./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bcf02459061acfdf5a11fb9ee5e832193100590b0367d937f266d29520f326a3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:05:41,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:05:41,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:05:41,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:05:41,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:05:41,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:05:41,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:05:41,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:05:41,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:05:41,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:05:41,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:05:41,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:05:41,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:05:41,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:05:41,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:05:41,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:05:41,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:05:41,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:05:41,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:05:41,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:05:41,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:05:41,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:05:41,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:05:41,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:05:41,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:05:41,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:05:41,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:05:41,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:05:41,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:05:41,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:05:41,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:05:41,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:05:41,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:05:41,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:05:41,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:05:41,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:05:41,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:05:41,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:05:41,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:05:41,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:05:41,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:05:41,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:05:41,270 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:05:41,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:05:41,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:05:41,273 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:05:41,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:05:41,273 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:05:41,274 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:05:41,274 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:05:41,281 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:05:41,281 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:05:41,282 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:05:41,283 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:05:41,283 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:05:41,283 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:05:41,284 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:05:41,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:05:41,285 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:05:41,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:05:41,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:05:41,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:05:41,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:05:41,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:05:41,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:05:41,287 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:05:41,288 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:05:41,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:05:41,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:05:41,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:05:41,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:05:41,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:05:41,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:05:41,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:05:41,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:05:41,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:05:41,293 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:05:41,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:05:41,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:05:41,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:05:41,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:05:41,294 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_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcf02459061acfdf5a11fb9ee5e832193100590b0367d937f266d29520f326a3 [2021-11-07 01:05:41,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:05:41,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:05:41,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:05:41,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:05:41,609 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:05:41,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c [2021-11-07 01:05:41,684 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/data/5ba329948/f17425e6bc404c3d8376835b995fe088/FLAG3e7a8a423 [2021-11-07 01:05:42,352 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:05:42,353 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c [2021-11-07 01:05:42,375 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/data/5ba329948/f17425e6bc404c3d8376835b995fe088/FLAG3e7a8a423 [2021-11-07 01:05:42,505 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/data/5ba329948/f17425e6bc404c3d8376835b995fe088 [2021-11-07 01:05:42,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:05:42,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:05:42,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:05:42,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:05:42,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:05:42,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:05:42" (1/1) ... [2021-11-07 01:05:42,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b5ad07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:42, skipping insertion in model container [2021-11-07 01:05:42,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:05:42" (1/1) ... [2021-11-07 01:05:42,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:05:42,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:05:42,960 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_8f9c5d62-8d06-41ef-9782-13721a832603/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2021-11-07 01:05:43,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:05:43,287 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:05:43,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4688383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:43, skipping insertion in model container [2021-11-07 01:05:43,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:05:43,288 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:05:43,291 INFO L168 Benchmark]: Toolchain (without parser) took 780.51 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 49.7 MB in the beginning and 68.5 MB in the end (delta: -18.8 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:05:43,293 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 90.2 MB. Free memory was 69.2 MB in the beginning and 69.2 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:05:43,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 774.60 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 49.4 MB in the beginning and 68.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:05:43,298 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 90.2 MB. Free memory was 69.2 MB in the beginning and 69.2 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 774.60 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 49.4 MB in the beginning and 68.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bcf02459061acfdf5a11fb9ee5e832193100590b0367d937f266d29520f326a3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:05:45,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:05:45,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:05:45,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:05:45,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:05:45,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:05:45,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:05:45,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:05:45,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:05:45,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:05:45,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:05:45,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:05:45,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:05:45,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:05:45,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:05:45,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:05:45,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:05:45,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:05:45,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:05:45,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:05:45,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:05:45,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:05:45,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:05:45,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:05:45,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:05:45,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:05:45,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:05:45,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:05:45,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:05:45,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:05:45,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:05:45,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:05:45,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:05:45,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:05:45,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:05:45,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:05:45,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:05:45,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:05:45,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:05:45,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:05:45,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:05:45,822 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:05:45,847 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:05:45,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:05:45,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:05:45,849 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:05:45,849 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:05:45,849 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:05:45,850 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:05:45,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:05:45,850 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:05:45,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:05:45,851 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:05:45,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:05:45,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:05:45,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:05:45,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:05:45,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:05:45,853 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:05:45,853 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:05:45,853 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:05:45,853 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:05:45,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:05:45,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:05:45,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:05:45,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:05:45,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:05:45,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:05:45,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:05:45,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:05:45,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:05:45,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:05:45,856 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:05:45,856 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:05:45,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:05:45,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:05:45,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:05:45,857 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_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcf02459061acfdf5a11fb9ee5e832193100590b0367d937f266d29520f326a3 [2021-11-07 01:05:46,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:05:46,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:05:46,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:05:46,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:05:46,273 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:05:46,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c [2021-11-07 01:05:46,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/data/83f35bdfb/bc7fb218778645b3993b52d88b13232e/FLAGf940901e4 [2021-11-07 01:05:47,169 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:05:47,170 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c [2021-11-07 01:05:47,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/data/83f35bdfb/bc7fb218778645b3993b52d88b13232e/FLAGf940901e4 [2021-11-07 01:05:47,249 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/data/83f35bdfb/bc7fb218778645b3993b52d88b13232e [2021-11-07 01:05:47,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:05:47,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:05:47,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:05:47,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:05:47,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:05:47,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:05:47" (1/1) ... [2021-11-07 01:05:47,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510fd8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:47, skipping insertion in model container [2021-11-07 01:05:47,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:05:47" (1/1) ... [2021-11-07 01:05:47,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:05:47,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:05:47,646 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_8f9c5d62-8d06-41ef-9782-13721a832603/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2021-11-07 01:05:48,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:05:48,085 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:05:48,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:05:48,130 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_8f9c5d62-8d06-41ef-9782-13721a832603/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2021-11-07 01:05:48,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:05:48,250 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:05:48,291 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_8f9c5d62-8d06-41ef-9782-13721a832603/sv-benchmarks/c/product-lines/elevator_spec1_product24.cil.c[11232,11245] [2021-11-07 01:05:48,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:05:48,423 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:05:48,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48 WrapperNode [2021-11-07 01:05:48,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:05:48,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:05:48,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:05:48,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:05:48,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (1/1) ... [2021-11-07 01:05:48,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (1/1) ... [2021-11-07 01:05:49,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:05:49,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:05:49,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:05:49,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:05:49,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (1/1) ... [2021-11-07 01:05:49,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (1/1) ... [2021-11-07 01:05:49,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (1/1) ... [2021-11-07 01:05:49,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (1/1) ... [2021-11-07 01:05:49,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (1/1) ... [2021-11-07 01:05:49,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (1/1) ... [2021-11-07 01:05:49,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (1/1) ... [2021-11-07 01:05:49,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:05:49,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:05:49,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:05:49,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:05:49,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (1/1) ... [2021-11-07 01:05:49,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:05:49,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:05:49,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:05:50,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:05:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:05:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:05:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:05:50,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:06:08,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:06:08,779 INFO L299 CfgBuilder]: Removed 1577 assume(true) statements. [2021-11-07 01:06:08,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:06:08 BoogieIcfgContainer [2021-11-07 01:06:08,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:06:08,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:06:08,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:06:08,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:06:08,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:05:47" (1/3) ... [2021-11-07 01:06:08,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ceebf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:06:08, skipping insertion in model container [2021-11-07 01:06:08,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:05:48" (2/3) ... [2021-11-07 01:06:08,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ceebf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:06:08, skipping insertion in model container [2021-11-07 01:06:08,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:06:08" (3/3) ... [2021-11-07 01:06:08,801 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product24.cil.c [2021-11-07 01:06:08,808 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:06:08,808 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:06:08,899 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:06:08,907 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:06:08,908 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:06:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand has 6911 states, 6905 states have (on average 1.8896451846488052) internal successors, (13048), 6910 states have internal predecessors, (13048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:09,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:06:09,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:09,080 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:09,082 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:09,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1969331306, now seen corresponding path program 1 times [2021-11-07 01:06:09,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:09,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791374060] [2021-11-07 01:06:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:09,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:09,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:09,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:09,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:06:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:09,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:06:09,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:09,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:09,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:09,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791374060] [2021-11-07 01:06:09,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791374060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:09,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:09,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:06:09,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663990625] [2021-11-07 01:06:09,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:06:09,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:09,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:06:09,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:06:09,930 INFO L87 Difference]: Start difference. First operand has 6911 states, 6905 states have (on average 1.8896451846488052) internal successors, (13048), 6910 states have internal predecessors, (13048), 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 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:10,224 INFO L93 Difference]: Finished difference Result 6930 states and 13071 transitions. [2021-11-07 01:06:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:06:10,226 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 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 36 [2021-11-07 01:06:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:10,315 INFO L225 Difference]: With dead ends: 6930 [2021-11-07 01:06:10,316 INFO L226 Difference]: Without dead ends: 6907 [2021-11-07 01:06:10,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:06:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6907 states. [2021-11-07 01:06:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6907 to 6907. [2021-11-07 01:06:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6902 states have (on average 1.8887279049550856) internal successors, (13036), 6906 states have internal predecessors, (13036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 13036 transitions. [2021-11-07 01:06:10,830 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 13036 transitions. Word has length 36 [2021-11-07 01:06:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:10,832 INFO L470 AbstractCegarLoop]: Abstraction has 6907 states and 13036 transitions. [2021-11-07 01:06:10,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 13036 transitions. [2021-11-07 01:06:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:06:10,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:10,844 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:10,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:11,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:11,059 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:11,060 INFO L85 PathProgramCache]: Analyzing trace with hash 14762286, now seen corresponding path program 1 times [2021-11-07 01:06:11,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:11,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071027190] [2021-11-07 01:06:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:11,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:11,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:11,064 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:11,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:06:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:11,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:06:11,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:11,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:11,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:11,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071027190] [2021-11-07 01:06:11,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071027190] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:11,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:11,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:06:11,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719589872] [2021-11-07 01:06:11,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:11,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:11,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:11,820 INFO L87 Difference]: Start difference. First operand 6907 states and 13036 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:12,826 INFO L93 Difference]: Finished difference Result 20641 states and 38965 transitions. [2021-11-07 01:06:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:12,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 38 [2021-11-07 01:06:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:12,938 INFO L225 Difference]: With dead ends: 20641 [2021-11-07 01:06:12,938 INFO L226 Difference]: Without dead ends: 13747 [2021-11-07 01:06:12,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13747 states. [2021-11-07 01:06:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13747 to 6907. [2021-11-07 01:06:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6902 states have (on average 1.887713706172124) internal successors, (13029), 6906 states have internal predecessors, (13029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 13029 transitions. [2021-11-07 01:06:13,360 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 13029 transitions. Word has length 38 [2021-11-07 01:06:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:13,360 INFO L470 AbstractCegarLoop]: Abstraction has 6907 states and 13029 transitions. [2021-11-07 01:06:13,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 13029 transitions. [2021-11-07 01:06:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:06:13,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:13,364 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:13,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:13,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:13,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:13,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:13,580 INFO L85 PathProgramCache]: Analyzing trace with hash 93579505, now seen corresponding path program 1 times [2021-11-07 01:06:13,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:13,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752442328] [2021-11-07 01:06:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:13,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:13,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:13,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:13,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:06:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:14,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:06:14,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:14,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:14,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:14,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752442328] [2021-11-07 01:06:14,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752442328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:14,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:14,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:06:14,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448874733] [2021-11-07 01:06:14,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:06:14,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:14,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:06:14,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:06:14,308 INFO L87 Difference]: Start difference. First operand 6907 states and 13029 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:17,357 INFO L93 Difference]: Finished difference Result 47824 states and 90255 transitions. [2021-11-07 01:06:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:06:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 44 [2021-11-07 01:06:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:17,570 INFO L225 Difference]: With dead ends: 47824 [2021-11-07 01:06:17,570 INFO L226 Difference]: Without dead ends: 40939 [2021-11-07 01:06:17,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:06:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40939 states. [2021-11-07 01:06:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40939 to 6885. [2021-11-07 01:06:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 6880 states have (on average 1.8863372093023256) internal successors, (12978), 6884 states have internal predecessors, (12978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 12978 transitions. [2021-11-07 01:06:18,380 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 12978 transitions. Word has length 44 [2021-11-07 01:06:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:18,381 INFO L470 AbstractCegarLoop]: Abstraction has 6885 states and 12978 transitions. [2021-11-07 01:06:18,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 12978 transitions. [2021-11-07 01:06:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:06:18,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:18,386 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:18,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:18,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:18,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:18,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:18,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1637914544, now seen corresponding path program 1 times [2021-11-07 01:06:18,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:18,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450456761] [2021-11-07 01:06:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:18,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:18,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:18,612 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:18,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:06:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:06:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:19,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:19,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:19,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450456761] [2021-11-07 01:06:19,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450456761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:19,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:19,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:06:19,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336997515] [2021-11-07 01:06:19,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:19,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:19,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:19,398 INFO L87 Difference]: Start difference. First operand 6885 states and 12978 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:20,259 INFO L93 Difference]: Finished difference Result 20552 states and 38769 transitions. [2021-11-07 01:06:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:20,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 46 [2021-11-07 01:06:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:20,434 INFO L225 Difference]: With dead ends: 20552 [2021-11-07 01:06:20,435 INFO L226 Difference]: Without dead ends: 13689 [2021-11-07 01:06:20,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13689 states. [2021-11-07 01:06:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13689 to 6885. [2021-11-07 01:06:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 6880 states have (on average 1.8847383720930233) internal successors, (12967), 6884 states have internal predecessors, (12967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 12967 transitions. [2021-11-07 01:06:20,976 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 12967 transitions. Word has length 46 [2021-11-07 01:06:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:20,977 INFO L470 AbstractCegarLoop]: Abstraction has 6885 states and 12967 transitions. [2021-11-07 01:06:20,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 12967 transitions. [2021-11-07 01:06:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:06:20,979 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:20,979 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:21,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:21,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:21,201 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:21,201 INFO L85 PathProgramCache]: Analyzing trace with hash -415086917, now seen corresponding path program 1 times [2021-11-07 01:06:21,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:21,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097612598] [2021-11-07 01:06:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:21,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:21,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:21,204 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:21,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:06:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:06:21,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:21,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:22,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:22,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097612598] [2021-11-07 01:06:22,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097612598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:22,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:22,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:06:22,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082276311] [2021-11-07 01:06:22,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:06:22,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:22,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:06:22,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:06:22,110 INFO L87 Difference]: Start difference. First operand 6885 states and 12967 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2021-11-07 01:06:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:26,508 INFO L93 Difference]: Finished difference Result 74979 states and 141471 transitions. [2021-11-07 01:06:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:06:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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 52 [2021-11-07 01:06:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:26,810 INFO L225 Difference]: With dead ends: 74979 [2021-11-07 01:06:26,810 INFO L226 Difference]: Without dead ends: 68119 [2021-11-07 01:06:26,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:06:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68119 states. [2021-11-07 01:06:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68119 to 6887. [2021-11-07 01:06:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6887 states, 6882 states have (on average 1.8837547224643998) internal successors, (12964), 6886 states have internal predecessors, (12964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6887 states to 6887 states and 12964 transitions. [2021-11-07 01:06:27,876 INFO L78 Accepts]: Start accepts. Automaton has 6887 states and 12964 transitions. Word has length 52 [2021-11-07 01:06:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:27,876 INFO L470 AbstractCegarLoop]: Abstraction has 6887 states and 12964 transitions. [2021-11-07 01:06:27,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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) [2021-11-07 01:06:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 6887 states and 12964 transitions. [2021-11-07 01:06:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:06:27,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:27,878 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:27,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:28,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:28,095 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2081139976, now seen corresponding path program 1 times [2021-11-07 01:06:28,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:28,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474653490] [2021-11-07 01:06:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:28,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:28,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:28,098 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:28,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:06:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:06:28,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:28,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:28,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:28,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474653490] [2021-11-07 01:06:28,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474653490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:28,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:28,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:06:28,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680506560] [2021-11-07 01:06:28,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:06:28,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:06:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:06:28,950 INFO L87 Difference]: Start difference. First operand 6887 states and 12964 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:33,502 INFO L93 Difference]: Finished difference Result 74947 states and 141392 transitions. [2021-11-07 01:06:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:06:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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 54 [2021-11-07 01:06:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:33,658 INFO L225 Difference]: With dead ends: 74947 [2021-11-07 01:06:33,658 INFO L226 Difference]: Without dead ends: 68087 [2021-11-07 01:06:33,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:06:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68087 states. [2021-11-07 01:06:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68087 to 6891. [2021-11-07 01:06:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6891 states, 6886 states have (on average 1.8830961370897472) internal successors, (12967), 6890 states have internal predecessors, (12967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6891 states to 6891 states and 12967 transitions. [2021-11-07 01:06:34,418 INFO L78 Accepts]: Start accepts. Automaton has 6891 states and 12967 transitions. Word has length 54 [2021-11-07 01:06:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:34,418 INFO L470 AbstractCegarLoop]: Abstraction has 6891 states and 12967 transitions. [2021-11-07 01:06:34,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6891 states and 12967 transitions. [2021-11-07 01:06:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:06:34,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:34,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:34,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 01:06:34,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:34,636 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1039252933, now seen corresponding path program 1 times [2021-11-07 01:06:34,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:34,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796899860] [2021-11-07 01:06:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:34,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:34,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:34,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:34,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:06:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:35,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:06:35,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:35,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:35,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:35,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796899860] [2021-11-07 01:06:35,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796899860] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:35,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:35,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:06:35,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548655088] [2021-11-07 01:06:35,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:35,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:35,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:35,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:35,556 INFO L87 Difference]: Start difference. First operand 6891 states and 12967 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:35,970 INFO L93 Difference]: Finished difference Result 13730 states and 25865 transitions. [2021-11-07 01:06:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:35,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 [2021-11-07 01:06:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:35,980 INFO L225 Difference]: With dead ends: 13730 [2021-11-07 01:06:35,981 INFO L226 Difference]: Without dead ends: 6870 [2021-11-07 01:06:35,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6870 states. [2021-11-07 01:06:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6870 to 6870. [2021-11-07 01:06:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6870 states, 6865 states have (on average 1.883321194464676) internal successors, (12929), 6869 states have internal predecessors, (12929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6870 states to 6870 states and 12929 transitions. [2021-11-07 01:06:36,667 INFO L78 Accepts]: Start accepts. Automaton has 6870 states and 12929 transitions. Word has length 56 [2021-11-07 01:06:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:36,668 INFO L470 AbstractCegarLoop]: Abstraction has 6870 states and 12929 transitions. [2021-11-07 01:06:36,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:36,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6870 states and 12929 transitions. [2021-11-07 01:06:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:06:36,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:36,670 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:36,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:06:36,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:36,885 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:36,885 INFO L85 PathProgramCache]: Analyzing trace with hash -296292637, now seen corresponding path program 1 times [2021-11-07 01:06:36,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:36,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092116354] [2021-11-07 01:06:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:36,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:36,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:36,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:06:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:37,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:06:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:37,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:37,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:37,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092116354] [2021-11-07 01:06:37,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092116354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:37,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:37,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:06:37,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664176202] [2021-11-07 01:06:37,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:06:37,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:37,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:06:37,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:06:37,582 INFO L87 Difference]: Start difference. First operand 6870 states and 12929 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:37,930 INFO L93 Difference]: Finished difference Result 13674 states and 25768 transitions. [2021-11-07 01:06:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 57 [2021-11-07 01:06:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:37,941 INFO L225 Difference]: With dead ends: 13674 [2021-11-07 01:06:37,941 INFO L226 Difference]: Without dead ends: 6845 [2021-11-07 01:06:37,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:06:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2021-11-07 01:06:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6845. [2021-11-07 01:06:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6845 states, 6840 states have (on average 1.8837719298245614) internal successors, (12885), 6844 states have internal predecessors, (12885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6845 states to 6845 states and 12885 transitions. [2021-11-07 01:06:38,374 INFO L78 Accepts]: Start accepts. Automaton has 6845 states and 12885 transitions. Word has length 57 [2021-11-07 01:06:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:38,374 INFO L470 AbstractCegarLoop]: Abstraction has 6845 states and 12885 transitions. [2021-11-07 01:06:38,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 6845 states and 12885 transitions. [2021-11-07 01:06:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:06:38,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:38,376 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:38,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 01:06:38,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:38,591 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1306553900, now seen corresponding path program 1 times [2021-11-07 01:06:38,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:38,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166633668] [2021-11-07 01:06:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:38,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:38,593 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:38,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:06:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:39,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:06:39,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:39,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:39,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:39,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166633668] [2021-11-07 01:06:39,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166633668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:39,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:39,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:06:39,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339770576] [2021-11-07 01:06:39,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:39,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:39,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:39,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:39,350 INFO L87 Difference]: Start difference. First operand 6845 states and 12885 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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) [2021-11-07 01:06:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:39,742 INFO L93 Difference]: Finished difference Result 13649 states and 25724 transitions. [2021-11-07 01:06:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:39,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 58 [2021-11-07 01:06:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:39,751 INFO L225 Difference]: With dead ends: 13649 [2021-11-07 01:06:39,751 INFO L226 Difference]: Without dead ends: 6842 [2021-11-07 01:06:39,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2021-11-07 01:06:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 6842. [2021-11-07 01:06:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6837 states have (on average 1.883428404270879) internal successors, (12877), 6841 states have internal predecessors, (12877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 12877 transitions. [2021-11-07 01:06:40,118 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 12877 transitions. Word has length 58 [2021-11-07 01:06:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:40,119 INFO L470 AbstractCegarLoop]: Abstraction has 6842 states and 12877 transitions. [2021-11-07 01:06:40,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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) [2021-11-07 01:06:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 12877 transitions. [2021-11-07 01:06:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:06:40,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:40,120 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:40,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:40,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:40,321 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:40,321 INFO L85 PathProgramCache]: Analyzing trace with hash -172510179, now seen corresponding path program 1 times [2021-11-07 01:06:40,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:40,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554756231] [2021-11-07 01:06:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:40,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:40,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:40,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:40,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:06:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:40,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:06:40,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:40,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:41,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:41,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554756231] [2021-11-07 01:06:41,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554756231] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:41,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:41,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:06:41,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314848800] [2021-11-07 01:06:41,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:06:41,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:06:41,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:06:41,091 INFO L87 Difference]: Start difference. First operand 6842 states and 12877 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:41,567 INFO L93 Difference]: Finished difference Result 13640 states and 25706 transitions. [2021-11-07 01:06:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:06:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 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 59 [2021-11-07 01:06:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:41,578 INFO L225 Difference]: With dead ends: 13640 [2021-11-07 01:06:41,578 INFO L226 Difference]: Without dead ends: 6840 [2021-11-07 01:06:41,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:06:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6840 states. [2021-11-07 01:06:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6840 to 6840. [2021-11-07 01:06:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6835 states have (on average 1.8831016825164595) internal successors, (12871), 6839 states have internal predecessors, (12871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 12871 transitions. [2021-11-07 01:06:42,047 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 12871 transitions. Word has length 59 [2021-11-07 01:06:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:42,047 INFO L470 AbstractCegarLoop]: Abstraction has 6840 states and 12871 transitions. [2021-11-07 01:06:42,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 12871 transitions. [2021-11-07 01:06:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:06:42,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:42,049 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:42,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:42,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:42,263 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:42,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash -486906799, now seen corresponding path program 1 times [2021-11-07 01:06:42,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:42,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256412165] [2021-11-07 01:06:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:42,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:42,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:42,266 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:42,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:06:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:42,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:06:42,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:43,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:43,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:43,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256412165] [2021-11-07 01:06:43,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256412165] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:43,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:43,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:06:43,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665586340] [2021-11-07 01:06:43,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:06:43,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:43,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:06:43,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:06:43,224 INFO L87 Difference]: Start difference. First operand 6840 states and 12871 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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) [2021-11-07 01:06:43,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:43,836 INFO L93 Difference]: Finished difference Result 13633 states and 25691 transitions. [2021-11-07 01:06:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:06:43,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 60 [2021-11-07 01:06:43,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:43,847 INFO L225 Difference]: With dead ends: 13633 [2021-11-07 01:06:43,847 INFO L226 Difference]: Without dead ends: 6838 [2021-11-07 01:06:43,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:06:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2021-11-07 01:06:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 6838. [2021-11-07 01:06:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6833 states have (on average 1.8827747695009514) internal successors, (12865), 6837 states have internal predecessors, (12865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 12865 transitions. [2021-11-07 01:06:44,237 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 12865 transitions. Word has length 60 [2021-11-07 01:06:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:44,238 INFO L470 AbstractCegarLoop]: Abstraction has 6838 states and 12865 transitions. [2021-11-07 01:06:44,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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) [2021-11-07 01:06:44,238 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 12865 transitions. [2021-11-07 01:06:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:06:44,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:44,239 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:44,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:44,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:44,439 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:44,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2090471378, now seen corresponding path program 1 times [2021-11-07 01:06:44,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:44,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462912712] [2021-11-07 01:06:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:44,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:44,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:44,441 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:44,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:06:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:44,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:06:44,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:45,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:45,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:45,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462912712] [2021-11-07 01:06:45,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462912712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:45,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:45,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:06:45,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313399499] [2021-11-07 01:06:45,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:06:45,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:06:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:45,692 INFO L87 Difference]: Start difference. First operand 6838 states and 12865 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:47,419 INFO L93 Difference]: Finished difference Result 17824 states and 33600 transitions. [2021-11-07 01:06:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:06:47,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 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 61 [2021-11-07 01:06:47,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:47,442 INFO L225 Difference]: With dead ends: 17824 [2021-11-07 01:06:47,442 INFO L226 Difference]: Without dead ends: 14373 [2021-11-07 01:06:47,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:06:47,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14373 states. [2021-11-07 01:06:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14373 to 8980. [2021-11-07 01:06:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8980 states, 8975 states have (on average 1.8843454038997214) internal successors, (16912), 8979 states have internal predecessors, (16912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:47,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8980 states to 8980 states and 16912 transitions. [2021-11-07 01:06:47,969 INFO L78 Accepts]: Start accepts. Automaton has 8980 states and 16912 transitions. Word has length 61 [2021-11-07 01:06:47,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:47,969 INFO L470 AbstractCegarLoop]: Abstraction has 8980 states and 16912 transitions. [2021-11-07 01:06:47,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 8980 states and 16912 transitions. [2021-11-07 01:06:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:06:47,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:47,983 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:48,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:48,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:48,198 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash -873239124, now seen corresponding path program 1 times [2021-11-07 01:06:48,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:48,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105772722] [2021-11-07 01:06:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:48,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:48,201 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:48,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:06:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:48,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:06:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:49,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:49,246 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:49,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105772722] [2021-11-07 01:06:49,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105772722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:49,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:49,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:06:49,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240841748] [2021-11-07 01:06:49,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:06:49,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:06:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:06:49,248 INFO L87 Difference]: Start difference. First operand 8980 states and 16912 transitions. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:50,145 INFO L93 Difference]: Finished difference Result 16830 states and 31502 transitions. [2021-11-07 01:06:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:06:50,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 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 80 [2021-11-07 01:06:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:50,157 INFO L225 Difference]: With dead ends: 16830 [2021-11-07 01:06:50,157 INFO L226 Difference]: Without dead ends: 9049 [2021-11-07 01:06:50,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:06:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9049 states. [2021-11-07 01:06:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9049 to 6299. [2021-11-07 01:06:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 6294 states have (on average 1.8767079758500158) internal successors, (11812), 6298 states have internal predecessors, (11812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 11812 transitions. [2021-11-07 01:06:50,468 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 11812 transitions. Word has length 80 [2021-11-07 01:06:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:50,468 INFO L470 AbstractCegarLoop]: Abstraction has 6299 states and 11812 transitions. [2021-11-07 01:06:50,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 11812 transitions. [2021-11-07 01:06:50,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:06:50,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:50,471 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:50,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:50,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:50,672 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:50,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2086058312, now seen corresponding path program 1 times [2021-11-07 01:06:50,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:50,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139060464] [2021-11-07 01:06:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:50,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:50,676 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:50,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:06:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:51,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:06:51,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:51,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:51,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:51,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139060464] [2021-11-07 01:06:51,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139060464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:51,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:51,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:06:51,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525808858] [2021-11-07 01:06:51,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:06:51,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:51,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:06:51,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:06:51,747 INFO L87 Difference]: Start difference. First operand 6299 states and 11812 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:57,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:57,080 INFO L93 Difference]: Finished difference Result 21909 states and 41156 transitions. [2021-11-07 01:06:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:06:57,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 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 81 [2021-11-07 01:06:57,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:57,104 INFO L225 Difference]: With dead ends: 21909 [2021-11-07 01:06:57,105 INFO L226 Difference]: Without dead ends: 15664 [2021-11-07 01:06:57,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:06:57,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15664 states. [2021-11-07 01:06:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15664 to 6299. [2021-11-07 01:06:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 6294 states have (on average 1.819192882109946) internal successors, (11450), 6298 states have internal predecessors, (11450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 11450 transitions. [2021-11-07 01:06:57,541 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 11450 transitions. Word has length 81 [2021-11-07 01:06:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:57,541 INFO L470 AbstractCegarLoop]: Abstraction has 6299 states and 11450 transitions. [2021-11-07 01:06:57,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 11450 transitions. [2021-11-07 01:06:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:06:57,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:57,546 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:06:57,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:57,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:57,762 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:06:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1485476940, now seen corresponding path program 1 times [2021-11-07 01:06:57,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:57,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838176909] [2021-11-07 01:06:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:57,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:57,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:57,766 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:57,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:06:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:58,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:06:58,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:58,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:59,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:59,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838176909] [2021-11-07 01:06:59,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838176909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:59,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:59,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:06:59,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974497264] [2021-11-07 01:06:59,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:06:59,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:59,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:06:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:06:59,077 INFO L87 Difference]: Start difference. First operand 6299 states and 11450 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:02,989 INFO L93 Difference]: Finished difference Result 17173 states and 31528 transitions. [2021-11-07 01:07:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:07:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 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 89 [2021-11-07 01:07:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:03,005 INFO L225 Difference]: With dead ends: 17173 [2021-11-07 01:07:03,006 INFO L226 Difference]: Without dead ends: 10955 [2021-11-07 01:07:03,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:07:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2021-11-07 01:07:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 6195. [2021-11-07 01:07:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6195 states, 6190 states have (on average 1.820032310177706) internal successors, (11266), 6194 states have internal predecessors, (11266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6195 states to 6195 states and 11266 transitions. [2021-11-07 01:07:03,566 INFO L78 Accepts]: Start accepts. Automaton has 6195 states and 11266 transitions. Word has length 89 [2021-11-07 01:07:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:03,567 INFO L470 AbstractCegarLoop]: Abstraction has 6195 states and 11266 transitions. [2021-11-07 01:07:03,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 6195 states and 11266 transitions. [2021-11-07 01:07:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:07:03,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:03,572 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:07:03,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:07:03,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:03,789 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:07:03,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:03,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1075979457, now seen corresponding path program 1 times [2021-11-07 01:07:03,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:03,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257045493] [2021-11-07 01:07:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:03,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:03,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:03,792 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:03,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:07:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:07:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:05,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:07,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:07,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257045493] [2021-11-07 01:07:07,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257045493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:07,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:07,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:07:07,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628698437] [2021-11-07 01:07:07,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:07:07,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:07:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:07:07,419 INFO L87 Difference]: Start difference. First operand 6195 states and 11266 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:13,822 INFO L93 Difference]: Finished difference Result 19676 states and 35819 transitions. [2021-11-07 01:07:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:07:13,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 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 92 [2021-11-07 01:07:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:13,849 INFO L225 Difference]: With dead ends: 19676 [2021-11-07 01:07:13,849 INFO L226 Difference]: Without dead ends: 13554 [2021-11-07 01:07:13,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:07:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13554 states. [2021-11-07 01:07:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13554 to 8642. [2021-11-07 01:07:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 8637 states have (on average 1.80791941646405) internal successors, (15615), 8641 states have internal predecessors, (15615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 15615 transitions. [2021-11-07 01:07:14,674 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 15615 transitions. Word has length 92 [2021-11-07 01:07:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:14,674 INFO L470 AbstractCegarLoop]: Abstraction has 8642 states and 15615 transitions. [2021-11-07 01:07:14,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 15615 transitions. [2021-11-07 01:07:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:07:14,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:14,679 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:07:14,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:07:14,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:14,885 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:07:14,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:14,886 INFO L85 PathProgramCache]: Analyzing trace with hash 466550272, now seen corresponding path program 1 times [2021-11-07 01:07:14,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:14,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762894020] [2021-11-07 01:07:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:14,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:14,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:14,888 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:14,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:07:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:15,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:07:15,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:16,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:16,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:16,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762894020] [2021-11-07 01:07:16,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762894020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:16,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:16,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:07:16,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610614022] [2021-11-07 01:07:16,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:07:16,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:16,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:07:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:07:16,329 INFO L87 Difference]: Start difference. First operand 8642 states and 15615 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:22,743 INFO L93 Difference]: Finished difference Result 34232 states and 62323 transitions. [2021-11-07 01:07:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:07:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 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 93 [2021-11-07 01:07:22,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:22,785 INFO L225 Difference]: With dead ends: 34232 [2021-11-07 01:07:22,785 INFO L226 Difference]: Without dead ends: 25662 [2021-11-07 01:07:22,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:07:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25662 states. [2021-11-07 01:07:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25662 to 8656. [2021-11-07 01:07:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8651 states have (on average 1.806611952375448) internal successors, (15629), 8655 states have internal predecessors, (15629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 15629 transitions. [2021-11-07 01:07:23,462 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 15629 transitions. Word has length 93 [2021-11-07 01:07:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:23,462 INFO L470 AbstractCegarLoop]: Abstraction has 8656 states and 15629 transitions. [2021-11-07 01:07:23,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 15629 transitions. [2021-11-07 01:07:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:07:23,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:23,465 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:07:23,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:07:23,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:23,680 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:07:23,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:23,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1092935519, now seen corresponding path program 1 times [2021-11-07 01:07:23,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:23,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924327132] [2021-11-07 01:07:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:23,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:23,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:23,682 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:23,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:07:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:24,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:07:24,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:24,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:24,875 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:24,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924327132] [2021-11-07 01:07:24,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924327132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:24,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:24,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:07:24,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289328099] [2021-11-07 01:07:24,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:07:24,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:07:24,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:07:24,878 INFO L87 Difference]: Start difference. First operand 8656 states and 15629 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:34,236 INFO L93 Difference]: Finished difference Result 26664 states and 48524 transitions. [2021-11-07 01:07:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:07:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 94 [2021-11-07 01:07:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:34,266 INFO L225 Difference]: With dead ends: 26664 [2021-11-07 01:07:34,266 INFO L226 Difference]: Without dead ends: 19612 [2021-11-07 01:07:34,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:07:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19612 states. [2021-11-07 01:07:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19612 to 14948. [2021-11-07 01:07:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14948 states, 14943 states have (on average 1.8086729572375024) internal successors, (27027), 14947 states have internal predecessors, (27027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14948 states to 14948 states and 27027 transitions. [2021-11-07 01:07:35,623 INFO L78 Accepts]: Start accepts. Automaton has 14948 states and 27027 transitions. Word has length 94 [2021-11-07 01:07:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:35,624 INFO L470 AbstractCegarLoop]: Abstraction has 14948 states and 27027 transitions. [2021-11-07 01:07:35,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 14948 states and 27027 transitions. [2021-11-07 01:07:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:07:35,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:35,628 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:07:35,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:07:35,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:35,834 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:07:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash 81818269, now seen corresponding path program 1 times [2021-11-07 01:07:35,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:35,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159955194] [2021-11-07 01:07:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:35,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:35,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:35,836 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:35,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:07:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:36,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:07:36,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:36,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:37,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:37,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159955194] [2021-11-07 01:07:37,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159955194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:37,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:37,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:07:37,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322847453] [2021-11-07 01:07:37,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:07:37,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:07:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:07:37,183 INFO L87 Difference]: Start difference. First operand 14948 states and 27027 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:42,778 INFO L93 Difference]: Finished difference Result 33688 states and 61167 transitions. [2021-11-07 01:07:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:07:42,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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 94 [2021-11-07 01:07:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:42,810 INFO L225 Difference]: With dead ends: 33688 [2021-11-07 01:07:42,810 INFO L226 Difference]: Without dead ends: 20329 [2021-11-07 01:07:42,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:07:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20329 states. [2021-11-07 01:07:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20329 to 15465. [2021-11-07 01:07:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15465 states, 15460 states have (on average 1.7811125485122898) internal successors, (27536), 15464 states have internal predecessors, (27536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15465 states to 15465 states and 27536 transitions. [2021-11-07 01:07:43,957 INFO L78 Accepts]: Start accepts. Automaton has 15465 states and 27536 transitions. Word has length 94 [2021-11-07 01:07:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:43,957 INFO L470 AbstractCegarLoop]: Abstraction has 15465 states and 27536 transitions. [2021-11-07 01:07:43,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 15465 states and 27536 transitions. [2021-11-07 01:07:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:07:43,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:43,959 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:07:43,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:07:44,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:44,175 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:07:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:44,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1364650153, now seen corresponding path program 1 times [2021-11-07 01:07:44,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:44,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087677049] [2021-11-07 01:07:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:44,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:44,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:44,177 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:44,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:07:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:07:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:45,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:45,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:45,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087677049] [2021-11-07 01:07:45,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087677049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:45,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:45,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:07:45,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675079073] [2021-11-07 01:07:45,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:07:45,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:07:45,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:07:45,609 INFO L87 Difference]: Start difference. First operand 15465 states and 27536 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:52,826 INFO L93 Difference]: Finished difference Result 109151 states and 195877 transitions. [2021-11-07 01:07:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:07:52,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 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 96 [2021-11-07 01:07:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:52,987 INFO L225 Difference]: With dead ends: 109151 [2021-11-07 01:07:52,987 INFO L226 Difference]: Without dead ends: 93754 [2021-11-07 01:07:53,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:07:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93754 states. [2021-11-07 01:07:55,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93754 to 24842. [2021-11-07 01:07:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24842 states, 24837 states have (on average 1.7898699520876111) internal successors, (44455), 24841 states have internal predecessors, (44455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24842 states to 24842 states and 44455 transitions. [2021-11-07 01:07:55,821 INFO L78 Accepts]: Start accepts. Automaton has 24842 states and 44455 transitions. Word has length 96 [2021-11-07 01:07:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:55,822 INFO L470 AbstractCegarLoop]: Abstraction has 24842 states and 44455 transitions. [2021-11-07 01:07:55,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 24842 states and 44455 transitions. [2021-11-07 01:07:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 01:07:55,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:55,826 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:07:55,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:07:56,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:56,046 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:07:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:56,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1437036711, now seen corresponding path program 1 times [2021-11-07 01:07:56,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:56,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876470258] [2021-11-07 01:07:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:56,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:56,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:56,049 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:56,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:07:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:56,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:07:56,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:57,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:07:57,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:57,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876470258] [2021-11-07 01:07:57,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876470258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:57,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:57,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:07:57,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784490520] [2021-11-07 01:07:57,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:07:57,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:57,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:07:57,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:07:57,526 INFO L87 Difference]: Start difference. First operand 24842 states and 44455 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:02,983 INFO L93 Difference]: Finished difference Result 60842 states and 109808 transitions. [2021-11-07 01:08:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:08:02,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 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 96 [2021-11-07 01:08:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:03,035 INFO L225 Difference]: With dead ends: 60842 [2021-11-07 01:08:03,036 INFO L226 Difference]: Without dead ends: 41377 [2021-11-07 01:08:03,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:08:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41377 states. [2021-11-07 01:08:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41377 to 24807. [2021-11-07 01:08:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24807 states, 24802 states have (on average 1.7895734214982664) internal successors, (44385), 24806 states have internal predecessors, (44385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24807 states to 24807 states and 44385 transitions. [2021-11-07 01:08:05,189 INFO L78 Accepts]: Start accepts. Automaton has 24807 states and 44385 transitions. Word has length 96 [2021-11-07 01:08:05,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:05,190 INFO L470 AbstractCegarLoop]: Abstraction has 24807 states and 44385 transitions. [2021-11-07 01:08:05,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 24807 states and 44385 transitions. [2021-11-07 01:08:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:08:05,192 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:05,193 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:08:05,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:05,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:05,393 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:08:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1058170643, now seen corresponding path program 1 times [2021-11-07 01:08:05,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:05,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921143630] [2021-11-07 01:08:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:05,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:05,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:05,396 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:05,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f9c5d62-8d06-41ef-9782-13721a832603/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:08:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:08:06,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:06,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:07,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:07,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921143630] [2021-11-07 01:08:07,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921143630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:07,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:07,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:08:07,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912985974] [2021-11-07 01:08:07,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:08:07,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:08:07,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:08:07,185 INFO L87 Difference]: Start difference. First operand 24807 states and 44385 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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)