./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8 --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 98a25bc9184960cfd1e3dbcc73ba5f610d35e2a4 ........................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8 --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 98a25bc9184960cfd1e3dbcc73ba5f610d35e2a4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:35:54,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:35:54,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:35:54,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:35:54,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:35:54,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:35:54,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:35:54,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:35:54,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:35:54,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:35:54,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:35:54,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:35:54,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:35:54,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:35:54,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:35:54,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:35:54,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:35:54,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:35:54,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:35:54,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:35:54,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:35:54,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:35:54,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:35:54,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:35:54,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:35:54,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:35:54,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:35:54,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:35:54,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:35:54,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:35:54,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:35:54,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:35:54,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:35:54,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:35:54,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:35:54,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:35:54,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:35:54,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:35:54,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:35:54,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:35:54,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:35:54,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:35:54,225 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:35:54,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:35:54,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:35:54,226 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:35:54,227 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:35:54,227 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:35:54,227 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:35:54,227 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:35:54,228 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:35:54,228 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:35:54,228 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:35:54,228 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:35:54,229 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:35:54,229 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:35:54,229 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:35:54,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:35:54,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:35:54,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:35:54,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:35:54,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:35:54,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:35:54,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:35:54,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:35:54,232 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:35:54,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:35:54,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:35:54,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:35:54,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:35:54,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:35:54,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:35:54,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:35:54,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:35:54,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:35:54,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:35:54,240 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:35:54,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:35:54,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:35:54,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:35:54,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:35:54,242 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_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98a25bc9184960cfd1e3dbcc73ba5f610d35e2a4 [2021-10-13 07:35:54,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:35:54,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:35:54,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:35:54,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:35:54,593 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:35:54,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2021-10-13 07:35:54,675 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/data/361554ace/3aa62d619ebb4313b51d1b93767701ce/FLAGac6c14e01 [2021-10-13 07:35:55,210 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:35:55,217 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2021-10-13 07:35:55,231 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/data/361554ace/3aa62d619ebb4313b51d1b93767701ce/FLAGac6c14e01 [2021-10-13 07:35:55,546 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/data/361554ace/3aa62d619ebb4313b51d1b93767701ce [2021-10-13 07:35:55,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:35:55,553 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:35:55,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:35:55,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:35:55,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:35:55,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14860660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55, skipping insertion in model container [2021-10-13 07:35:55,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:35:55,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:35:55,767 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_d992513f-cca2-405e-a1f7-a4eae357c24d/sv-benchmarks/c/loop-acceleration/diamond_1-2.c[373,386] [2021-10-13 07:35:55,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:35:55,803 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:35:55,827 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_d992513f-cca2-405e-a1f7-a4eae357c24d/sv-benchmarks/c/loop-acceleration/diamond_1-2.c[373,386] [2021-10-13 07:35:55,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:35:55,860 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:35:55,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55 WrapperNode [2021-10-13 07:35:55,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:35:55,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:35:55,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:35:55,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:35:55,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:35:55,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:35:55,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:35:55,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:35:55,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:35:55,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:35:55,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:35:55,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:35:55,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (1/1) ... [2021-10-13 07:35:55,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:35:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:35:55,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:35:56,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:35:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:35:56,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:35:56,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:35:56,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:35:56,323 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:35:56,323 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:35:56,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:35:56 BoogieIcfgContainer [2021-10-13 07:35:56,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:35:56,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:35:56,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:35:56,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:35:56,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:35:55" (1/3) ... [2021-10-13 07:35:56,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:35:56, skipping insertion in model container [2021-10-13 07:35:56,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:35:55" (2/3) ... [2021-10-13 07:35:56,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:35:56, skipping insertion in model container [2021-10-13 07:35:56,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:35:56" (3/3) ... [2021-10-13 07:35:56,336 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2021-10-13 07:35:56,342 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:35:56,342 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:35:56,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:35:56,397 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, mConcurrency=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 [2021-10-13 07:35:56,398 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:35:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2021-10-13 07:35:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:35:56,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:35:56,419 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:35:56,420 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:35:56,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:35:56,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2005416, now seen corresponding path program 1 times [2021-10-13 07:35:56,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:35:56,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903587368] [2021-10-13 07:35:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:56,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:35:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:35:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:35:56,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:35:56,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903587368] [2021-10-13 07:35:56,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903587368] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:35:56,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:35:56,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:35:56,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312904625] [2021-10-13 07:35:56,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:35:56,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:35:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:35:56,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:35:56,702 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-13 07:35:56,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:35:56,754 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-13 07:35:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:35:56,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-13 07:35:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:35:56,765 INFO L225 Difference]: With dead ends: 13 [2021-10-13 07:35:56,765 INFO L226 Difference]: Without dead ends: 6 [2021-10-13 07:35:56,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:35:56,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-13 07:35:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-13 07:35:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:35:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-13 07:35:56,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-13 07:35:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:35:56,801 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-13 07:35:56,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-13 07:35:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-13 07:35:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:35:56,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:35:56,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:35:56,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:35:56,803 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:35:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:35:56,804 INFO L82 PathProgramCache]: Analyzing trace with hash 62123654, now seen corresponding path program 1 times [2021-10-13 07:35:56,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:35:56,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373901104] [2021-10-13 07:35:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:56,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:35:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:35:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:35:56,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:35:56,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373901104] [2021-10-13 07:35:56,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373901104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:35:56,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272998403] [2021-10-13 07:35:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:35:56,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:56,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:35:56,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:35:57,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:35:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:35:57,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:35:57,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:35:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:35:57,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:35:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:35:57,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272998403] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:35:57,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064514616] [2021-10-13 07:35:57,511 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-13 07:35:57,511 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:35:57,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:35:57,523 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:35:57,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:35:57,560 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:35:57,568 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:35:57,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:35:57,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:35:57,573 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:35:57,574 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:35:57,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:35:57,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-13 07:35:57,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:35:57,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:35:57,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:35:57,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 07:35:57,646 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:35:57,648 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:35:57,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:35:57,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:35:57,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:35:57,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:35:57,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:35:57,719 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:35:57,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-13 07:35:57,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:35:57,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:119, output treesize:122 [2021-10-13 07:35:57,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:35:57,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:35:57,926 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_10| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) 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) [2021-10-13 07:35:57,930 INFO L168 Benchmark]: Toolchain (without parser) took 2376.24 ms. Allocated memory was 117.4 MB in the beginning and 148.9 MB in the end (delta: 31.5 MB). Free memory was 75.0 MB in the beginning and 110.5 MB in the end (delta: -35.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:35:57,931 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 117.4 MB. Free memory is still 91.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:35:57,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.53 ms. Allocated memory is still 117.4 MB. Free memory was 74.8 MB in the beginning and 92.2 MB in the end (delta: -17.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:35:57,933 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.92 ms. Allocated memory is still 117.4 MB. Free memory was 92.2 MB in the beginning and 90.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:35:57,933 INFO L168 Benchmark]: Boogie Preprocessor took 41.19 ms. Allocated memory is still 117.4 MB. Free memory was 90.7 MB in the beginning and 89.7 MB in the end (delta: 961.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:35:57,934 INFO L168 Benchmark]: RCFGBuilder took 372.02 ms. Allocated memory is still 117.4 MB. Free memory was 89.7 MB in the beginning and 79.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:35:57,935 INFO L168 Benchmark]: TraceAbstraction took 1600.93 ms. Allocated memory was 117.4 MB in the beginning and 148.9 MB in the end (delta: 31.5 MB). Free memory was 78.5 MB in the beginning and 110.5 MB in the end (delta: -31.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:35:57,940 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 117.4 MB. Free memory is still 91.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.53 ms. Allocated memory is still 117.4 MB. Free memory was 74.8 MB in the beginning and 92.2 MB in the end (delta: -17.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.92 ms. Allocated memory is still 117.4 MB. Free memory was 92.2 MB in the beginning and 90.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.19 ms. Allocated memory is still 117.4 MB. Free memory was 90.7 MB in the beginning and 89.7 MB in the end (delta: 961.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 372.02 ms. Allocated memory is still 117.4 MB. Free memory was 89.7 MB in the beginning and 79.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1600.93 ms. Allocated memory was 117.4 MB in the beginning and 148.9 MB in the end (delta: 31.5 MB). Free memory was 78.5 MB in the beginning and 110.5 MB in the end (delta: -31.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_10| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_10|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:35:57,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:36:00,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:36:00,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:36:00,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:36:00,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:36:00,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:36:00,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:36:00,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:36:00,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:36:00,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:36:00,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:36:00,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:36:00,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:36:00,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:36:00,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:36:00,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:36:00,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:36:00,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:36:00,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:36:00,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:36:00,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:36:00,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:36:00,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:36:00,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:36:00,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:36:00,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:36:00,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:36:00,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:36:00,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:36:00,858 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:36:00,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:36:00,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:36:00,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:36:00,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:36:00,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:36:00,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:36:00,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:36:00,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:36:00,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:36:00,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:36:00,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:36:00,876 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:36:00,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:36:00,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:36:00,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:36:00,923 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:36:00,923 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:36:00,923 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:36:00,923 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:36:00,923 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:36:00,924 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:36:00,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:36:00,926 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:36:00,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:36:00,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:36:00,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:36:00,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:36:00,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:36:00,927 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:36:00,927 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:36:00,928 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:36:00,928 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:36:00,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:36:00,928 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:36:00,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:36:00,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:36:00,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:36:00,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:36:00,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:36:00,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:36:00,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:36:00,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:36:00,930 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:36:00,930 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:00,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:36:00,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:36:00,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:36:00,932 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_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98a25bc9184960cfd1e3dbcc73ba5f610d35e2a4 [2021-10-13 07:36:01,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:36:01,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:36:01,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:36:01,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:36:01,365 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:36:01,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2021-10-13 07:36:01,441 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/data/ae9adeb94/25db4d8f74b84f91b3bd150bd1482ba4/FLAG8f57c53ee [2021-10-13 07:36:02,028 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:36:02,029 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2021-10-13 07:36:02,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/data/ae9adeb94/25db4d8f74b84f91b3bd150bd1482ba4/FLAG8f57c53ee [2021-10-13 07:36:02,400 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/data/ae9adeb94/25db4d8f74b84f91b3bd150bd1482ba4 [2021-10-13 07:36:02,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:36:02,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:36:02,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:36:02,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:36:02,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:36:02,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b0ee1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02, skipping insertion in model container [2021-10-13 07:36:02,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:36:02,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:36:02,663 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_d992513f-cca2-405e-a1f7-a4eae357c24d/sv-benchmarks/c/loop-acceleration/diamond_1-2.c[373,386] [2021-10-13 07:36:02,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:36:02,688 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:36:02,723 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_d992513f-cca2-405e-a1f7-a4eae357c24d/sv-benchmarks/c/loop-acceleration/diamond_1-2.c[373,386] [2021-10-13 07:36:02,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:36:02,760 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:36:02,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02 WrapperNode [2021-10-13 07:36:02,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:36:02,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:36:02,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:36:02,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:36:02,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:36:02,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:36:02,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:36:02,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:36:02,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:36:02,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:36:02,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:36:02,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:36:02,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (1/1) ... [2021-10-13 07:36:02,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:36:02,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:02,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:36:02,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:36:02,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:36:02,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:36:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:36:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:36:03,236 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:36:03,236 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:36:03,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:36:03 BoogieIcfgContainer [2021-10-13 07:36:03,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:36:03,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:36:03,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:36:03,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:36:03,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:36:02" (1/3) ... [2021-10-13 07:36:03,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5283d82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:36:03, skipping insertion in model container [2021-10-13 07:36:03,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:36:02" (2/3) ... [2021-10-13 07:36:03,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5283d82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:36:03, skipping insertion in model container [2021-10-13 07:36:03,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:36:03" (3/3) ... [2021-10-13 07:36:03,263 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2021-10-13 07:36:03,269 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:36:03,269 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:36:03,337 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:36:03,352 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, mConcurrency=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 [2021-10-13 07:36:03,353 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:36:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) 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) [2021-10-13 07:36:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:36:03,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:03,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:36:03,379 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:03,393 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-10-13 07:36:03,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:03,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812216501] [2021-10-13 07:36:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:03,412 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:03,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:03,415 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:03,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:36:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:03,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:36:03,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:03,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:03,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:03,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812216501] [2021-10-13 07:36:03,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812216501] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:36:03,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:36:03,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:36:03,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489656345] [2021-10-13 07:36:03,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:36:03,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:36:03,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:36:03,691 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:36:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:03,705 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-10-13 07:36:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:36:03,707 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:36:03,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:03,715 INFO L225 Difference]: With dead ends: 18 [2021-10-13 07:36:03,715 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 07:36:03,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:36:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 07:36:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 07:36:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2021-10-13 07:36:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-13 07:36:03,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-13 07:36:03,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:03,750 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-13 07:36:03,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:36:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-13 07:36:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:36:03,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:03,752 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:36:03,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:03,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:36:03,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:03,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:03,965 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-10-13 07:36:03,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:03,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134951252] [2021-10-13 07:36:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:03,967 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:03,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:03,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:03,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:36:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:04,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:36:04,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:04,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:04,092 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:04,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134951252] [2021-10-13 07:36:04,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134951252] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:36:04,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:36:04,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:36:04,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720492174] [2021-10-13 07:36:04,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:36:04,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:36:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:36:04,097 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 07:36:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:04,125 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-10-13 07:36:04,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:36:04,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:36:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:04,127 INFO L225 Difference]: With dead ends: 15 [2021-10-13 07:36:04,127 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 07:36:04,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:36:04,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 07:36:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 07:36:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:36:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-13 07:36:04,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 6 [2021-10-13 07:36:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:04,133 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-13 07:36:04,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 07:36:04,134 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-13 07:36:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:36:04,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:04,135 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:04,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:04,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:36:04,361 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:04,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1775672709, now seen corresponding path program 1 times [2021-10-13 07:36:04,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:04,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907188400] [2021-10-13 07:36:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:04,363 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:04,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:04,364 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:04,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:36:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:04,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:36:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:04,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:04,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:04,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907188400] [2021-10-13 07:36:04,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907188400] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:04,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [344520312] [2021-10-13 07:36:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:04,585 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:04,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:36:04,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:36:04,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:36:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:04,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:36:04,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:04,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:04,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [344520312] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:04,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290116508] [2021-10-13 07:36:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:04,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:04,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:04,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:04,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:36:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:04,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:36:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:05,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:05,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290116508] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:05,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:36:05,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-10-13 07:36:05,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862632051] [2021-10-13 07:36:05,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:36:05,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:36:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:36:05,127 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:36:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:05,326 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2021-10-13 07:36:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:36:05,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:36:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:05,329 INFO L225 Difference]: With dead ends: 24 [2021-10-13 07:36:05,329 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 07:36:05,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:36:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 07:36:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-10-13 07:36:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2021-10-13 07:36:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-10-13 07:36:05,339 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 10 [2021-10-13 07:36:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:05,339 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-10-13 07:36:05,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:36:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-10-13 07:36:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:36:05,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:05,341 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:05,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:05,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:05,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:05,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:05,964 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1278211843, now seen corresponding path program 1 times [2021-10-13 07:36:05,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:05,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354999874] [2021-10-13 07:36:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:05,965 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:05,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:05,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:05,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:36:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:06,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:36:06,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:36:06,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:36:06,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:06,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354999874] [2021-10-13 07:36:06,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354999874] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:36:06,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:36:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:36:06,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059140408] [2021-10-13 07:36:06,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:36:06,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:36:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:36:06,136 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-13 07:36:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:06,150 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-10-13 07:36:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:36:06,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:36:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:06,152 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:36:06,152 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 07:36:06,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:36:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 07:36:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-10-13 07:36:06,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2021-10-13 07:36:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-10-13 07:36:06,160 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 14 [2021-10-13 07:36:06,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:06,161 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-10-13 07:36:06,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-13 07:36:06,161 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-10-13 07:36:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:36:06,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:06,162 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:06,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:06,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:36:06,380 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:06,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1178700931, now seen corresponding path program 1 times [2021-10-13 07:36:06,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:06,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013155987] [2021-10-13 07:36:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:06,381 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:06,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:06,383 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:06,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:36:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:06,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:36:06,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:06,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:06,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:06,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013155987] [2021-10-13 07:36:06,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013155987] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:06,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1948014816] [2021-10-13 07:36:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:06,746 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:06,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:36:06,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:36:06,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-13 07:36:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:06,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:36:06,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:06,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:07,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1948014816] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:07,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002814270] [2021-10-13 07:36:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:36:07,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:07,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:07,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:07,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 07:36:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:36:07,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:36:07,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:07,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:36:07,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002814270] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:07,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:36:07,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 6] total 21 [2021-10-13 07:36:07,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355206952] [2021-10-13 07:36:07,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 07:36:07,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:07,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 07:36:07,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-10-13 07:36:07,670 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2021-10-13 07:36:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:08,500 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2021-10-13 07:36:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 07:36:08,501 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:36:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:08,502 INFO L225 Difference]: With dead ends: 56 [2021-10-13 07:36:08,502 INFO L226 Difference]: Without dead ends: 45 [2021-10-13 07:36:08,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 875.5ms TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 07:36:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-13 07:36:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-10-13 07:36:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:36:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-10-13 07:36:08,518 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 14 [2021-10-13 07:36:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:08,519 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-10-13 07:36:08,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2021-10-13 07:36:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-10-13 07:36:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:36:08,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:08,520 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:08,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:08,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:08,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-13 07:36:09,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:09,122 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:09,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:09,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1714863729, now seen corresponding path program 2 times [2021-10-13 07:36:09,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:09,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039947949] [2021-10-13 07:36:09,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:36:09,123 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:09,125 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:09,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:36:09,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:36:09,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:09,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:36:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:09,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:09,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:09,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039947949] [2021-10-13 07:36:09,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039947949] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:09,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1245881764] [2021-10-13 07:36:09,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:36:09,552 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:09,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:36:09,552 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:36:09,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:36:09,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:36:09,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:09,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:36:09,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:09,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:09,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1245881764] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:09,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534175363] [2021-10-13 07:36:09,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:36:09,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:09,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:09,908 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:09,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:36:10,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:36:10,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:36:10,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:10,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:10,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534175363] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:10,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:36:10,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 10] total 22 [2021-10-13 07:36:10,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620599396] [2021-10-13 07:36:10,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 07:36:10,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:10,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 07:36:10,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:36:10,525 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2021-10-13 07:36:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:11,088 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-10-13 07:36:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:36:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 07:36:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:11,090 INFO L225 Difference]: With dead ends: 60 [2021-10-13 07:36:11,090 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 07:36:11,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 711.7ms TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-10-13 07:36:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 07:36:11,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-13 07:36:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 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) [2021-10-13 07:36:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-10-13 07:36:11,104 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 18 [2021-10-13 07:36:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:11,105 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-10-13 07:36:11,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2021-10-13 07:36:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-10-13 07:36:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:36:11,107 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:11,107 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:11,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:11,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:11,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:11,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:11,716 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:11,717 INFO L82 PathProgramCache]: Analyzing trace with hash 846760114, now seen corresponding path program 2 times [2021-10-13 07:36:11,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:11,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147121699] [2021-10-13 07:36:11,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:36:11,718 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:11,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:11,719 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:11,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:36:11,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:36:11,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:11,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:36:11,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:12,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:12,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:12,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147121699] [2021-10-13 07:36:12,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147121699] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:12,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1467103054] [2021-10-13 07:36:12,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:36:12,565 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:12,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:36:12,567 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:36:12,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 07:36:12,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:36:12,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:12,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:36:12,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:12,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:13,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1467103054] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:13,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468021781] [2021-10-13 07:36:13,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:36:13,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:13,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:13,084 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:13,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 07:36:13,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:36:13,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:36:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:13,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:14,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468021781] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:14,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:36:14,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 15] total 37 [2021-10-13 07:36:14,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826103819] [2021-10-13 07:36:14,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 07:36:14,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:14,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 07:36:14,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=919, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 07:36:14,273 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 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) [2021-10-13 07:36:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:15,762 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-10-13 07:36:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 07:36:15,763 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 07:36:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:15,763 INFO L225 Difference]: With dead ends: 88 [2021-10-13 07:36:15,764 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 07:36:15,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2045.0ms TimeCoverageRelationStatistics Valid=792, Invalid=1560, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 07:36:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 07:36:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-13 07:36:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 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) [2021-10-13 07:36:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-10-13 07:36:15,785 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 28 [2021-10-13 07:36:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:15,786 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-10-13 07:36:15,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 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) [2021-10-13 07:36:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-10-13 07:36:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 07:36:15,788 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:15,788 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:15,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:15,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:16,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:16,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:16,389 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:16,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash -340130889, now seen corresponding path program 3 times [2021-10-13 07:36:16,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:16,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149091233] [2021-10-13 07:36:16,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:36:16,390 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:16,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:16,392 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:16,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:36:16,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:36:16,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:16,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:36:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:16,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:17,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:17,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149091233] [2021-10-13 07:36:17,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149091233] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:17,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [58872611] [2021-10-13 07:36:17,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:36:17,835 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:17,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:36:17,840 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:36:17,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 07:36:18,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:36:18,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:18,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:36:18,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:18,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:18,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [58872611] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:18,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179147329] [2021-10-13 07:36:18,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:36:18,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:18,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:18,651 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:18,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 07:36:18,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 07:36:18,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:18,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:36:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:19,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:19,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179147329] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:19,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:36:19,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17, 18, 17, 18] total 33 [2021-10-13 07:36:19,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595624237] [2021-10-13 07:36:19,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 07:36:19,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 07:36:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 07:36:19,396 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 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) [2021-10-13 07:36:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:21,640 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2021-10-13 07:36:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 07:36:21,640 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 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 34 [2021-10-13 07:36:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:21,642 INFO L225 Difference]: With dead ends: 120 [2021-10-13 07:36:21,642 INFO L226 Difference]: Without dead ends: 116 [2021-10-13 07:36:21,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2447.7ms TimeCoverageRelationStatistics Valid=798, Invalid=1458, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 07:36:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-13 07:36:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-13 07:36:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 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) [2021-10-13 07:36:21,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2021-10-13 07:36:21,661 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 34 [2021-10-13 07:36:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:21,661 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2021-10-13 07:36:21,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 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) [2021-10-13 07:36:21,662 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2021-10-13 07:36:21,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 07:36:21,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:21,665 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:21,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:21,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:22,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-13 07:36:22,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:36:22,276 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:22,276 INFO L82 PathProgramCache]: Analyzing trace with hash 282706140, now seen corresponding path program 3 times [2021-10-13 07:36:22,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:22,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032868630] [2021-10-13 07:36:22,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:36:22,277 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:22,278 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:22,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:36:22,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-13 07:36:22,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:36:22,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:23,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:26,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:26,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032868630] [2021-10-13 07:36:26,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032868630] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:26,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1707538047] [2021-10-13 07:36:26,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:36:26,507 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:26,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:36:26,513 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:36:26,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-13 07:36:27,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-13 07:36:27,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:27,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:36:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:27,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:28,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1707538047] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:28,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743927328] [2021-10-13 07:36:28,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:36:28,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:28,603 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:28,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 07:36:29,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-13 07:36:29,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 07:36:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:30,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:32,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743927328] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:32,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:36:32,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31, 28, 31, 28, 29] total 90 [2021-10-13 07:36:32,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116491109] [2021-10-13 07:36:32,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-10-13 07:36:32,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:32,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-10-13 07:36:32,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2077, Invalid=5933, Unknown=0, NotChecked=0, Total=8010 [2021-10-13 07:36:32,369 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 90 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 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) [2021-10-13 07:36:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:36:46,995 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2021-10-13 07:36:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-13 07:36:46,995 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 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 56 [2021-10-13 07:36:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:36:46,999 INFO L225 Difference]: With dead ends: 178 [2021-10-13 07:36:46,999 INFO L226 Difference]: Without dead ends: 174 [2021-10-13 07:36:47,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3027 ImplicationChecksByTransitivity, 18088.9ms TimeCoverageRelationStatistics Valid=5564, Invalid=11466, Unknown=0, NotChecked=0, Total=17030 [2021-10-13 07:36:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-10-13 07:36:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-10-13 07:36:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 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) [2021-10-13 07:36:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2021-10-13 07:36:47,051 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 56 [2021-10-13 07:36:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:36:47,052 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2021-10-13 07:36:47,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 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) [2021-10-13 07:36:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2021-10-13 07:36:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-13 07:36:47,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:36:47,056 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-10-13 07:36:47,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:47,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:47,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:36:47,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:47,670 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:36:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:36:47,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1787795463, now seen corresponding path program 4 times [2021-10-13 07:36:47,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:36:47,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427940381] [2021-10-13 07:36:47,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:36:47,671 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:36:47,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:36:47,672 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:36:47,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 07:36:48,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:36:48,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:48,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:36:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:48,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:50,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:36:50,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427940381] [2021-10-13 07:36:50,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427940381] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:50,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1888010613] [2021-10-13 07:36:50,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:36:50,272 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:36:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:36:50,273 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:36:50,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 07:36:50,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:36:50,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:50,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:36:50,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:51,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:51,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1888010613] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:51,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328725657] [2021-10-13 07:36:51,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 07:36:51,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:36:51,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:36:51,385 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:36:51,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 07:36:51,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 07:36:51,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:36:51,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 07:36:51,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:36:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:52,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:36:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:36:55,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328725657] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:36:55,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:36:55,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 34] total 94 [2021-10-13 07:36:55,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328549860] [2021-10-13 07:36:55,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-10-13 07:36:55,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:36:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-10-13 07:36:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2464, Invalid=6278, Unknown=0, NotChecked=0, Total=8742 [2021-10-13 07:36:55,710 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 94 states, 94 states have (on average 2.0) internal successors, (188), 94 states have internal predecessors, (188), 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) [2021-10-13 07:37:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:37:15,136 INFO L93 Difference]: Finished difference Result 240 states and 273 transitions. [2021-10-13 07:37:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-10-13 07:37:15,136 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 94 states have internal predecessors, (188), 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 66 [2021-10-13 07:37:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:37:15,138 INFO L225 Difference]: With dead ends: 240 [2021-10-13 07:37:15,138 INFO L226 Difference]: Without dead ends: 236 [2021-10-13 07:37:15,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 22579.9ms TimeCoverageRelationStatistics Valid=6450, Invalid=14430, Unknown=0, NotChecked=0, Total=20880 [2021-10-13 07:37:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-13 07:37:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-10-13 07:37:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 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) [2021-10-13 07:37:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 239 transitions. [2021-10-13 07:37:15,194 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 239 transitions. Word has length 66 [2021-10-13 07:37:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:37:15,195 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 239 transitions. [2021-10-13 07:37:15,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 94 states have internal predecessors, (188), 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) [2021-10-13 07:37:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 239 transitions. [2021-10-13 07:37:15,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-13 07:37:15,199 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:37:15,199 INFO L512 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2021-10-13 07:37:15,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:15,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:15,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:15,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:37:15,816 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:37:15,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:37:15,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1185534101, now seen corresponding path program 5 times [2021-10-13 07:37:15,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:37:15,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93773972] [2021-10-13 07:37:15,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 07:37:15,817 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:37:15,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:37:15,818 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:37:15,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 07:37:16,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2021-10-13 07:37:16,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 07:37:16,429 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:37:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:37:16,570 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:37:16,570 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:37:16,571 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:37:16,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 07:37:16,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:37:16,793 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:37:16,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:37:16 BoogieIcfgContainer [2021-10-13 07:37:16,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:37:16,887 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:37:16,887 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:37:16,887 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:37:16,888 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:36:03" (3/4) ... [2021-10-13 07:37:16,890 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:37:17,038 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:37:17,039 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:37:17,040 INFO L168 Benchmark]: Toolchain (without parser) took 74625.46 ms. Allocated memory was 48.2 MB in the beginning and 88.1 MB in the end (delta: 39.8 MB). Free memory was 22.3 MB in the beginning and 53.7 MB in the end (delta: -31.4 MB). Peak memory consumption was 44.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:17,046 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 48.2 MB. Free memory was 28.7 MB in the beginning and 28.6 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:37:17,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.82 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 22.1 MB in the beginning and 43.7 MB in the end (delta: -21.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:17,047 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.72 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 42.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:37:17,048 INFO L168 Benchmark]: Boogie Preprocessor took 33.34 ms. Allocated memory is still 60.8 MB. Free memory was 42.2 MB in the beginning and 41.2 MB in the end (delta: 938.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:37:17,048 INFO L168 Benchmark]: RCFGBuilder took 392.34 ms. Allocated memory is still 60.8 MB. Free memory was 41.0 MB in the beginning and 32.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:17,048 INFO L168 Benchmark]: TraceAbstraction took 73646.07 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 31.6 MB in the beginning and 27.2 MB in the end (delta: 4.4 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:17,048 INFO L168 Benchmark]: Witness Printer took 151.89 ms. Allocated memory is still 88.1 MB. Free memory was 27.2 MB in the beginning and 53.7 MB in the end (delta: -26.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:37:17,050 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 48.2 MB. Free memory was 28.7 MB in the beginning and 28.6 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 342.82 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 22.1 MB in the beginning and 43.7 MB in the end (delta: -21.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.72 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 42.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.34 ms. Allocated memory is still 60.8 MB. Free memory was 42.2 MB in the beginning and 41.2 MB in the end (delta: 938.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 392.34 ms. Allocated memory is still 60.8 MB. Free memory was 41.0 MB in the beginning and 32.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 73646.07 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 31.6 MB in the beginning and 27.2 MB in the end (delta: 4.4 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. * Witness Printer took 151.89 ms. Allocated memory is still 88.1 MB. Free memory was 27.2 MB in the beginning and 53.7 MB in the end (delta: -26.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND FALSE !(x < 99) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 73456.1ms, OverallIterations: 11, TraceHistogramMax: 50, EmptinessCheckTime: 27.8ms, AutomataDifference: 39516.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 59 SDtfs, 706 SDslu, 295 SDs, 0 SdLazy, 6145 SolverSat, 2028 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4233.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1502 GetRequests, 1063 SyntacticMatches, 1 SemanticMatches, 438 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5849 ImplicationChecksByTransitivity, 46917.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=236occurred in iteration=10, InterpolantAutomatonStates: 279, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 185.9ms AutomataMinimizationTime, 10 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 184.3ms SsaConstructionTime, 1175.5ms SatisfiabilityAnalysisTime, 22080.8ms InterpolantComputationTime, 810 NumberOfCodeBlocks, 810 NumberOfCodeBlocksAsserted, 198 NumberOfCheckSat, 1360 ConstructedInterpolants, 2 QuantifiedInterpolants, 7977 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1512 ConjunctsInSsa, 345 ConjunctsInUnsatCore, 48 InterpolantComputations, 6 PerfectInterpolantSequences, 35/11420 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 proved your program to be incorrect! [2021-10-13 07:37:17,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d992513f-cca2-405e-a1f7-a4eae357c24d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...