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:18,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:29:18,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:29:18,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:29:18,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (1/1) ... [2021-11-12 22:29:18,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (1/1) ... [2021-11-12 22:29:18,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (1/1) ... [2021-11-12 22:29:18,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (1/1) ... [2021-11-12 22:29:18,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (1/1) ... [2021-11-12 22:29:18,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (1/1) ... [2021-11-12 22:29:18,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (1/1) ... [2021-11-12 22:29:18,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:29:18,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:29:18,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:29:18,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:29:18,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (1/1) ... [2021-11-12 22:29:18,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:18,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:18,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:29:18,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:29:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:29:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-12 22:29:18,386 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-12 22:29:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:29:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:29:18,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:29:18,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:29:18,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:29:18,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:29:18,975 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:29:18,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:18 BoogieIcfgContainer [2021-11-12 22:29:18,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:29:18,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:29:18,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:29:18,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:29:18,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:29:17" (1/3) ... [2021-11-12 22:29:18,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f85bd6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:18, skipping insertion in model container [2021-11-12 22:29:18,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:18" (2/3) ... [2021-11-12 22:29:18,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f85bd6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:18, skipping insertion in model container [2021-11-12 22:29:18,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:18" (3/3) ... [2021-11-12 22:29:18,988 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-3a.c.cil.c [2021-11-12 22:29:18,994 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:29:18,994 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 22:29:19,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:29:19,048 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 [2021-11-12 22:29:19,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 22:29:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 43 states have internal predecessors, (60), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 22:29:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 22:29:19,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:19,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 22:29:19,074 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash 9697065, now seen corresponding path program 1 times [2021-11-12 22:29:19,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:29:19,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066282714] [2021-11-12 22:29:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:19,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:29:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:29:19,196 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 22:29:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:29:19,235 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 22:29:19,237 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 22:29:19,239 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-12 22:29:19,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-12 22:29:19,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:29:19,246 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-12 22:29:19,249 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:29:19,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:29:19 BoogieIcfgContainer [2021-11-12 22:29:19,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:29:19,276 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:29:19,276 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:29:19,277 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:29:19,277 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:18" (3/4) ... [2021-11-12 22:29:19,281 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 22:29:19,282 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:29:19,284 INFO L158 Benchmark]: Toolchain (without parser) took 1537.42ms. Allocated memory is still 115.3MB. Free memory was 73.8MB in the beginning and 43.9MB in the end (delta: 29.9MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. [2021-11-12 22:29:19,286 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 115.3MB. Free memory was 91.5MB in the beginning and 91.5MB in the end (delta: 35.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:29:19,287 INFO L158 Benchmark]: CACSL2BoogieTranslator took 429.34ms. Allocated memory is still 115.3MB. Free memory was 73.5MB in the beginning and 83.8MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:29:19,290 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.16ms. Allocated memory is still 115.3MB. Free memory was 83.8MB in the beginning and 81.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:29:19,296 INFO L158 Benchmark]: Boogie Preprocessor took 49.57ms. Allocated memory is still 115.3MB. Free memory was 81.7MB in the beginning and 80.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:29:19,298 INFO L158 Benchmark]: RCFGBuilder took 682.06ms. Allocated memory is still 115.3MB. Free memory was 80.3MB in the beginning and 57.9MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-12 22:29:19,299 INFO L158 Benchmark]: TraceAbstraction took 292.08ms. Allocated memory is still 115.3MB. Free memory was 57.6MB in the beginning and 44.2MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:29:19,300 INFO L158 Benchmark]: Witness Printer took 6.31ms. Allocated memory is still 115.3MB. Free memory was 44.2MB in the beginning and 43.9MB in the end (delta: 350.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:29:19,311 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 115.3MB. Free memory was 91.5MB in the beginning and 91.5MB in the end (delta: 35.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 429.34ms. Allocated memory is still 115.3MB. Free memory was 73.5MB in the beginning and 83.8MB in the end (delta: -10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.16ms. Allocated memory is still 115.3MB. Free memory was 83.8MB in the beginning and 81.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.57ms. Allocated memory is still 115.3MB. Free memory was 81.7MB in the beginning and 80.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 682.06ms. Allocated memory is still 115.3MB. Free memory was 80.3MB in the beginning and 57.9MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 292.08ms. Allocated memory is still 115.3MB. Free memory was 57.6MB in the beginning and 44.2MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 6.31ms. Allocated memory is still 115.3MB. Free memory was 44.2MB in the beginning and 43.9MB in the end (delta: 350.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L402] COND TRUE __VERIFIER_nondet_int() [L403] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 22:29:19,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/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_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF --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 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:29:21,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:29:21,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:29:21,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:29:21,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:29:21,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:29:21,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:29:21,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:29:21,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:29:21,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:29:21,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:29:21,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:29:21,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:29:21,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:29:21,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:29:21,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:29:21,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:29:21,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:29:21,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:29:21,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:29:21,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:29:21,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:29:21,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:29:21,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:29:21,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:29:21,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:29:21,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:29:21,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:29:21,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:29:21,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:29:22,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:29:22,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:29:22,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:29:22,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:29:22,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:29:22,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:29:22,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:29:22,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:29:22,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:29:22,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:29:22,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:29:22,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:29:22,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:29:22,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:29:22,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:29:22,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:29:22,067 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:29:22,068 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:29:22,068 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:29:22,068 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:29:22,068 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:29:22,069 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:29:22,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:29:22,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:29:22,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:29:22,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:29:22,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:29:22,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:29:22,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:29:22,073 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:29:22,073 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:29:22,074 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:29:22,074 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:29:22,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:29:22,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:29:22,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:29:22,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:29:22,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:29:22,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:29:22,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:22,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:29:22,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:29:22,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:29:22,077 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:29:22,077 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:22,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:29:22,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:29:22,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:29:22,079 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_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13801fa2c96f7c93ace2086dcc65f456b83ac056f84901412492a5919d95dd03 [2021-11-12 22:29:22,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:29:22,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:29:22,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:29:22,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:29:22,605 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:29:22,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-11-12 22:29:22,694 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/data/0ffd2b6e0/59d418af8b7949868882cf76b3f76e6c/FLAG541c22b2e [2021-11-12 22:29:23,281 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:29:23,282 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c [2021-11-12 22:29:23,298 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/data/0ffd2b6e0/59d418af8b7949868882cf76b3f76e6c/FLAG541c22b2e [2021-11-12 22:29:23,612 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/data/0ffd2b6e0/59d418af8b7949868882cf76b3f76e6c [2021-11-12 22:29:23,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:29:23,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:29:23,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:23,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:29:23,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:29:23,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:23" (1/1) ... [2021-11-12 22:29:23,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ff85ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:23, skipping insertion in model container [2021-11-12 22:29:23,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:23" (1/1) ... [2021-11-12 22:29:23,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:29:23,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:23,899 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2021-11-12 22:29:23,915 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2021-11-12 22:29:24,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:24,034 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:29:24,053 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[1995,2008] [2021-11-12 22:29:24,055 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/sv-benchmarks/c/combinations/square_8+soft_float_1-3a.c.cil.c[2364,2377] [2021-11-12 22:29:24,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:24,106 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:29:24,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24 WrapperNode [2021-11-12 22:29:24,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:24,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:24,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:29:24,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:29:24,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:24,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:29:24,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:29:24,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:29:24,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:29:24,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:29:24,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:29:24,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:29:24,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:24,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:24,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:29:24,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:29:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:29:24,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:29:24,302 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-12 22:29:24,302 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-12 22:29:24,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:29:24,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:29:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 22:29:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 22:29:26,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:29:26,990 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:29:26,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:26 BoogieIcfgContainer [2021-11-12 22:29:26,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:29:26,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:29:26,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:29:27,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:29:27,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:29:23" (1/3) ... [2021-11-12 22:29:27,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77086254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:27, skipping insertion in model container [2021-11-12 22:29:27,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (2/3) ... [2021-11-12 22:29:27,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77086254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:27, skipping insertion in model container [2021-11-12 22:29:27,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:26" (3/3) ... [2021-11-12 22:29:27,004 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_1-3a.c.cil.c [2021-11-12 22:29:27,010 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:29:27,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 22:29:27,068 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:29:27,075 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 [2021-11-12 22:29:27,076 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 22:29:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 22:29:27,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 22:29:27,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:27,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:27,104 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-12 22:29:27,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:27,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576856842] [2021-11-12 22:29:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:27,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:27,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:27,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:27,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:29:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:27,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:29:27,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:28,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:28,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:28,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576856842] [2021-11-12 22:29:28,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576856842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:28,073 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:28,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:29:28,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142589905] [2021-11-12 22:29:28,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:28,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:29:28,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:29:28,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:29:28,139 INFO L87 Difference]: Start difference. First operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:28,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:28,179 INFO L93 Difference]: Finished difference Result 157 states and 249 transitions. [2021-11-12 22:29:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:29:28,182 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 22:29:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:28,193 INFO L225 Difference]: With dead ends: 157 [2021-11-12 22:29:28,193 INFO L226 Difference]: Without dead ends: 74 [2021-11-12 22:29:28,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:29:28,203 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:28,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:29:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-12 22:29:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-12 22:29:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 64 states have internal predecessors, (91), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 22:29:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2021-11-12 22:29:28,259 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 7 [2021-11-12 22:29:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:28,260 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2021-11-12 22:29:28,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2021-11-12 22:29:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 22:29:28,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:28,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:28,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:28,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:28,485 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:28,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:28,486 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-12 22:29:28,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:28,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721187308] [2021-11-12 22:29:28,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:28,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:28,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:28,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:28,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:30:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:53,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:30:53,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:08,380 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-12 22:31:58,631 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-11-12 22:32:00,678 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-11-12 22:32:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:32:00,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:11,330 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))))) is different from false [2021-11-12 22:32:13,407 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))))) is different from true [2021-11-12 22:32:28,281 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0)))))) is different from false [2021-11-12 22:32:30,353 WARN L860 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0)))))) is different from true [2021-11-12 22:33:14,782 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (fp.geq .cse1 (_ +zero 8 24))))))) is different from false [2021-11-12 22:33:16,858 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (fp.geq .cse1 (_ +zero 8 24))))))) is different from true [2021-11-12 22:33:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:59,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:59,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721187308] [2021-11-12 22:33:59,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721187308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:59,201 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:33:59,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 10 [2021-11-12 22:33:59,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222298523] [2021-11-12 22:33:59,202 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:59,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:33:59,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:59,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:33:59,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=20, Unknown=9, NotChecked=60, Total=110 [2021-11-12 22:33:59,205 INFO L87 Difference]: Start difference. First operand 74 states and 108 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:01,281 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (fp.geq .cse1 (_ +zero 8 24))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-12 22:34:03,354 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (fp.geq .cse1 (_ +zero 8 24))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-12 22:34:05,424 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse0 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))) (.cse1 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse3))) (or (and .cse0 .cse1 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse2 (or (not .cse0) (not .cse1))))) (or .cse2 (let ((.cse4 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse3 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse4 (_ +zero 8 24)) (fp.lt .cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0)))))))) is different from false [2021-11-12 22:34:07,502 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse0 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))) (.cse1 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse3))) (or (and .cse0 .cse1 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse2 (or (not .cse0) (not .cse1))))) (or .cse2 (let ((.cse4 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse3 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse4 (_ +zero 8 24)) (fp.lt .cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0)))))))) is different from true [2021-11-12 22:34:09,569 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse1) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from false [2021-11-12 22:34:11,648 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse1) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-12 22:34:13,725 WARN L838 $PredicateComparison]: unable to prove that (and (fp.geq |c_ULTIMATE.start_main1_~result~0#1| (_ +zero 8 24)) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (fp.lt |c_ULTIMATE.start_main1_~result~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-12 22:34:13,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:13,770 INFO L93 Difference]: Finished difference Result 74 states and 108 transitions. [2021-11-12 22:34:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:34:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 22:34:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:13,772 INFO L225 Difference]: With dead ends: 74 [2021-11-12 22:34:13,773 INFO L226 Difference]: Without dead ends: 69 [2021-11-12 22:34:13,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=29, Invalid=21, Unknown=16, NotChecked=144, Total=210 [2021-11-12 22:34:13,775 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 0 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.87ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 25.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:13,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 401 Invalid, 412 Unknown, 0 Unchecked, 6.87ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 409 Unchecked, 25.15ms Time] [2021-11-12 22:34:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-12 22:34:13,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-12 22:34:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 59 states have internal predecessors, (86), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-12 22:34:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 103 transitions. [2021-11-12 22:34:13,791 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 103 transitions. Word has length 7 [2021-11-12 22:34:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:13,791 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 103 transitions. [2021-11-12 22:34:13,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 103 transitions. [2021-11-12 22:34:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-12 22:34:13,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:13,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:13,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:13,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:13,998 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:13,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1413922597, now seen corresponding path program 1 times [2021-11-12 22:34:13,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:14,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730793926] [2021-11-12 22:34:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:14,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:14,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:14,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:14,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:34:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:14,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:34:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:14,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:14,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:14,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730793926] [2021-11-12 22:34:14,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730793926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:14,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1455774335] [2021-11-12 22:34:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:14,847 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:34:14,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:34:14,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:34:14,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 22:34:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:14,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:34:14,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:15,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:15,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1455774335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:15,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43401893] [2021-11-12 22:34:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:15,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:15,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:15,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:15,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 22:34:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:34:15,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:16,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:16,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43401893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:16,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:34:16,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 10 [2021-11-12 22:34:16,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144578796] [2021-11-12 22:34:16,374 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:34:16,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:34:16,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:16,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:34:16,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:34:16,376 INFO L87 Difference]: Start difference. First operand 69 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:34:18,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:18,537 INFO L93 Difference]: Finished difference Result 325 states and 523 transitions. [2021-11-12 22:34:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:34:18,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2021-11-12 22:34:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:18,546 INFO L225 Difference]: With dead ends: 325 [2021-11-12 22:34:18,546 INFO L226 Difference]: Without dead ends: 280 [2021-11-12 22:34:18,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:34:18,549 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 286 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1374.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.70ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1485.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:18,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1441 Invalid, 376 Unknown, 0 Unchecked, 15.70ms Time], IncrementalHoareTripleChecker [40 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1485.67ms Time] [2021-11-12 22:34:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-12 22:34:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 113. [2021-11-12 22:34:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 94 states have (on average 1.425531914893617) internal successors, (134), 95 states have internal predecessors, (134), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (21), 17 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-12 22:34:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 170 transitions. [2021-11-12 22:34:18,585 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 170 transitions. Word has length 33 [2021-11-12 22:34:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:18,586 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 170 transitions. [2021-11-12 22:34:18,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:34:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 170 transitions. [2021-11-12 22:34:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 22:34:18,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:18,590 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:18,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:18,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:19,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:19,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:19,204 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:19,204 INFO L85 PathProgramCache]: Analyzing trace with hash -458870352, now seen corresponding path program 1 times [2021-11-12 22:34:19,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:19,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535844520] [2021-11-12 22:34:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:19,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:19,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:19,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:34:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:34:19,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:19,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:19,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:19,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535844520] [2021-11-12 22:34:19,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535844520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:19,953 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:19,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-12 22:34:19,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774598417] [2021-11-12 22:34:19,954 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:19,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:34:19,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:19,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:34:19,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:34:19,955 INFO L87 Difference]: Start difference. First operand 113 states and 170 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:20,376 INFO L93 Difference]: Finished difference Result 249 states and 377 transitions. [2021-11-12 22:34:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:34:20,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-12 22:34:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:20,383 INFO L225 Difference]: With dead ends: 249 [2021-11-12 22:34:20,383 INFO L226 Difference]: Without dead ends: 188 [2021-11-12 22:34:20,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:34:20,388 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 52 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 324.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.63ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 353.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:20,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 465 Invalid, 71 Unknown, 0 Unchecked, 3.63ms Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 353.63ms Time] [2021-11-12 22:34:20,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-12 22:34:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-11-12 22:34:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 158 states have (on average 1.4177215189873418) internal successors, (224), 157 states have internal predecessors, (224), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2021-11-12 22:34:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 274 transitions. [2021-11-12 22:34:20,459 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 274 transitions. Word has length 41 [2021-11-12 22:34:20,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:20,460 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 274 transitions. [2021-11-12 22:34:20,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 274 transitions. [2021-11-12 22:34:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 22:34:20,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:20,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:20,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:20,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:20,682 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash 221188018, now seen corresponding path program 1 times [2021-11-12 22:34:20,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:20,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616707074] [2021-11-12 22:34:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:20,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:20,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:20,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:20,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:34:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:20,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:34:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:21,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:21,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:21,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616707074] [2021-11-12 22:34:21,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616707074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:21,438 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:21,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-12 22:34:21,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110499695] [2021-11-12 22:34:21,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:21,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:34:21,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:21,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:34:21,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:34:21,440 INFO L87 Difference]: Start difference. First operand 184 states and 274 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:21,951 INFO L93 Difference]: Finished difference Result 257 states and 384 transitions. [2021-11-12 22:34:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:34:21,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-12 22:34:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:21,954 INFO L225 Difference]: With dead ends: 257 [2021-11-12 22:34:21,955 INFO L226 Difference]: Without dead ends: 202 [2021-11-12 22:34:21,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:34:21,957 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 105 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 360.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.05ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 389.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:21,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 548 Invalid, 92 Unknown, 0 Unchecked, 4.05ms Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 389.80ms Time] [2021-11-12 22:34:21,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-12 22:34:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 175. [2021-11-12 22:34:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 152 states have (on average 1.394736842105263) internal successors, (212), 151 states have internal predecessors, (212), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-12 22:34:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2021-11-12 22:34:21,976 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 41 [2021-11-12 22:34:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:21,977 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2021-11-12 22:34:21,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2021-11-12 22:34:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 22:34:21,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:21,980 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:22,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:22,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:22,193 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:22,193 INFO L85 PathProgramCache]: Analyzing trace with hash 64679693, now seen corresponding path program 1 times [2021-11-12 22:34:22,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:22,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793382821] [2021-11-12 22:34:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:22,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:22,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:22,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:22,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:34:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:34:22,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:34:22,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:34:22,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:22,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793382821] [2021-11-12 22:34:22,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793382821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:22,772 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:22,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:34:22,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072238740] [2021-11-12 22:34:22,772 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:22,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:34:22,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:22,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:34:22,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:34:22,774 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:22,994 INFO L93 Difference]: Finished difference Result 349 states and 518 transitions. [2021-11-12 22:34:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:34:22,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-12 22:34:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:22,999 INFO L225 Difference]: With dead ends: 349 [2021-11-12 22:34:22,999 INFO L226 Difference]: Without dead ends: 283 [2021-11-12 22:34:23,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:34:23,001 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 112 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.41ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:23,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 488 Invalid, 43 Unknown, 0 Unchecked, 3.41ms Time], IncrementalHoareTripleChecker [15 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 156.15ms Time] [2021-11-12 22:34:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-12 22:34:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-11-12 22:34:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 208 states have (on average 1.3317307692307692) internal successors, (277), 205 states have internal predecessors, (277), 21 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (27), 27 states have call predecessors, (27), 20 states have call successors, (27) [2021-11-12 22:34:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 325 transitions. [2021-11-12 22:34:23,025 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 325 transitions. Word has length 44 [2021-11-12 22:34:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:23,026 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 325 transitions. [2021-11-12 22:34:23,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 325 transitions. [2021-11-12 22:34:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-12 22:34:23,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:23,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:23,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:23,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:23,243 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash -610339590, now seen corresponding path program 1 times [2021-11-12 22:34:23,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:23,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963795754] [2021-11-12 22:34:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:23,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:23,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:23,245 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:23,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:34:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:23,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:34:23,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:34:24,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:34:24,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:24,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963795754] [2021-11-12 22:34:24,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963795754] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:34:24,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:34:24,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-12 22:34:24,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195613082] [2021-11-12 22:34:24,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:24,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:34:24,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:24,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:34:24,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:34:24,739 INFO L87 Difference]: Start difference. First operand 233 states and 325 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:26,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:26,411 INFO L93 Difference]: Finished difference Result 405 states and 588 transitions. [2021-11-12 22:34:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:34:26,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-12 22:34:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:26,417 INFO L225 Difference]: With dead ends: 405 [2021-11-12 22:34:26,417 INFO L226 Difference]: Without dead ends: 369 [2021-11-12 22:34:26,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:34:26,419 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 192 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1207.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.61ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1326.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:26,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 513 Invalid, 245 Unknown, 0 Unchecked, 5.61ms Time], IncrementalHoareTripleChecker [18 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1326.19ms Time] [2021-11-12 22:34:26,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-12 22:34:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 286. [2021-11-12 22:34:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 253 states have (on average 1.3201581027667983) internal successors, (334), 251 states have internal predecessors, (334), 29 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (35), 35 states have call predecessors, (35), 28 states have call successors, (35) [2021-11-12 22:34:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 398 transitions. [2021-11-12 22:34:26,458 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 398 transitions. Word has length 45 [2021-11-12 22:34:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:26,459 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 398 transitions. [2021-11-12 22:34:26,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 398 transitions. [2021-11-12 22:34:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-12 22:34:26,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:26,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:26,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:26,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:26,686 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:26,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1164667772, now seen corresponding path program 1 times [2021-11-12 22:34:26,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:26,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30563554] [2021-11-12 22:34:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:26,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:26,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:26,690 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:26,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:34:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:26,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:34:26,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:34:26,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:34:27,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:27,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30563554] [2021-11-12 22:34:27,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30563554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:27,212 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:27,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:34:27,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193181132] [2021-11-12 22:34:27,212 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:27,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:34:27,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:34:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:34:27,214 INFO L87 Difference]: Start difference. First operand 286 states and 398 transitions. Second operand has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:27,404 INFO L93 Difference]: Finished difference Result 293 states and 404 transitions. [2021-11-12 22:34:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:34:27,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-12 22:34:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:27,408 INFO L225 Difference]: With dead ends: 293 [2021-11-12 22:34:27,409 INFO L226 Difference]: Without dead ends: 286 [2021-11-12 22:34:27,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:34:27,410 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 6 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:27,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 589 Invalid, 28 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 127.72ms Time] [2021-11-12 22:34:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-12 22:34:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2021-11-12 22:34:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 253 states have (on average 1.308300395256917) internal successors, (331), 251 states have internal predecessors, (331), 29 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (35), 35 states have call predecessors, (35), 28 states have call successors, (35) [2021-11-12 22:34:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 395 transitions. [2021-11-12 22:34:27,433 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 395 transitions. Word has length 45 [2021-11-12 22:34:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:27,434 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 395 transitions. [2021-11-12 22:34:27,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 395 transitions. [2021-11-12 22:34:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-12 22:34:27,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:27,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:27,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:27,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:27,650 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:27,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:27,650 INFO L85 PathProgramCache]: Analyzing trace with hash -617643621, now seen corresponding path program 2 times [2021-11-12 22:34:27,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:27,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152011876] [2021-11-12 22:34:27,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:34:27,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:27,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:27,652 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:27,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:34:27,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 22:34:27,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:34:27,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:34:27,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:34:28,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:34:28,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:28,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152011876] [2021-11-12 22:34:28,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152011876] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:28,556 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:28,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:34:28,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121366788] [2021-11-12 22:34:28,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:28,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:34:28,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:34:28,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:34:28,558 INFO L87 Difference]: Start difference. First operand 286 states and 395 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:29,087 INFO L93 Difference]: Finished difference Result 384 states and 539 transitions. [2021-11-12 22:34:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:34:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-12 22:34:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:29,093 INFO L225 Difference]: With dead ends: 384 [2021-11-12 22:34:29,093 INFO L226 Difference]: Without dead ends: 382 [2021-11-12 22:34:29,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:34:29,095 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 89 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 243.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.37ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 260.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:29,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 821 Invalid, 65 Unknown, 0 Unchecked, 4.37ms Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 16 Unchecked, 260.21ms Time] [2021-11-12 22:34:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-12 22:34:29,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 290. [2021-11-12 22:34:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 256 states have (on average 1.3046875) internal successors, (334), 254 states have internal predecessors, (334), 29 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (35), 35 states have call predecessors, (35), 28 states have call successors, (35) [2021-11-12 22:34:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 398 transitions. [2021-11-12 22:34:29,123 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 398 transitions. Word has length 45 [2021-11-12 22:34:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:29,124 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 398 transitions. [2021-11-12 22:34:29,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 398 transitions. [2021-11-12 22:34:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-12 22:34:29,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:29,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:29,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:29,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:29,340 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:29,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1322710928, now seen corresponding path program 1 times [2021-11-12 22:34:29,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:29,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72002355] [2021-11-12 22:34:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:29,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:29,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:29,342 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:29,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:34:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:34:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:34:29,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:34:29,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:29,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72002355] [2021-11-12 22:34:29,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72002355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:29,845 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:29,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:34:29,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085956164] [2021-11-12 22:34:29,845 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:29,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:34:29,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:34:29,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:34:29,846 INFO L87 Difference]: Start difference. First operand 290 states and 398 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:30,029 INFO L93 Difference]: Finished difference Result 620 states and 859 transitions. [2021-11-12 22:34:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:34:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-11-12 22:34:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:30,035 INFO L225 Difference]: With dead ends: 620 [2021-11-12 22:34:30,035 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 22:34:30,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:34:30,037 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 125 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.82ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:30,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 400 Invalid, 35 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [17 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 102.82ms Time] [2021-11-12 22:34:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 22:34:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 309. [2021-11-12 22:34:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 272 states have (on average 1.3088235294117647) internal successors, (356), 269 states have internal predecessors, (356), 32 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (38), 38 states have call predecessors, (38), 31 states have call successors, (38) [2021-11-12 22:34:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 426 transitions. [2021-11-12 22:34:30,070 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 426 transitions. Word has length 46 [2021-11-12 22:34:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:30,070 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 426 transitions. [2021-11-12 22:34:30,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 426 transitions. [2021-11-12 22:34:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 22:34:30,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:30,073 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:30,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:30,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:30,286 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:30,286 INFO L85 PathProgramCache]: Analyzing trace with hash -514674649, now seen corresponding path program 1 times [2021-11-12 22:34:30,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:30,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103737223] [2021-11-12 22:34:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:30,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:30,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:30,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:30,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:34:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:30,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:34:30,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:34:30,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:34:30,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:30,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103737223] [2021-11-12 22:34:30,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103737223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:30,681 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:30,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:34:30,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569186715] [2021-11-12 22:34:30,681 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:30,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:34:30,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:34:30,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:34:30,682 INFO L87 Difference]: Start difference. First operand 309 states and 426 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:30,783 INFO L93 Difference]: Finished difference Result 324 states and 442 transitions. [2021-11-12 22:34:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:34:30,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-11-12 22:34:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:30,787 INFO L225 Difference]: With dead ends: 324 [2021-11-12 22:34:30,787 INFO L226 Difference]: Without dead ends: 266 [2021-11-12 22:34:30,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:34:30,788 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.88ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:30,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 294 Invalid, 8 Unknown, 0 Unchecked, 0.88ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 44.04ms Time] [2021-11-12 22:34:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-12 22:34:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-11-12 22:34:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 229 states have (on average 1.3231441048034935) internal successors, (303), 228 states have internal predecessors, (303), 32 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (36), 36 states have call predecessors, (36), 31 states have call successors, (36) [2021-11-12 22:34:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 371 transitions. [2021-11-12 22:34:30,814 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 371 transitions. Word has length 49 [2021-11-12 22:34:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:30,821 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 371 transitions. [2021-11-12 22:34:30,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 371 transitions. [2021-11-12 22:34:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-12 22:34:30,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:30,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:30,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:31,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:31,036 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash -627639643, now seen corresponding path program 1 times [2021-11-12 22:34:31,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:31,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423473959] [2021-11-12 22:34:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:31,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:31,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:31,038 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:31,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:34:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:31,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:34:31,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:34:31,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:34:31,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:31,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423473959] [2021-11-12 22:34:31,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423473959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:31,527 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:31,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:34:31,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792650715] [2021-11-12 22:34:31,528 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:31,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:34:31,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:31,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:34:31,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:34:31,529 INFO L87 Difference]: Start difference. First operand 266 states and 371 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:32,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:32,060 INFO L93 Difference]: Finished difference Result 418 states and 576 transitions. [2021-11-12 22:34:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:34:32,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-12 22:34:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:32,065 INFO L225 Difference]: With dead ends: 418 [2021-11-12 22:34:32,065 INFO L226 Difference]: Without dead ends: 376 [2021-11-12 22:34:32,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:34:32,066 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 147 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 290.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.10ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 313.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:32,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 533 Invalid, 79 Unknown, 0 Unchecked, 3.10ms Time], IncrementalHoareTripleChecker [30 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 313.06ms Time] [2021-11-12 22:34:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-12 22:34:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 266. [2021-11-12 22:34:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 229 states have (on average 1.314410480349345) internal successors, (301), 228 states have internal predecessors, (301), 32 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (36), 36 states have call predecessors, (36), 31 states have call successors, (36) [2021-11-12 22:34:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 369 transitions. [2021-11-12 22:34:32,098 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 369 transitions. Word has length 50 [2021-11-12 22:34:32,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:32,098 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 369 transitions. [2021-11-12 22:34:32,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 22:34:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 369 transitions. [2021-11-12 22:34:32,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 22:34:32,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:32,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:32,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:32,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:32,315 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:32,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1892770879, now seen corresponding path program 1 times [2021-11-12 22:34:32,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:32,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689642817] [2021-11-12 22:34:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:32,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:32,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:32,317 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:32,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:34:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:34:32,386 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 22:34:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:34:32,494 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-12 22:34:32,494 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 22:34:32,495 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-12 22:34:32,497 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-12 22:34:32,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:32,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:32,716 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:32,719 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:34:32,744 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) 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) [2021-11-12 22:34:32,746 INFO L158 Benchmark]: Toolchain (without parser) took 309129.39ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.9MB in the beginning and 22.4MB in the end (delta: 9.5MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2021-11-12 22:34:32,747 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 54.5MB. Free memory was 35.8MB in the beginning and 35.7MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:34:32,747 INFO L158 Benchmark]: CACSL2BoogieTranslator took 488.78ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.7MB in the beginning and 46.3MB in the end (delta: -14.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:34:32,748 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.10ms. Allocated memory is still 67.1MB. Free memory was 46.1MB in the beginning and 44.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:34:32,748 INFO L158 Benchmark]: Boogie Preprocessor took 45.32ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 42.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:34:32,748 INFO L158 Benchmark]: RCFGBuilder took 2782.02ms. Allocated memory is still 67.1MB. Free memory was 42.2MB in the beginning and 44.0MB in the end (delta: -1.8MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-11-12 22:34:32,749 INFO L158 Benchmark]: TraceAbstraction took 305750.28ms. Allocated memory is still 67.1MB. Free memory was 43.4MB in the beginning and 22.4MB in the end (delta: 21.1MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. [2021-11-12 22:34:32,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 54.5MB. Free memory was 35.8MB in the beginning and 35.7MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 488.78ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.7MB in the beginning and 46.3MB in the end (delta: -14.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.10ms. Allocated memory is still 67.1MB. Free memory was 46.1MB in the beginning and 44.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.32ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 42.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2782.02ms. Allocated memory is still 67.1MB. Free memory was 42.2MB in the beginning and 44.0MB in the end (delta: -1.8MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. * TraceAbstraction took 305750.28ms. Allocated memory is still 67.1MB. Free memory was 43.4MB in the beginning and 22.4MB in the end (delta: 21.1MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 22:34:32,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85339c43-98bd-4ff1-bad2-56a65650f833/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null