./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:57:12,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:57:12,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:57:12,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:57:12,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:57:12,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:57:12,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:57:12,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:57:12,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:57:12,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:57:12,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:57:12,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:57:12,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:57:12,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:57:12,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:57:12,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:57:12,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:57:12,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:57:12,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:57:12,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:57:12,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:57:12,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:57:12,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:57:12,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:57:12,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:57:12,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:57:12,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:57:12,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:57:12,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:57:12,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:57:12,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:57:12,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:57:12,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:57:12,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:57:12,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:57:12,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:57:12,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:57:12,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:57:12,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:57:12,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:57:12,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:57:12,249 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:57:12,294 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:57:12,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:57:12,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:57:12,296 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:57:12,297 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:57:12,297 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:57:12,297 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:57:12,297 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:57:12,304 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:57:12,305 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:57:12,306 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:57:12,306 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:57:12,307 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:57:12,307 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:57:12,307 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:57:12,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:57:12,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:57:12,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:57:12,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:57:12,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:57:12,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:57:12,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:57:12,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:57:12,311 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:57:12,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:57:12,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:57:12,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:57:12,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:57:12,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:57:12,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:57:12,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:57:12,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:57:12,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:57:12,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:57:12,316 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:57:12,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:57:12,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:57:12,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:57:12,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:57:12,317 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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2021-11-07 00:57:12,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:57:12,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:57:12,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:57:12,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:57:12,636 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:57:12,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-07 00:57:12,696 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/data/5759f8657/bf95e77777e94af08b15e1072831de70/FLAGa0f4bca27 [2021-11-07 00:57:13,383 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:57:13,384 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-07 00:57:13,420 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/data/5759f8657/bf95e77777e94af08b15e1072831de70/FLAGa0f4bca27 [2021-11-07 00:57:13,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/data/5759f8657/bf95e77777e94af08b15e1072831de70 [2021-11-07 00:57:13,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:57:13,519 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:57:13,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:13,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:57:13,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:57:13,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:13" (1/1) ... [2021-11-07 00:57:13,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab7a69a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:13, skipping insertion in model container [2021-11-07 00:57:13,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:13" (1/1) ... [2021-11-07 00:57:13,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:57:13,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:57:14,264 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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-07 00:57:14,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:14,285 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 00:57:14,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78f43857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:14, skipping insertion in model container [2021-11-07 00:57:14,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:14,286 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:57:14,288 INFO L168 Benchmark]: Toolchain (without parser) took 767.98 ms. Allocated memory is still 92.3 MB. Free memory was 69.2 MB in the beginning and 54.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 00:57:14,289 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 70.1 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:57:14,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 763.49 ms. Allocated memory is still 92.3 MB. Free memory was 68.8 MB in the beginning and 54.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 00:57:14,291 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 70.1 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 763.49 ms. Allocated memory is still 92.3 MB. Free memory was 68.8 MB in the beginning and 54.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1963]: 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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:57:16,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:57:16,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:57:16,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:57:16,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:57:16,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:57:16,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:57:16,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:57:16,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:57:16,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:57:16,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:57:16,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:57:16,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:57:16,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:57:16,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:57:16,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:57:16,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:57:16,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:57:16,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:57:16,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:57:16,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:57:16,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:57:16,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:57:16,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:57:16,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:57:16,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:57:16,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:57:16,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:57:16,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:57:16,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:57:16,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:57:16,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:57:16,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:57:16,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:57:16,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:57:16,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:57:16,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:57:16,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:57:16,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:57:16,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:57:16,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:57:16,683 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:57:16,725 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:57:16,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:57:16,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:57:16,727 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:57:16,728 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:57:16,728 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:57:16,728 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:57:16,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:57:16,728 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:57:16,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:57:16,731 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:57:16,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:57:16,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:57:16,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:57:16,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:57:16,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:57:16,733 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:57:16,733 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:57:16,733 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:57:16,733 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:57:16,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:57:16,734 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:57:16,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:57:16,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:57:16,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:57:16,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:57:16,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:57:16,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:57:16,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:57:16,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:57:16,735 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:57:16,736 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:16,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:57:16,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:57:16,737 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:57:16,737 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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2021-11-07 00:57:17,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:57:17,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:57:17,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:57:17,198 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:57:17,199 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:57:17,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-07 00:57:17,263 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/data/f7fd9930c/4aa874d4fe3346c7a6e13c41cfc3e913/FLAG54ba7ffba [2021-11-07 00:57:17,982 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:57:17,983 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-07 00:57:18,017 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/data/f7fd9930c/4aa874d4fe3346c7a6e13c41cfc3e913/FLAG54ba7ffba [2021-11-07 00:57:18,134 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/data/f7fd9930c/4aa874d4fe3346c7a6e13c41cfc3e913 [2021-11-07 00:57:18,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:57:18,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:57:18,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:18,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:57:18,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:57:18,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:18" (1/1) ... [2021-11-07 00:57:18,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8586a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:18, skipping insertion in model container [2021-11-07 00:57:18,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:18" (1/1) ... [2021-11-07 00:57:18,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:57:18,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:57:18,940 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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-07 00:57:18,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:18,971 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:57:18,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:57:19,162 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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-07 00:57:19,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:19,182 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:57:19,263 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_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-07 00:57:19,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:19,305 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:57:19,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19 WrapperNode [2021-11-07 00:57:19,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:19,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:57:19,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:57:19,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:57:19,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (1/1) ... [2021-11-07 00:57:19,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (1/1) ... [2021-11-07 00:57:19,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:57:19,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:57:19,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:57:19,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:57:19,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (1/1) ... [2021-11-07 00:57:19,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (1/1) ... [2021-11-07 00:57:19,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (1/1) ... [2021-11-07 00:57:19,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (1/1) ... [2021-11-07 00:57:19,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (1/1) ... [2021-11-07 00:57:19,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (1/1) ... [2021-11-07 00:57:19,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (1/1) ... [2021-11-07 00:57:20,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:57:20,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:57:20,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:57:20,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:57:20,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (1/1) ... [2021-11-07 00:57:20,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:57:20,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:57:20,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:57:20,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:57:20,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:57:20,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:57:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:57:20,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:57:31,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:57:31,434 INFO L299 CfgBuilder]: Removed 761 assume(true) statements. [2021-11-07 00:57:31,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:57:31 BoogieIcfgContainer [2021-11-07 00:57:31,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:57:31,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:57:31,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:57:31,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:57:31,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:57:18" (1/3) ... [2021-11-07 00:57:31,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da9aaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:57:31, skipping insertion in model container [2021-11-07 00:57:31,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:19" (2/3) ... [2021-11-07 00:57:31,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da9aaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:57:31, skipping insertion in model container [2021-11-07 00:57:31,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:57:31" (3/3) ... [2021-11-07 00:57:31,454 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2021-11-07 00:57:31,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:57:31,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 00:57:31,548 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:57:31,555 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 00:57:31,555 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 00:57:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 3457 states, 3451 states have (on average 1.894523326572008) internal successors, (6538), 3456 states have internal predecessors, (6538), 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 00:57:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 00:57:31,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:31,694 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 00:57:31,695 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 00:57:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:31,700 INFO L85 PathProgramCache]: Analyzing trace with hash -909233364, now seen corresponding path program 1 times [2021-11-07 00:57:31,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:31,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625941514] [2021-11-07 00:57:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:31,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:31,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:31,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:31,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:57:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:32,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:57:32,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:32,381 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 00:57:32,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:32,494 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 00:57:32,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:32,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625941514] [2021-11-07 00:57:32,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625941514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:32,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:32,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:57:32,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671903555] [2021-11-07 00:57:32,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:57:32,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:32,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:57:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:57:32,536 INFO L87 Difference]: Start difference. First operand has 3457 states, 3451 states have (on average 1.894523326572008) internal successors, (6538), 3456 states have internal predecessors, (6538), 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 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:32,650 INFO L93 Difference]: Finished difference Result 3476 states and 6561 transitions. [2021-11-07 00:57:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:57:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 00:57:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:32,693 INFO L225 Difference]: With dead ends: 3476 [2021-11-07 00:57:32,693 INFO L226 Difference]: Without dead ends: 3453 [2021-11-07 00:57:32,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 102 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 00:57:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2021-11-07 00:57:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 3453. [2021-11-07 00:57:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3448 states have (on average 1.892691415313225) internal successors, (6526), 3452 states have internal predecessors, (6526), 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 00:57:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 6526 transitions. [2021-11-07 00:57:33,007 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 6526 transitions. Word has length 52 [2021-11-07 00:57:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:33,008 INFO L470 AbstractCegarLoop]: Abstraction has 3453 states and 6526 transitions. [2021-11-07 00:57:33,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 6526 transitions. [2021-11-07 00:57:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 00:57:33,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:33,015 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 00:57:33,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:33,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:33,233 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 00:57:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:33,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2142066021, now seen corresponding path program 1 times [2021-11-07 00:57:33,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:33,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100211141] [2021-11-07 00:57:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:33,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:33,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:33,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:33,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:57:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:57:33,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:33,908 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 00:57:33,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:34,113 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 00:57:34,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:34,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100211141] [2021-11-07 00:57:34,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100211141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:34,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:34,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:57:34,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686907770] [2021-11-07 00:57:34,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:57:34,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:34,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:57:34,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:57:34,122 INFO L87 Difference]: Start difference. First operand 3453 states and 6526 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 00:57:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:34,553 INFO L93 Difference]: Finished difference Result 10279 states and 19435 transitions. [2021-11-07 00:57:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:57:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 00:57:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:34,689 INFO L225 Difference]: With dead ends: 10279 [2021-11-07 00:57:34,689 INFO L226 Difference]: Without dead ends: 6839 [2021-11-07 00:57:34,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 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 00:57:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2021-11-07 00:57:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 3453. [2021-11-07 00:57:34,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3448 states have (on average 1.890661252900232) internal successors, (6519), 3452 states have internal predecessors, (6519), 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 00:57:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 6519 transitions. [2021-11-07 00:57:34,881 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 6519 transitions. Word has length 54 [2021-11-07 00:57:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:34,882 INFO L470 AbstractCegarLoop]: Abstraction has 3453 states and 6519 transitions. [2021-11-07 00:57:34,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 00:57:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 6519 transitions. [2021-11-07 00:57:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 00:57:34,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:34,888 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 00:57:34,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:35,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:35,101 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 00:57:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash 574319710, now seen corresponding path program 1 times [2021-11-07 00:57:35,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:35,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296990584] [2021-11-07 00:57:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:35,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:35,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:35,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:57:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:57:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:35,729 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 00:57:35,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:35,937 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 00:57:35,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:35,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296990584] [2021-11-07 00:57:35,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296990584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:35,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:35,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:57:35,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208958951] [2021-11-07 00:57:35,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:57:35,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:35,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:57:35,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:57:35,940 INFO L87 Difference]: Start difference. First operand 3453 states and 6519 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 00:57:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:37,336 INFO L93 Difference]: Finished difference Result 23646 states and 44685 transitions. [2021-11-07 00:57:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 00:57:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 00:57:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:37,457 INFO L225 Difference]: With dead ends: 23646 [2021-11-07 00:57:37,457 INFO L226 Difference]: Without dead ends: 20215 [2021-11-07 00:57:37,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 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 00:57:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20215 states. [2021-11-07 00:57:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20215 to 3431. [2021-11-07 00:57:37,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3426 states have (on average 1.8879159369527145) internal successors, (6468), 3430 states have internal predecessors, (6468), 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 00:57:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 6468 transitions. [2021-11-07 00:57:37,928 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 6468 transitions. Word has length 60 [2021-11-07 00:57:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:37,929 INFO L470 AbstractCegarLoop]: Abstraction has 3431 states and 6468 transitions. [2021-11-07 00:57:37,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 00:57:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 6468 transitions. [2021-11-07 00:57:37,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 00:57:37,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:37,936 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] [2021-11-07 00:57:37,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:38,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:38,150 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 00:57:38,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:38,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1981235939, now seen corresponding path program 1 times [2021-11-07 00:57:38,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:38,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744939447] [2021-11-07 00:57:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:38,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:38,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:38,156 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:38,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:57:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:38,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:57:38,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:38,897 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 00:57:38,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:39,131 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 00:57:39,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:39,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744939447] [2021-11-07 00:57:39,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744939447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:39,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:39,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:57:39,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937475629] [2021-11-07 00:57:39,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:57:39,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:57:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:57:39,136 INFO L87 Difference]: Start difference. First operand 3431 states and 6468 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 00:57:39,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:39,808 INFO L93 Difference]: Finished difference Result 10190 states and 19239 transitions. [2021-11-07 00:57:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:57:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 62 [2021-11-07 00:57:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:39,832 INFO L225 Difference]: With dead ends: 10190 [2021-11-07 00:57:39,832 INFO L226 Difference]: Without dead ends: 6781 [2021-11-07 00:57:39,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 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 00:57:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6781 states. [2021-11-07 00:57:40,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6781 to 3431. [2021-11-07 00:57:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3426 states have (on average 1.8847051955633392) internal successors, (6457), 3430 states have internal predecessors, (6457), 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 00:57:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 6457 transitions. [2021-11-07 00:57:40,092 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 6457 transitions. Word has length 62 [2021-11-07 00:57:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:40,092 INFO L470 AbstractCegarLoop]: Abstraction has 3431 states and 6457 transitions. [2021-11-07 00:57:40,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 00:57:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 6457 transitions. [2021-11-07 00:57:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 00:57:40,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:40,119 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] [2021-11-07 00:57:40,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:40,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:40,320 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 00:57:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1134097960, now seen corresponding path program 1 times [2021-11-07 00:57:40,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:40,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985745028] [2021-11-07 00:57:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:40,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:40,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:40,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:40,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:57:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:57:40,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:41,126 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 00:57:41,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:41,377 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 00:57:41,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:41,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985745028] [2021-11-07 00:57:41,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985745028] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:41,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:41,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:57:41,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914563472] [2021-11-07 00:57:41,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:57:41,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:57:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:57:41,381 INFO L87 Difference]: Start difference. First operand 3431 states and 6457 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 00:57:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:44,885 INFO L93 Difference]: Finished difference Result 36985 states and 69861 transitions. [2021-11-07 00:57:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:57:44,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 68 [2021-11-07 00:57:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:45,009 INFO L225 Difference]: With dead ends: 36985 [2021-11-07 00:57:45,009 INFO L226 Difference]: Without dead ends: 33579 [2021-11-07 00:57:45,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 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 00:57:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33579 states. [2021-11-07 00:57:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33579 to 3433. [2021-11-07 00:57:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3428 states have (on average 1.882730455075846) internal successors, (6454), 3432 states have internal predecessors, (6454), 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 00:57:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 6454 transitions. [2021-11-07 00:57:45,615 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 6454 transitions. Word has length 68 [2021-11-07 00:57:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:45,615 INFO L470 AbstractCegarLoop]: Abstraction has 3433 states and 6454 transitions. [2021-11-07 00:57:45,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 00:57:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 6454 transitions. [2021-11-07 00:57:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 00:57:45,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:45,621 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] [2021-11-07 00:57:45,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:45,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:45,839 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 00:57:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 401482357, now seen corresponding path program 1 times [2021-11-07 00:57:45,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:45,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322044438] [2021-11-07 00:57:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:45,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:45,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:45,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:45,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:57:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:46,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:57:46,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:46,680 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 00:57:46,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:46,946 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 00:57:46,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:46,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322044438] [2021-11-07 00:57:46,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322044438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:46,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:46,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:57:46,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769399893] [2021-11-07 00:57:46,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:57:46,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:46,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:57:46,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:57:46,952 INFO L87 Difference]: Start difference. First operand 3433 states and 6454 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 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 00:57:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:49,415 INFO L93 Difference]: Finished difference Result 36953 states and 69782 transitions. [2021-11-07 00:57:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 00:57:49,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 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 70 [2021-11-07 00:57:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:49,541 INFO L225 Difference]: With dead ends: 36953 [2021-11-07 00:57:49,542 INFO L226 Difference]: Without dead ends: 33547 [2021-11-07 00:57:49,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 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 00:57:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33547 states. [2021-11-07 00:57:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33547 to 3437. [2021-11-07 00:57:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 3432 states have (on average 1.8814102564102564) internal successors, (6457), 3436 states have internal predecessors, (6457), 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 00:57:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 6457 transitions. [2021-11-07 00:57:50,198 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 6457 transitions. Word has length 70 [2021-11-07 00:57:50,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:50,199 INFO L470 AbstractCegarLoop]: Abstraction has 3437 states and 6457 transitions. [2021-11-07 00:57:50,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 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 00:57:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 6457 transitions. [2021-11-07 00:57:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 00:57:50,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:50,205 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] [2021-11-07 00:57:50,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:50,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:50,423 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 00:57:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash 167637416, now seen corresponding path program 1 times [2021-11-07 00:57:50,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:50,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350984655] [2021-11-07 00:57:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:50,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:50,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:50,427 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:50,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:57:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:50,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:57:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:51,150 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 00:57:51,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:51,372 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 00:57:51,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:51,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350984655] [2021-11-07 00:57:51,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350984655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:51,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:51,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:57:51,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572386258] [2021-11-07 00:57:51,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:57:51,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:57:51,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:57:51,377 INFO L87 Difference]: Start difference. First operand 3437 states and 6457 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 00:57:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:51,669 INFO L93 Difference]: Finished difference Result 6822 states and 12845 transitions. [2021-11-07 00:57:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:57:51,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 72 [2021-11-07 00:57:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:51,683 INFO L225 Difference]: With dead ends: 6822 [2021-11-07 00:57:51,683 INFO L226 Difference]: Without dead ends: 3416 [2021-11-07 00:57:51,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 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 00:57:51,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2021-11-07 00:57:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 3416. [2021-11-07 00:57:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3411 states have (on average 1.8818528290823806) internal successors, (6419), 3415 states have internal predecessors, (6419), 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 00:57:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 6419 transitions. [2021-11-07 00:57:51,997 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 6419 transitions. Word has length 72 [2021-11-07 00:57:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:51,998 INFO L470 AbstractCegarLoop]: Abstraction has 3416 states and 6419 transitions. [2021-11-07 00:57:51,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 00:57:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 6419 transitions. [2021-11-07 00:57:52,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 00:57:52,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:52,005 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] [2021-11-07 00:57:52,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:52,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:52,221 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 00:57:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1226289584, now seen corresponding path program 1 times [2021-11-07 00:57:52,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:52,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000172707] [2021-11-07 00:57:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:52,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:52,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:52,225 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:52,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:57:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:52,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:57:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:53,030 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 00:57:53,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:53,251 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 00:57:53,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:53,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000172707] [2021-11-07 00:57:53,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000172707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:53,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:53,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:57:53,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755703262] [2021-11-07 00:57:53,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:57:53,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:57:53,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:57:53,255 INFO L87 Difference]: Start difference. First operand 3416 states and 6419 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 00:57:53,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:53,678 INFO L93 Difference]: Finished difference Result 6766 states and 12748 transitions. [2021-11-07 00:57:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:57:53,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 73 [2021-11-07 00:57:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:53,684 INFO L225 Difference]: With dead ends: 6766 [2021-11-07 00:57:53,684 INFO L226 Difference]: Without dead ends: 3391 [2021-11-07 00:57:53,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 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 00:57:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2021-11-07 00:57:53,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 3391. [2021-11-07 00:57:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 3386 states have (on average 1.8827525103366805) internal successors, (6375), 3390 states have internal predecessors, (6375), 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 00:57:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 6375 transitions. [2021-11-07 00:57:53,976 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 6375 transitions. Word has length 73 [2021-11-07 00:57:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:53,977 INFO L470 AbstractCegarLoop]: Abstraction has 3391 states and 6375 transitions. [2021-11-07 00:57:53,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 00:57:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 6375 transitions. [2021-11-07 00:57:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 00:57:53,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:53,997 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] [2021-11-07 00:57:54,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:54,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:54,198 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 00:57:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash 704912281, now seen corresponding path program 1 times [2021-11-07 00:57:54,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:54,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418528208] [2021-11-07 00:57:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:54,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:54,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:54,202 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:54,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:57:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:57:54,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:55,135 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 00:57:55,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:55,349 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 00:57:55,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:55,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418528208] [2021-11-07 00:57:55,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418528208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:55,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:55,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:57:55,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010306268] [2021-11-07 00:57:55,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:57:55,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:57:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:57:55,352 INFO L87 Difference]: Start difference. First operand 3391 states and 6375 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 00:57:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:55,548 INFO L93 Difference]: Finished difference Result 6741 states and 12704 transitions. [2021-11-07 00:57:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:57:55,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 74 [2021-11-07 00:57:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:55,554 INFO L225 Difference]: With dead ends: 6741 [2021-11-07 00:57:55,555 INFO L226 Difference]: Without dead ends: 3388 [2021-11-07 00:57:55,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 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 00:57:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3388 states. [2021-11-07 00:57:55,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3388 to 3388. [2021-11-07 00:57:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3383 states have (on average 1.882057345551286) internal successors, (6367), 3387 states have internal predecessors, (6367), 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 00:57:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 6367 transitions. [2021-11-07 00:57:55,902 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 6367 transitions. Word has length 74 [2021-11-07 00:57:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:55,903 INFO L470 AbstractCegarLoop]: Abstraction has 3388 states and 6367 transitions. [2021-11-07 00:57:55,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 00:57:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 6367 transitions. [2021-11-07 00:57:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:57:55,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:55,907 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] [2021-11-07 00:57:55,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:56,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:56,122 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 00:57:56,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash -56926326, now seen corresponding path program 1 times [2021-11-07 00:57:56,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:56,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124227684] [2021-11-07 00:57:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:56,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:56,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:56,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:56,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:57:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:57:56,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:56,975 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 00:57:56,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:57,142 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 00:57:57,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:57,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124227684] [2021-11-07 00:57:57,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124227684] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:57,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:57,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:57:57,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485357133] [2021-11-07 00:57:57,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:57:57,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:57,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:57:57,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:57:57,144 INFO L87 Difference]: Start difference. First operand 3388 states and 6367 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:57,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:57,390 INFO L93 Difference]: Finished difference Result 6732 states and 12686 transitions. [2021-11-07 00:57:57,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:57:57,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 00:57:57,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:57,396 INFO L225 Difference]: With dead ends: 6732 [2021-11-07 00:57:57,396 INFO L226 Difference]: Without dead ends: 3386 [2021-11-07 00:57:57,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 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 00:57:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-11-07 00:57:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3386. [2021-11-07 00:57:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3381 states have (on average 1.8813960366755398) internal successors, (6361), 3385 states have internal predecessors, (6361), 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 00:57:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 6361 transitions. [2021-11-07 00:57:57,616 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 6361 transitions. Word has length 75 [2021-11-07 00:57:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:57,617 INFO L470 AbstractCegarLoop]: Abstraction has 3386 states and 6361 transitions. [2021-11-07 00:57:57,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 6361 transitions. [2021-11-07 00:57:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 00:57:57,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:57,622 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] [2021-11-07 00:57:57,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:57,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:57,837 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 00:57:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1358899134, now seen corresponding path program 1 times [2021-11-07 00:57:57,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:57,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459978552] [2021-11-07 00:57:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:57,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:57,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:57,840 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:57,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:57:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:58,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:57:58,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:58,714 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 00:57:58,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:58,952 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 00:57:58,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:58,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459978552] [2021-11-07 00:57:58,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459978552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:58,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:58,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:57:58,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156879801] [2021-11-07 00:57:58,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:57:58,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:58,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:57:58,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:57:58,956 INFO L87 Difference]: Start difference. First operand 3386 states and 6361 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 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 00:57:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:59,253 INFO L93 Difference]: Finished difference Result 6725 states and 12671 transitions. [2021-11-07 00:57:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:57:59,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 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 76 [2021-11-07 00:57:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:59,258 INFO L225 Difference]: With dead ends: 6725 [2021-11-07 00:57:59,259 INFO L226 Difference]: Without dead ends: 3384 [2021-11-07 00:57:59,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 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 00:57:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-11-07 00:57:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 3384. [2021-11-07 00:57:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 3379 states have (on average 1.8807339449541285) internal successors, (6355), 3383 states have internal predecessors, (6355), 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 00:57:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 6355 transitions. [2021-11-07 00:57:59,486 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 6355 transitions. Word has length 76 [2021-11-07 00:57:59,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:59,486 INFO L470 AbstractCegarLoop]: Abstraction has 3384 states and 6355 transitions. [2021-11-07 00:57:59,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 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 00:57:59,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 6355 transitions. [2021-11-07 00:57:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 00:57:59,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:59,491 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] [2021-11-07 00:57:59,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:59,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:59,709 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 00:57:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash -377376449, now seen corresponding path program 1 times [2021-11-07 00:57:59,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:59,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329060323] [2021-11-07 00:57:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:59,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:59,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:59,712 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:59,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:58:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:00,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:00,981 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 00:58:00,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:02,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:02,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329060323] [2021-11-07 00:58:02,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329060323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:02,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:02,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 00:58:02,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204259876] [2021-11-07 00:58:02,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:58:02,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:58:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:58:02,853 INFO L87 Difference]: Start difference. First operand 3384 states and 6355 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 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 00:58:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:08,368 INFO L93 Difference]: Finished difference Result 10869 states and 20497 transitions. [2021-11-07 00:58:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:08,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 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 77 [2021-11-07 00:58:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:08,385 INFO L225 Difference]: With dead ends: 10869 [2021-11-07 00:58:08,385 INFO L226 Difference]: Without dead ends: 7547 [2021-11-07 00:58:08,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 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 00:58:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7547 states. [2021-11-07 00:58:08,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7547 to 4872. [2021-11-07 00:58:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4867 states have (on average 1.883501130059585) internal successors, (9167), 4871 states have internal predecessors, (9167), 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 00:58:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 9167 transitions. [2021-11-07 00:58:08,865 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 9167 transitions. Word has length 77 [2021-11-07 00:58:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:08,865 INFO L470 AbstractCegarLoop]: Abstraction has 4872 states and 9167 transitions. [2021-11-07 00:58:08,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 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 00:58:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 9167 transitions. [2021-11-07 00:58:08,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 00:58:08,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:08,870 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] [2021-11-07 00:58:08,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:09,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:09,085 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 00:58:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1182587949, now seen corresponding path program 1 times [2021-11-07 00:58:09,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:09,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450257953] [2021-11-07 00:58:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:09,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:09,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:09,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:09,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:58:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:09,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:10,183 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 00:58:10,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:10,440 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 00:58:10,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:10,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450257953] [2021-11-07 00:58:10,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450257953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:10,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:10,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:58:10,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800178755] [2021-11-07 00:58:10,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:10,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:10,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:10,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:10,443 INFO L87 Difference]: Start difference. First operand 4872 states and 9167 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 00:58:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:15,875 INFO L93 Difference]: Finished difference Result 20672 states and 38809 transitions. [2021-11-07 00:58:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:58:15,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 78 [2021-11-07 00:58:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:15,904 INFO L225 Difference]: With dead ends: 20672 [2021-11-07 00:58:15,904 INFO L226 Difference]: Without dead ends: 15861 [2021-11-07 00:58:15,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 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 00:58:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15861 states. [2021-11-07 00:58:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15861 to 4878. [2021-11-07 00:58:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4878 states, 4873 states have (on average 1.882413297763185) internal successors, (9173), 4877 states have internal predecessors, (9173), 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 00:58:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4878 states to 4878 states and 9173 transitions. [2021-11-07 00:58:16,493 INFO L78 Accepts]: Start accepts. Automaton has 4878 states and 9173 transitions. Word has length 78 [2021-11-07 00:58:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:16,493 INFO L470 AbstractCegarLoop]: Abstraction has 4878 states and 9173 transitions. [2021-11-07 00:58:16,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 00:58:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4878 states and 9173 transitions. [2021-11-07 00:58:16,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 00:58:16,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:16,498 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] [2021-11-07 00:58:16,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:16,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:16,713 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 00:58:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash -770592579, now seen corresponding path program 1 times [2021-11-07 00:58:16,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:16,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21122075] [2021-11-07 00:58:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:16,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:16,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:16,715 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:16,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:58:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:17,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:58:17,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:17,789 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 00:58:17,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:18,046 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 00:58:18,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:18,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21122075] [2021-11-07 00:58:18,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21122075] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:18,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:18,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 00:58:18,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145378663] [2021-11-07 00:58:18,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:18,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:18,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:18,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:18,048 INFO L87 Difference]: Start difference. First operand 4878 states and 9173 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 00:58:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:27,626 INFO L93 Difference]: Finished difference Result 16634 states and 31288 transitions. [2021-11-07 00:58:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:58:27,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 79 [2021-11-07 00:58:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:27,647 INFO L225 Difference]: With dead ends: 16634 [2021-11-07 00:58:27,647 INFO L226 Difference]: Without dead ends: 13316 [2021-11-07 00:58:27,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 00:58:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13316 states. [2021-11-07 00:58:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13316 to 8380. [2021-11-07 00:58:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8380 states, 8375 states have (on average 1.880358208955224) internal successors, (15748), 8379 states have internal predecessors, (15748), 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 00:58:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8380 states to 8380 states and 15748 transitions. [2021-11-07 00:58:28,371 INFO L78 Accepts]: Start accepts. Automaton has 8380 states and 15748 transitions. Word has length 79 [2021-11-07 00:58:28,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:28,371 INFO L470 AbstractCegarLoop]: Abstraction has 8380 states and 15748 transitions. [2021-11-07 00:58:28,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 00:58:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 8380 states and 15748 transitions. [2021-11-07 00:58:28,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 00:58:28,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:28,378 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 00:58:28,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 00:58:28,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:28,593 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 00:58:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash 276272004, now seen corresponding path program 1 times [2021-11-07 00:58:28,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:28,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39271928] [2021-11-07 00:58:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:28,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:28,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:28,595 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:28,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:58:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:29,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:58:29,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:29,686 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 00:58:29,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:29,947 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 00:58:29,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:29,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39271928] [2021-11-07 00:58:29,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39271928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:29,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:29,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:58:29,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442965886] [2021-11-07 00:58:29,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:29,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:29,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:58:29,950 INFO L87 Difference]: Start difference. First operand 8380 states and 15748 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 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 00:58:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:34,380 INFO L93 Difference]: Finished difference Result 19966 states and 37335 transitions. [2021-11-07 00:58:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:58:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 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 00:58:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:34,399 INFO L225 Difference]: With dead ends: 19966 [2021-11-07 00:58:34,399 INFO L226 Difference]: Without dead ends: 13120 [2021-11-07 00:58:34,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 156 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 00:58:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13120 states. [2021-11-07 00:58:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13120 to 8357. [2021-11-07 00:58:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8352 states have (on average 1.8469827586206897) internal successors, (15426), 8356 states have internal predecessors, (15426), 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 00:58:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 15426 transitions. [2021-11-07 00:58:35,085 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 15426 transitions. Word has length 80 [2021-11-07 00:58:35,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:35,085 INFO L470 AbstractCegarLoop]: Abstraction has 8357 states and 15426 transitions. [2021-11-07 00:58:35,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 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 00:58:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 15426 transitions. [2021-11-07 00:58:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 00:58:35,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:35,089 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 00:58:35,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:35,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:35,305 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 00:58:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:35,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1138625899, now seen corresponding path program 1 times [2021-11-07 00:58:35,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:35,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173673278] [2021-11-07 00:58:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:35,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:35,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:35,308 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:35,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 00:58:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:36,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:36,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:36,887 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 00:58:36,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:36,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173673278] [2021-11-07 00:58:36,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173673278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:36,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:36,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:58:36,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576619509] [2021-11-07 00:58:36,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:36,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:36,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:36,889 INFO L87 Difference]: Start difference. First operand 8357 states and 15426 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 00:58:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:40,538 INFO L93 Difference]: Finished difference Result 56189 states and 104243 transitions. [2021-11-07 00:58:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 00:58:40,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 00:58:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:40,611 INFO L225 Difference]: With dead ends: 56189 [2021-11-07 00:58:40,611 INFO L226 Difference]: Without dead ends: 47889 [2021-11-07 00:58:40,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 157 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 00:58:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47889 states. [2021-11-07 00:58:41,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47889 to 12981. [2021-11-07 00:58:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12981 states, 12976 states have (on average 1.8495684340320593) internal successors, (24000), 12980 states have internal predecessors, (24000), 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 00:58:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12981 states to 12981 states and 24000 transitions. [2021-11-07 00:58:41,805 INFO L78 Accepts]: Start accepts. Automaton has 12981 states and 24000 transitions. Word has length 81 [2021-11-07 00:58:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:41,806 INFO L470 AbstractCegarLoop]: Abstraction has 12981 states and 24000 transitions. [2021-11-07 00:58:41,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 00:58:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 12981 states and 24000 transitions. [2021-11-07 00:58:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 00:58:41,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:41,808 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] [2021-11-07 00:58:41,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:42,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:42,025 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 00:58:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash -237968516, now seen corresponding path program 1 times [2021-11-07 00:58:42,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:42,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699474313] [2021-11-07 00:58:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:42,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:42,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:42,027 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:42,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 00:58:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:43,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:58:43,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:43,268 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 00:58:43,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:43,532 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 00:58:43,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:43,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699474313] [2021-11-07 00:58:43,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699474313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:43,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:43,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:58:43,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785945043] [2021-11-07 00:58:43,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:58:43,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:58:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:43,536 INFO L87 Difference]: Start difference. First operand 12981 states and 24000 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 00:58:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:45,178 INFO L93 Difference]: Finished difference Result 33325 states and 61693 transitions. [2021-11-07 00:58:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:58:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 82 [2021-11-07 00:58:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:45,214 INFO L225 Difference]: With dead ends: 33325 [2021-11-07 00:58:45,214 INFO L226 Difference]: Without dead ends: 22138 [2021-11-07 00:58:45,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22138 states. [2021-11-07 00:58:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22138 to 22123. [2021-11-07 00:58:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22123 states, 22118 states have (on average 1.8509358893209151) internal successors, (40939), 22122 states have internal predecessors, (40939), 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 00:58:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22123 states to 22123 states and 40939 transitions. [2021-11-07 00:58:46,945 INFO L78 Accepts]: Start accepts. Automaton has 22123 states and 40939 transitions. Word has length 82 [2021-11-07 00:58:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:46,945 INFO L470 AbstractCegarLoop]: Abstraction has 22123 states and 40939 transitions. [2021-11-07 00:58:46,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 00:58:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 22123 states and 40939 transitions. [2021-11-07 00:58:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 00:58:46,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:46,948 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] [2021-11-07 00:58:46,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:47,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:47,148 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 00:58:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:47,149 INFO L85 PathProgramCache]: Analyzing trace with hash -476137860, now seen corresponding path program 1 times [2021-11-07 00:58:47,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:47,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392049203] [2021-11-07 00:58:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:47,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:47,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:47,151 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:47,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 00:58:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:48,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:58:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:48,431 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 00:58:48,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:48,678 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 00:58:48,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:48,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392049203] [2021-11-07 00:58:48,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392049203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:48,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:48,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:58:48,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167009983] [2021-11-07 00:58:48,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:58:48,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:58:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:48,681 INFO L87 Difference]: Start difference. First operand 22123 states and 40939 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 00:58:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:51,387 INFO L93 Difference]: Finished difference Result 59493 states and 110158 transitions. [2021-11-07 00:58:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:58:51,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 83 [2021-11-07 00:58:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:51,446 INFO L225 Difference]: With dead ends: 59493 [2021-11-07 00:58:51,446 INFO L226 Difference]: Without dead ends: 40236 [2021-11-07 00:58:51,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40236 states. [2021-11-07 00:58:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40236 to 40221. [2021-11-07 00:58:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40221 states, 40216 states have (on average 1.8513278297195146) internal successors, (74453), 40220 states have internal predecessors, (74453), 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 00:58:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40221 states to 40221 states and 74453 transitions. [2021-11-07 00:58:55,157 INFO L78 Accepts]: Start accepts. Automaton has 40221 states and 74453 transitions. Word has length 83 [2021-11-07 00:58:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:55,158 INFO L470 AbstractCegarLoop]: Abstraction has 40221 states and 74453 transitions. [2021-11-07 00:58:55,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 00:58:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 40221 states and 74453 transitions. [2021-11-07 00:58:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 00:58:55,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:55,160 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] [2021-11-07 00:58:55,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 00:58:55,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:55,361 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 00:58:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1635565119, now seen corresponding path program 1 times [2021-11-07 00:58:55,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:55,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961591339] [2021-11-07 00:58:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:55,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:55,377 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:55,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 00:58:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:56,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:58:56,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:56,758 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 00:58:56,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:57,042 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 00:58:57,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:57,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961591339] [2021-11-07 00:58:57,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961591339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:57,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:57,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:58:57,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424998116] [2021-11-07 00:58:57,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:58:57,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:58:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:57,045 INFO L87 Difference]: Start difference. First operand 40221 states and 74453 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 00:59:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:03,225 INFO L93 Difference]: Finished difference Result 111457 states and 206311 transitions. [2021-11-07 00:59:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:03,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 84 [2021-11-07 00:59:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:03,391 INFO L225 Difference]: With dead ends: 111457 [2021-11-07 00:59:03,391 INFO L226 Difference]: Without dead ends: 76030 [2021-11-07 00:59:03,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76030 states. [2021-11-07 00:59:09,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76030 to 76015. [2021-11-07 00:59:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76015 states, 76010 states have (on average 1.8504801999736877) internal successors, (140655), 76014 states have internal predecessors, (140655), 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 00:59:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76015 states to 76015 states and 140655 transitions. [2021-11-07 00:59:10,160 INFO L78 Accepts]: Start accepts. Automaton has 76015 states and 140655 transitions. Word has length 84 [2021-11-07 00:59:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:10,160 INFO L470 AbstractCegarLoop]: Abstraction has 76015 states and 140655 transitions. [2021-11-07 00:59:10,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 00:59:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 76015 states and 140655 transitions. [2021-11-07 00:59:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 00:59:10,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:10,162 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] [2021-11-07 00:59:10,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:10,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:10,363 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 00:59:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1289216671, now seen corresponding path program 1 times [2021-11-07 00:59:10,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:10,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868755592] [2021-11-07 00:59:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:10,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:10,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:10,366 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:10,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5d54fbb-c1e9-4a20-9ec3-ff009df22695/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 00:59:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:11,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:59:11,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:11,725 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 00:59:11,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:12,030 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 00:59:12,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:12,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868755592] [2021-11-07 00:59:12,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868755592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:12,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:12,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:59:12,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848782159] [2021-11-07 00:59:12,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:12,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:12,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:12,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:12,032 INFO L87 Difference]: Start difference. First operand 76015 states and 140655 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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)