./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.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_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/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_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/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_42ac3fd5-ca1a-421e-b13c-93263e593c38/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 be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:36:12,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:36:12,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:36:12,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:36:12,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:36:12,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:36:12,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:36:12,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:36:12,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:36:12,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:36:12,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:36:12,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:36:12,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:36:12,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:36:12,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:36:12,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:36:12,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:36:12,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:36:12,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:36:12,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:36:12,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:36:12,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:36:12,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:36:12,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:36:12,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:36:12,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:36:12,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:36:12,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:36:12,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:36:12,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:36:12,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:36:12,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:36:12,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:36:12,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:36:12,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:36:12,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:36:12,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:36:12,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:36:12,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:36:12,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:36:12,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:36:12,284 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:36:12,337 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:36:12,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:36:12,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:36:12,339 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:36:12,340 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:36:12,340 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:36:12,340 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:36:12,341 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:36:12,349 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:36:12,349 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:36:12,351 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:36:12,351 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:36:12,351 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:36:12,352 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:36:12,352 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:36:12,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:36:12,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:36:12,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:36:12,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:36:12,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:36:12,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:36:12,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:36:12,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:36:12,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:36:12,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:36:12,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:36:12,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:36:12,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:36:12,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:36:12,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:36:12,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:36:12,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:36:12,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:36:12,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:36:12,360 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:36:12,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:36:12,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:36:12,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:36:12,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:36:12,362 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_42ac3fd5-ca1a-421e-b13c-93263e593c38/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 [2021-11-07 01:36:12,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:36:12,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:36:12,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:36:12,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:36:12,770 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:36:12,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-07 01:36:12,855 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/data/e691ce51f/9605a0b2f48f4300b4e4cd14ace981c3/FLAG30989ce06 [2021-11-07 01:36:13,800 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:36:13,801 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-07 01:36:13,848 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/data/e691ce51f/9605a0b2f48f4300b4e4cd14ace981c3/FLAG30989ce06 [2021-11-07 01:36:13,892 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/data/e691ce51f/9605a0b2f48f4300b4e4cd14ace981c3 [2021-11-07 01:36:13,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:36:13,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:36:13,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:13,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:36:13,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:36:13,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:13" (1/1) ... [2021-11-07 01:36:13,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@350448dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:13, skipping insertion in model container [2021-11-07 01:36:13,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:13" (1/1) ... [2021-11-07 01:36:13,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:36:14,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:36:14,780 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_42ac3fd5-ca1a-421e-b13c-93263e593c38/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-07 01:36:14,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:36:14,858 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:36:14,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7aa0a00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:14, skipping insertion in model container [2021-11-07 01:36:14,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:14,865 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:36:14,868 INFO L168 Benchmark]: Toolchain (without parser) took 966.07 ms. Allocated memory is still 98.6 MB. Free memory was 53.9 MB in the beginning and 57.2 MB in the end (delta: -3.3 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:36:14,870 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory was 72.7 MB in the beginning and 72.7 MB in the end (delta: 53.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:36:14,872 INFO L168 Benchmark]: CACSL2BoogieTranslator took 959.81 ms. Allocated memory is still 98.6 MB. Free memory was 53.7 MB in the beginning and 57.2 MB in the end (delta: -3.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:36:14,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory was 72.7 MB in the beginning and 72.7 MB in the end (delta: 53.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 959.81 ms. Allocated memory is still 98.6 MB. Free memory was 53.7 MB in the beginning and 57.2 MB in the end (delta: -3.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 179]: 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_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/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_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/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_42ac3fd5-ca1a-421e-b13c-93263e593c38/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 be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:36:17,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:36:17,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:36:17,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:36:17,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:36:17,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:36:17,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:36:17,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:36:17,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:36:17,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:36:17,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:36:17,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:36:17,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:36:17,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:36:17,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:36:17,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:36:17,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:36:17,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:36:17,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:36:17,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:36:17,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:36:17,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:36:17,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:36:17,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:36:17,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:36:17,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:36:17,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:36:17,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:36:17,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:36:17,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:36:17,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:36:17,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:36:17,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:36:17,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:36:17,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:36:17,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:36:17,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:36:17,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:36:17,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:36:17,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:36:17,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:36:17,922 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:36:17,982 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:36:17,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:36:17,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:36:17,987 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:36:17,987 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:36:17,988 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:36:17,988 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:36:17,988 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:36:17,988 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:36:17,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:36:17,992 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:36:17,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:36:17,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:36:17,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:36:17,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:36:17,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:36:17,994 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:36:17,994 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:36:17,994 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:36:17,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:36:17,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:36:17,995 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:36:17,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:36:17,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:36:17,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:36:17,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:36:17,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:36:17,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:36:17,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:36:17,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:36:17,998 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:36:17,998 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:17,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:36:17,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:36:17,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:36:17,999 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_42ac3fd5-ca1a-421e-b13c-93263e593c38/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 [2021-11-07 01:36:18,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:36:18,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:36:18,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:36:18,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:36:18,556 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:36:18,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-07 01:36:18,647 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/data/d69945498/327db886446e4c4cb8415bc94d21ab55/FLAG35cb2e5d4 [2021-11-07 01:36:19,578 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:36:19,579 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-07 01:36:19,631 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/data/d69945498/327db886446e4c4cb8415bc94d21ab55/FLAG35cb2e5d4 [2021-11-07 01:36:19,643 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/data/d69945498/327db886446e4c4cb8415bc94d21ab55 [2021-11-07 01:36:19,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:36:19,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:36:19,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:19,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:36:19,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:36:19,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:19" (1/1) ... [2021-11-07 01:36:19,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64339c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:19, skipping insertion in model container [2021-11-07 01:36:19,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:19" (1/1) ... [2021-11-07 01:36:19,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:36:19,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:36:20,602 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_42ac3fd5-ca1a-421e-b13c-93263e593c38/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-07 01:36:20,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:36:20,655 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:36:20,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:36:20,814 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_42ac3fd5-ca1a-421e-b13c-93263e593c38/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-07 01:36:20,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:36:20,854 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:36:20,982 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_42ac3fd5-ca1a-421e-b13c-93263e593c38/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-07 01:36:20,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:36:21,047 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:36:21,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21 WrapperNode [2021-11-07 01:36:21,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:36:21,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:36:21,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:36:21,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:36:21,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (1/1) ... [2021-11-07 01:36:21,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (1/1) ... [2021-11-07 01:36:21,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:36:21,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:36:21,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:36:21,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:36:21,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (1/1) ... [2021-11-07 01:36:21,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (1/1) ... [2021-11-07 01:36:21,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (1/1) ... [2021-11-07 01:36:21,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (1/1) ... [2021-11-07 01:36:21,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (1/1) ... [2021-11-07 01:36:22,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (1/1) ... [2021-11-07 01:36:22,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (1/1) ... [2021-11-07 01:36:22,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:36:22,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:36:22,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:36:22,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:36:22,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (1/1) ... [2021-11-07 01:36:22,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:36:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:36:22,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:36:22,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:36:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:36:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:36:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:36:22,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:36:35,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:36:35,443 INFO L299 CfgBuilder]: Removed 833 assume(true) statements. [2021-11-07 01:36:35,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:35 BoogieIcfgContainer [2021-11-07 01:36:35,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:36:35,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:36:35,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:36:35,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:36:35,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:36:19" (1/3) ... [2021-11-07 01:36:35,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb7b136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:35, skipping insertion in model container [2021-11-07 01:36:35,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:21" (2/3) ... [2021-11-07 01:36:35,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb7b136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:35, skipping insertion in model container [2021-11-07 01:36:35,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:35" (3/3) ... [2021-11-07 01:36:35,461 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product23.cil.c [2021-11-07 01:36:35,467 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:36:35,468 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:36:35,570 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:36:35,582 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:36:35,582 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:36:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 3567 states, 3561 states have (on average 1.88767200224656) internal successors, (6722), 3566 states have internal predecessors, (6722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:36:35,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:35,755 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] [2021-11-07 01:36:35,756 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:36:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:35,769 INFO L85 PathProgramCache]: Analyzing trace with hash 352127062, now seen corresponding path program 1 times [2021-11-07 01:36:35,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:35,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893749649] [2021-11-07 01:36:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:35,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:35,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:35,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:35,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:36:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:36,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:36:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:36,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:36,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:36,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893749649] [2021-11-07 01:36:36,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893749649] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:36,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:36,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:36:36,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937836147] [2021-11-07 01:36:36,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:36:36,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:36:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:36:36,816 INFO L87 Difference]: Start difference. First operand has 3567 states, 3561 states have (on average 1.88767200224656) internal successors, (6722), 3566 states have internal predecessors, (6722), 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 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:37,011 INFO L93 Difference]: Finished difference Result 3586 states and 6745 transitions. [2021-11-07 01:36:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:36:37,013 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 53 [2021-11-07 01:36:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:37,082 INFO L225 Difference]: With dead ends: 3586 [2021-11-07 01:36:37,082 INFO L226 Difference]: Without dead ends: 3563 [2021-11-07 01:36:37,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:36:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-11-07 01:36:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3563. [2021-11-07 01:36:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3558 states have (on average 1.8858909499718943) internal successors, (6710), 3562 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 6710 transitions. [2021-11-07 01:36:37,343 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 6710 transitions. Word has length 53 [2021-11-07 01:36:37,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:37,346 INFO L470 AbstractCegarLoop]: Abstraction has 3563 states and 6710 transitions. [2021-11-07 01:36:37,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 6710 transitions. [2021-11-07 01:36:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:36:37,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:37,354 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] [2021-11-07 01:36:37,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:37,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:37,572 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:36:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:37,573 INFO L85 PathProgramCache]: Analyzing trace with hash -268945577, now seen corresponding path program 1 times [2021-11-07 01:36:37,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:37,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425950570] [2021-11-07 01:36:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:37,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:37,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:37,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:37,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:36:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:38,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:36:38,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:38,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:38,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:38,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425950570] [2021-11-07 01:36:38,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425950570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:38,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:38,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:36:38,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124527293] [2021-11-07 01:36:38,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:38,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:38,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:38,587 INFO L87 Difference]: Start difference. First operand 3563 states and 6710 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:39,121 INFO L93 Difference]: Finished difference Result 10609 states and 19987 transitions. [2021-11-07 01:36:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:39,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:36:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:39,184 INFO L225 Difference]: With dead ends: 10609 [2021-11-07 01:36:39,184 INFO L226 Difference]: Without dead ends: 7059 [2021-11-07 01:36:39,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2021-11-07 01:36:39,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 3563. [2021-11-07 01:36:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3558 states have (on average 1.8839235525576166) internal successors, (6703), 3562 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 6703 transitions. [2021-11-07 01:36:39,410 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 6703 transitions. Word has length 55 [2021-11-07 01:36:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:39,411 INFO L470 AbstractCegarLoop]: Abstraction has 3563 states and 6703 transitions. [2021-11-07 01:36:39,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 6703 transitions. [2021-11-07 01:36:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:36:39,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:39,418 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:39,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:39,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:39,635 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:36:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1960333836, now seen corresponding path program 1 times [2021-11-07 01:36:39,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:39,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062343770] [2021-11-07 01:36:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:39,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:39,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:39,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:39,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:36:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:40,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:36:40,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:40,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:40,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:40,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062343770] [2021-11-07 01:36:40,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062343770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:40,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:40,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:36:40,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562607801] [2021-11-07 01:36:40,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:36:40,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:36:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:36:40,715 INFO L87 Difference]: Start difference. First operand 3563 states and 6703 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:42,990 INFO L93 Difference]: Finished difference Result 24416 states and 45973 transitions. [2021-11-07 01:36:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:36:42,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:36:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:43,139 INFO L225 Difference]: With dead ends: 24416 [2021-11-07 01:36:43,140 INFO L226 Difference]: Without dead ends: 20875 [2021-11-07 01:36:43,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:36:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20875 states. [2021-11-07 01:36:43,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20875 to 3541. [2021-11-07 01:36:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3536 states have (on average 1.8812217194570136) internal successors, (6652), 3540 states have internal predecessors, (6652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 6652 transitions. [2021-11-07 01:36:43,595 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 6652 transitions. Word has length 61 [2021-11-07 01:36:43,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:43,596 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 6652 transitions. [2021-11-07 01:36:43,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 6652 transitions. [2021-11-07 01:36:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:36:43,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:43,603 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] [2021-11-07 01:36:43,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:43,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:43,820 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:36:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:43,821 INFO L85 PathProgramCache]: Analyzing trace with hash 421819669, now seen corresponding path program 1 times [2021-11-07 01:36:43,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:43,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900405941] [2021-11-07 01:36:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:43,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:43,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:43,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:43,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:36:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:44,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:36:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:44,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:44,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:44,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900405941] [2021-11-07 01:36:44,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900405941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:44,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:44,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:36:44,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053277839] [2021-11-07 01:36:44,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:44,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:44,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:44,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:44,880 INFO L87 Difference]: Start difference. First operand 3541 states and 6652 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:45,561 INFO L93 Difference]: Finished difference Result 10520 states and 19791 transitions. [2021-11-07 01:36:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:45,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 63 [2021-11-07 01:36:45,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:45,592 INFO L225 Difference]: With dead ends: 10520 [2021-11-07 01:36:45,592 INFO L226 Difference]: Without dead ends: 7001 [2021-11-07 01:36:45,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-11-07 01:36:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 3541. [2021-11-07 01:36:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3536 states have (on average 1.8781108597285068) internal successors, (6641), 3540 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 6641 transitions. [2021-11-07 01:36:45,943 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 6641 transitions. Word has length 63 [2021-11-07 01:36:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:45,944 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 6641 transitions. [2021-11-07 01:36:45,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 6641 transitions. [2021-11-07 01:36:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:36:45,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:45,952 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] [2021-11-07 01:36:45,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:46,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:46,167 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:36:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1787077270, now seen corresponding path program 1 times [2021-11-07 01:36:46,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:46,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264381499] [2021-11-07 01:36:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:46,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:46,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:46,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:46,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:36:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:46,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:36:46,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:47,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:47,381 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 01:36:47,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:47,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264381499] [2021-11-07 01:36:47,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264381499] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:47,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:47,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:36:47,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282307064] [2021-11-07 01:36:47,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:36:47,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:36:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:36:47,385 INFO L87 Difference]: Start difference. First operand 3541 states and 6641 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 01:36:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:51,175 INFO L93 Difference]: Finished difference Result 38195 states and 71885 transitions. [2021-11-07 01:36:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:36:51,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 69 [2021-11-07 01:36:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:51,331 INFO L225 Difference]: With dead ends: 38195 [2021-11-07 01:36:51,332 INFO L226 Difference]: Without dead ends: 34679 [2021-11-07 01:36:51,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:36:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34679 states. [2021-11-07 01:36:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34679 to 3543. [2021-11-07 01:36:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3538 states have (on average 1.876201243640475) internal successors, (6638), 3542 states have internal predecessors, (6638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 6638 transitions. [2021-11-07 01:36:51,892 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 6638 transitions. Word has length 69 [2021-11-07 01:36:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:51,892 INFO L470 AbstractCegarLoop]: Abstraction has 3543 states and 6638 transitions. [2021-11-07 01:36:51,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 01:36:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 6638 transitions. [2021-11-07 01:36:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:36:51,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:51,898 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] [2021-11-07 01:36:51,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:52,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:52,116 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:36:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1271642813, now seen corresponding path program 1 times [2021-11-07 01:36:52,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:52,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796395927] [2021-11-07 01:36:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:52,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:52,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:52,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:52,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:36:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:52,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:36:52,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:53,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:53,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:53,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796395927] [2021-11-07 01:36:53,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796395927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:53,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:53,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:36:53,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836265102] [2021-11-07 01:36:53,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:36:53,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:36:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:36:53,297 INFO L87 Difference]: Start difference. First operand 3543 states and 6638 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2021-11-07 01:36:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:56,206 INFO L93 Difference]: Finished difference Result 38163 states and 71806 transitions. [2021-11-07 01:36:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:36:56,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) Word has length 71 [2021-11-07 01:36:56,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:56,336 INFO L225 Difference]: With dead ends: 38163 [2021-11-07 01:36:56,336 INFO L226 Difference]: Without dead ends: 34647 [2021-11-07 01:36:56,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:36:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34647 states. [2021-11-07 01:36:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34647 to 3547. [2021-11-07 01:36:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3542 states have (on average 1.8749294184076792) internal successors, (6641), 3546 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 6641 transitions. [2021-11-07 01:36:56,836 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 6641 transitions. Word has length 71 [2021-11-07 01:36:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:56,836 INFO L470 AbstractCegarLoop]: Abstraction has 3547 states and 6641 transitions. [2021-11-07 01:36:56,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2021-11-07 01:36:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 6641 transitions. [2021-11-07 01:36:56,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:36:56,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:56,840 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 01:36:56,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 01:36:57,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:57,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:36:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1682583062, now seen corresponding path program 1 times [2021-11-07 01:36:57,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:57,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677300225] [2021-11-07 01:36:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:57,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:57,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:57,163 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:57,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:36:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:57,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:36:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:57,975 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 01:36:57,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:58,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:58,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677300225] [2021-11-07 01:36:58,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677300225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:58,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:58,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:36:58,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682778905] [2021-11-07 01:36:58,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:36:58,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:36:58,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:58,195 INFO L87 Difference]: Start difference. First operand 3547 states and 6641 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:58,408 INFO L93 Difference]: Finished difference Result 7042 states and 13213 transitions. [2021-11-07 01:36:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:36:58,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 01:36:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:58,420 INFO L225 Difference]: With dead ends: 7042 [2021-11-07 01:36:58,420 INFO L226 Difference]: Without dead ends: 3526 [2021-11-07 01:36:58,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:36:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3526 states. [2021-11-07 01:36:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3526 to 3526. [2021-11-07 01:36:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3521 states have (on average 1.8753195115024142) internal successors, (6603), 3525 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 6603 transitions. [2021-11-07 01:36:58,696 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 6603 transitions. Word has length 73 [2021-11-07 01:36:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:58,696 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 6603 transitions. [2021-11-07 01:36:58,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 6603 transitions. [2021-11-07 01:36:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:36:58,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:58,701 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 01:36:58,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:58,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:58,914 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:36:58,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1944647102, now seen corresponding path program 1 times [2021-11-07 01:36:58,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:58,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395879887] [2021-11-07 01:36:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:58,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:58,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:58,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:58,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:36:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:59,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:36:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:59,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:00,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:00,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395879887] [2021-11-07 01:37:00,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395879887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:00,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:00,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:37:00,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804322751] [2021-11-07 01:37:00,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:00,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:00,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:00,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:00,012 INFO L87 Difference]: Start difference. First operand 3526 states and 6603 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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 01:37:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:00,394 INFO L93 Difference]: Finished difference Result 6986 states and 13116 transitions. [2021-11-07 01:37:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:00,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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 74 [2021-11-07 01:37:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:00,403 INFO L225 Difference]: With dead ends: 6986 [2021-11-07 01:37:00,403 INFO L226 Difference]: Without dead ends: 3501 [2021-11-07 01:37:00,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:37:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2021-11-07 01:37:00,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 3501. [2021-11-07 01:37:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3496 states have (on average 1.8761441647597255) internal successors, (6559), 3500 states have internal predecessors, (6559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 6559 transitions. [2021-11-07 01:37:00,783 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 6559 transitions. Word has length 74 [2021-11-07 01:37:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:00,783 INFO L470 AbstractCegarLoop]: Abstraction has 3501 states and 6559 transitions. [2021-11-07 01:37:00,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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 01:37:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 6559 transitions. [2021-11-07 01:37:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:37:00,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:00,794 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 01:37:00,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:01,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:01,013 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:01,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2088035865, now seen corresponding path program 1 times [2021-11-07 01:37:01,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:01,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223037212] [2021-11-07 01:37:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:01,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:01,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:01,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:01,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:37:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:01,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:37:01,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:01,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:02,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:02,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223037212] [2021-11-07 01:37:02,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223037212] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:02,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:02,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:37:02,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91148324] [2021-11-07 01:37:02,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:02,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:02,198 INFO L87 Difference]: Start difference. First operand 3501 states and 6559 transitions. Second operand has 4 states, 4 states have (on average 20.25) 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 01:37:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:02,533 INFO L93 Difference]: Finished difference Result 6961 states and 13072 transitions. [2021-11-07 01:37:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) 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 75 [2021-11-07 01:37:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:02,543 INFO L225 Difference]: With dead ends: 6961 [2021-11-07 01:37:02,543 INFO L226 Difference]: Without dead ends: 3498 [2021-11-07 01:37:02,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:02,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-11-07 01:37:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3498. [2021-11-07 01:37:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3493 states have (on average 1.8754652161465788) internal successors, (6551), 3497 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 6551 transitions. [2021-11-07 01:37:02,979 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 6551 transitions. Word has length 75 [2021-11-07 01:37:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:02,979 INFO L470 AbstractCegarLoop]: Abstraction has 3498 states and 6551 transitions. [2021-11-07 01:37:02,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) 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 01:37:02,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 6551 transitions. [2021-11-07 01:37:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:37:02,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:02,992 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 01:37:03,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:03,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:03,210 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:03,210 INFO L85 PathProgramCache]: Analyzing trace with hash -54124472, now seen corresponding path program 1 times [2021-11-07 01:37:03,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:03,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038661392] [2021-11-07 01:37:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:03,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:03,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:03,212 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:03,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:37:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:03,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:37:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:04,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:04,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:04,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038661392] [2021-11-07 01:37:04,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038661392] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:04,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:04,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:37:04,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117427753] [2021-11-07 01:37:04,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:37:04,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:37:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:37:04,441 INFO L87 Difference]: Start difference. First operand 3498 states and 6551 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:04,729 INFO L93 Difference]: Finished difference Result 6952 states and 13054 transitions. [2021-11-07 01:37:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:04,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:37:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:04,735 INFO L225 Difference]: With dead ends: 6952 [2021-11-07 01:37:04,735 INFO L226 Difference]: Without dead ends: 3496 [2021-11-07 01:37:04,742 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 01:37:04,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-11-07 01:37:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3496. [2021-11-07 01:37:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3491 states have (on average 1.874820968203953) internal successors, (6545), 3495 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 6545 transitions. [2021-11-07 01:37:04,952 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 6545 transitions. Word has length 76 [2021-11-07 01:37:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:04,953 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 6545 transitions. [2021-11-07 01:37:04,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 6545 transitions. [2021-11-07 01:37:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:37:04,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:04,958 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 01:37:04,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:05,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:05,177 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:05,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:05,178 INFO L85 PathProgramCache]: Analyzing trace with hash 886791828, now seen corresponding path program 1 times [2021-11-07 01:37:05,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:05,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851171562] [2021-11-07 01:37:05,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:05,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:05,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:05,180 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:05,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:37:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:05,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:37:05,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:06,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:06,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:06,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851171562] [2021-11-07 01:37:06,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851171562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:06,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:06,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:37:06,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808892636] [2021-11-07 01:37:06,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:37:06,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:06,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:37:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:37:06,386 INFO L87 Difference]: Start difference. First operand 3496 states and 6545 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:06,738 INFO L93 Difference]: Finished difference Result 6945 states and 13039 transitions. [2021-11-07 01:37:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:06,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 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 01:37:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:06,744 INFO L225 Difference]: With dead ends: 6945 [2021-11-07 01:37:06,744 INFO L226 Difference]: Without dead ends: 3494 [2021-11-07 01:37:06,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:37:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2021-11-07 01:37:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3494. [2021-11-07 01:37:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3494 states, 3489 states have (on average 1.8741759816566352) internal successors, (6539), 3493 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 6539 transitions. [2021-11-07 01:37:07,068 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 6539 transitions. Word has length 77 [2021-11-07 01:37:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:07,069 INFO L470 AbstractCegarLoop]: Abstraction has 3494 states and 6539 transitions. [2021-11-07 01:37:07,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 6539 transitions. [2021-11-07 01:37:07,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:37:07,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:07,073 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 01:37:07,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:07,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:07,286 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1398143693, now seen corresponding path program 1 times [2021-11-07 01:37:07,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:07,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215908973] [2021-11-07 01:37:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:07,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:07,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:07,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:07,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:37:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:37:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:08,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:08,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:08,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215908973] [2021-11-07 01:37:08,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215908973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:08,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:08,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:37:08,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137452428] [2021-11-07 01:37:08,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:08,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:08,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:08,849 INFO L87 Difference]: Start difference. First operand 3494 states and 6539 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:13,058 INFO L93 Difference]: Finished difference Result 11856 states and 22263 transitions. [2021-11-07 01:37:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 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 01:37:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:13,072 INFO L225 Difference]: With dead ends: 11856 [2021-11-07 01:37:13,072 INFO L226 Difference]: Without dead ends: 8413 [2021-11-07 01:37:13,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:37:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8413 states. [2021-11-07 01:37:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8413 to 3494. [2021-11-07 01:37:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3494 states, 3489 states have (on average 1.8082545141874462) internal successors, (6309), 3493 states have internal predecessors, (6309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 6309 transitions. [2021-11-07 01:37:13,477 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 6309 transitions. Word has length 78 [2021-11-07 01:37:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:13,477 INFO L470 AbstractCegarLoop]: Abstraction has 3494 states and 6309 transitions. [2021-11-07 01:37:13,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:13,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 6309 transitions. [2021-11-07 01:37:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:37:13,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:13,482 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:13,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:13,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:13,700 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:13,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:13,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1208194975, now seen corresponding path program 1 times [2021-11-07 01:37:13,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:13,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633607094] [2021-11-07 01:37:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:13,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:13,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:13,703 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:13,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:37:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:14,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:15,135 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 01:37:15,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:15,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633607094] [2021-11-07 01:37:15,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633607094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:15,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:15,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:37:15,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955592440] [2021-11-07 01:37:15,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:15,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:15,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:15,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:15,138 INFO L87 Difference]: Start difference. First operand 3494 states and 6309 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 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 01:37:17,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:17,444 INFO L93 Difference]: Finished difference Result 9372 states and 17131 transitions. [2021-11-07 01:37:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:37:17,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 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 86 [2021-11-07 01:37:17,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:17,454 INFO L225 Difference]: With dead ends: 9372 [2021-11-07 01:37:17,454 INFO L226 Difference]: Without dead ends: 5956 [2021-11-07 01:37:17,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:37:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5956 states. [2021-11-07 01:37:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5956 to 3442. [2021-11-07 01:37:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3437 states have (on average 1.808844922897876) internal successors, (6217), 3441 states have internal predecessors, (6217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 6217 transitions. [2021-11-07 01:37:17,715 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 6217 transitions. Word has length 86 [2021-11-07 01:37:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:17,716 INFO L470 AbstractCegarLoop]: Abstraction has 3442 states and 6217 transitions. [2021-11-07 01:37:17,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 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 01:37:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 6217 transitions. [2021-11-07 01:37:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:37:17,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:17,720 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:17,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:37:17,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:17,963 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:17,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:17,964 INFO L85 PathProgramCache]: Analyzing trace with hash 85915244, now seen corresponding path program 1 times [2021-11-07 01:37:17,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:17,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472995829] [2021-11-07 01:37:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:17,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:17,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:17,966 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:17,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:37:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:18,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:37:18,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:19,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:21,725 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 01:37:21,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:21,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472995829] [2021-11-07 01:37:21,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472995829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:21,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:21,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:37:21,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817397752] [2021-11-07 01:37:21,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:21,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:21,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:21,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:21,728 INFO L87 Difference]: Start difference. First operand 3442 states and 6217 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:25,565 INFO L93 Difference]: Finished difference Result 11035 states and 20067 transitions. [2021-11-07 01:37:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 01:37:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:25,586 INFO L225 Difference]: With dead ends: 11035 [2021-11-07 01:37:25,586 INFO L226 Difference]: Without dead ends: 7663 [2021-11-07 01:37:25,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:37:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7663 states. [2021-11-07 01:37:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7663 to 4959. [2021-11-07 01:37:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4959 states, 4954 states have (on average 1.8078320549051272) internal successors, (8956), 4958 states have internal predecessors, (8956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 8956 transitions. [2021-11-07 01:37:26,189 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 8956 transitions. Word has length 89 [2021-11-07 01:37:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:26,189 INFO L470 AbstractCegarLoop]: Abstraction has 4959 states and 8956 transitions. [2021-11-07 01:37:26,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 8956 transitions. [2021-11-07 01:37:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:37:26,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:26,194 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:26,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:26,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:26,394 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:26,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:26,395 INFO L85 PathProgramCache]: Analyzing trace with hash 690395627, now seen corresponding path program 1 times [2021-11-07 01:37:26,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:26,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281774105] [2021-11-07 01:37:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:26,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:26,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:26,398 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:26,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:37:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:27,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:37:27,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:27,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:28,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:28,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281774105] [2021-11-07 01:37:28,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281774105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:28,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:28,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:37:28,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243353208] [2021-11-07 01:37:28,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:28,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:28,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:28,113 INFO L87 Difference]: Start difference. First operand 4959 states and 8956 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 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 01:37:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:33,172 INFO L93 Difference]: Finished difference Result 19636 states and 35781 transitions. [2021-11-07 01:37:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:37:33,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 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 90 [2021-11-07 01:37:33,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:33,193 INFO L225 Difference]: With dead ends: 19636 [2021-11-07 01:37:33,193 INFO L226 Difference]: Without dead ends: 14746 [2021-11-07 01:37:33,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:37:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14746 states. [2021-11-07 01:37:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14746 to 4965. [2021-11-07 01:37:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 4960 states have (on average 1.8068548387096774) internal successors, (8962), 4964 states have internal predecessors, (8962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 8962 transitions. [2021-11-07 01:37:33,672 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 8962 transitions. Word has length 90 [2021-11-07 01:37:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:33,672 INFO L470 AbstractCegarLoop]: Abstraction has 4965 states and 8962 transitions. [2021-11-07 01:37:33,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 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 01:37:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 8962 transitions. [2021-11-07 01:37:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:37:33,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:33,676 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:33,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:37:33,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:33,890 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash 293271818, now seen corresponding path program 1 times [2021-11-07 01:37:33,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:33,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845874085] [2021-11-07 01:37:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:33,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:33,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:33,893 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:33,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:37:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:34,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:37:34,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:35,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:35,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:35,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845874085] [2021-11-07 01:37:35,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845874085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:35,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:35,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:35,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495040995] [2021-11-07 01:37:35,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:35,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:35,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:35,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:35,578 INFO L87 Difference]: Start difference. First operand 4965 states and 8962 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:39,537 INFO L93 Difference]: Finished difference Result 14131 states and 25736 transitions. [2021-11-07 01:37:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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 91 [2021-11-07 01:37:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:39,551 INFO L225 Difference]: With dead ends: 14131 [2021-11-07 01:37:39,552 INFO L226 Difference]: Without dead ends: 9222 [2021-11-07 01:37:39,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9222 states. [2021-11-07 01:37:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9222 to 6509. [2021-11-07 01:37:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6504 states have (on average 1.765990159901599) internal successors, (11486), 6508 states have internal predecessors, (11486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:40,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 11486 transitions. [2021-11-07 01:37:40,178 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 11486 transitions. Word has length 91 [2021-11-07 01:37:40,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:40,178 INFO L470 AbstractCegarLoop]: Abstraction has 6509 states and 11486 transitions. [2021-11-07 01:37:40,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 11486 transitions. [2021-11-07 01:37:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:37:40,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:40,181 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:40,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:40,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:40,388 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash 421951746, now seen corresponding path program 1 times [2021-11-07 01:37:40,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:40,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543316993] [2021-11-07 01:37:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:40,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:40,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:40,390 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:40,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:37:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:41,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:37:41,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:41,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:41,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:41,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543316993] [2021-11-07 01:37:41,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543316993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:41,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:41,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:37:41,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065696683] [2021-11-07 01:37:41,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:37:41,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:41,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:37:41,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:37:41,983 INFO L87 Difference]: Start difference. First operand 6509 states and 11486 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:45,237 INFO L93 Difference]: Finished difference Result 43226 states and 76894 transitions. [2021-11-07 01:37:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:37:45,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 01:37:45,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:45,294 INFO L225 Difference]: With dead ends: 43226 [2021-11-07 01:37:45,294 INFO L226 Difference]: Without dead ends: 36782 [2021-11-07 01:37:45,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36782 states. [2021-11-07 01:37:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36782 to 9976. [2021-11-07 01:37:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9976 states, 9971 states have (on average 1.7761508374285429) internal successors, (17710), 9975 states have internal predecessors, (17710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9976 states to 9976 states and 17710 transitions. [2021-11-07 01:37:46,700 INFO L78 Accepts]: Start accepts. Automaton has 9976 states and 17710 transitions. Word has length 93 [2021-11-07 01:37:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:46,700 INFO L470 AbstractCegarLoop]: Abstraction has 9976 states and 17710 transitions. [2021-11-07 01:37:46,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 9976 states and 17710 transitions. [2021-11-07 01:37:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:37:46,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:46,704 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:46,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:46,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:46,922 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:46,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:46,922 INFO L85 PathProgramCache]: Analyzing trace with hash 349565188, now seen corresponding path program 1 times [2021-11-07 01:37:46,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:46,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755046541] [2021-11-07 01:37:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:46,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:46,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:46,924 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:46,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:37:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:48,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:37:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:48,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:48,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:48,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755046541] [2021-11-07 01:37:48,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755046541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:48,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:48,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:37:48,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291972981] [2021-11-07 01:37:48,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:48,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:48,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:48,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:48,675 INFO L87 Difference]: Start difference. First operand 9976 states and 17710 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:51,395 INFO L93 Difference]: Finished difference Result 20895 states and 37218 transitions. [2021-11-07 01:37:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:37:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 01:37:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:51,417 INFO L225 Difference]: With dead ends: 20895 [2021-11-07 01:37:51,417 INFO L226 Difference]: Without dead ends: 15592 [2021-11-07 01:37:51,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:37:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15592 states. [2021-11-07 01:37:52,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15592 to 9962. [2021-11-07 01:37:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9962 states, 9957 states have (on average 1.7758360952094003) internal successors, (17682), 9961 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9962 states to 9962 states and 17682 transitions. [2021-11-07 01:37:52,262 INFO L78 Accepts]: Start accepts. Automaton has 9962 states and 17682 transitions. Word has length 93 [2021-11-07 01:37:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:52,262 INFO L470 AbstractCegarLoop]: Abstraction has 9962 states and 17682 transitions. [2021-11-07 01:37:52,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 9962 states and 17682 transitions. [2021-11-07 01:37:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:37:52,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:52,267 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:52,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:52,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:52,487 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash 736926462, now seen corresponding path program 1 times [2021-11-07 01:37:52,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:52,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546036303] [2021-11-07 01:37:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:52,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:52,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:52,489 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:52,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:37:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:53,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:53,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:53,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:54,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:54,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546036303] [2021-11-07 01:37:54,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546036303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:54,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:54,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:37:54,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258648805] [2021-11-07 01:37:54,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:54,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:54,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:54,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:54,340 INFO L87 Difference]: Start difference. First operand 9962 states and 17682 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:55,771 INFO L93 Difference]: Finished difference Result 24946 states and 44302 transitions. [2021-11-07 01:37:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:55,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 100 [2021-11-07 01:37:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:55,795 INFO L225 Difference]: With dead ends: 24946 [2021-11-07 01:37:55,795 INFO L226 Difference]: Without dead ends: 16795 [2021-11-07 01:37:55,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 197 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 01:37:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-11-07 01:37:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 16780. [2021-11-07 01:37:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16780 states, 16775 states have (on average 1.7828315946348734) internal successors, (29907), 16779 states have internal predecessors, (29907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16780 states to 16780 states and 29907 transitions. [2021-11-07 01:37:57,267 INFO L78 Accepts]: Start accepts. Automaton has 16780 states and 29907 transitions. Word has length 100 [2021-11-07 01:37:57,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:57,267 INFO L470 AbstractCegarLoop]: Abstraction has 16780 states and 29907 transitions. [2021-11-07 01:37:57,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 16780 states and 29907 transitions. [2021-11-07 01:37:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:37:57,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:57,271 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:57,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:57,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:57,486 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:37:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1299567761, now seen corresponding path program 1 times [2021-11-07 01:37:57,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:57,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119214168] [2021-11-07 01:37:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:57,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:57,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:57,490 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:57,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:37:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:58,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:58,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:59,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:59,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:59,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119214168] [2021-11-07 01:37:59,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119214168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:59,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:59,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:37:59,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917903255] [2021-11-07 01:37:59,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:59,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:59,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:59,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:59,632 INFO L87 Difference]: Start difference. First operand 16780 states and 29907 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:02,116 INFO L93 Difference]: Finished difference Result 44132 states and 78595 transitions. [2021-11-07 01:38:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:02,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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 101 [2021-11-07 01:38:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:02,159 INFO L225 Difference]: With dead ends: 44132 [2021-11-07 01:38:02,159 INFO L226 Difference]: Without dead ends: 30235 [2021-11-07 01:38:02,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 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 01:38:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30235 states. [2021-11-07 01:38:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30235 to 30220. [2021-11-07 01:38:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30220 states, 30215 states have (on average 1.7863643885487341) internal successors, (53975), 30219 states have internal predecessors, (53975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30220 states to 30220 states and 53975 transitions. [2021-11-07 01:38:04,747 INFO L78 Accepts]: Start accepts. Automaton has 30220 states and 53975 transitions. Word has length 101 [2021-11-07 01:38:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:04,747 INFO L470 AbstractCegarLoop]: Abstraction has 30220 states and 53975 transitions. [2021-11-07 01:38:04,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30220 states and 53975 transitions. [2021-11-07 01:38:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:38:04,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:04,751 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:04,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:04,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:04,952 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:38:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1226545081, now seen corresponding path program 1 times [2021-11-07 01:38:04,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:04,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084231579] [2021-11-07 01:38:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:04,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:04,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:04,956 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:04,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:38:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:06,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:06,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:07,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:07,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084231579] [2021-11-07 01:38:07,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084231579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:07,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:07,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:38:07,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22512547] [2021-11-07 01:38:07,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:07,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:07,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:07,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:07,016 INFO L87 Difference]: Start difference. First operand 30220 states and 53975 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:11,857 INFO L93 Difference]: Finished difference Result 82112 states and 146380 transitions. [2021-11-07 01:38:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:11,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 102 [2021-11-07 01:38:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:11,967 INFO L225 Difference]: With dead ends: 82112 [2021-11-07 01:38:11,967 INFO L226 Difference]: Without dead ends: 56703 [2021-11-07 01:38:11,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 201 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 01:38:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56703 states. [2021-11-07 01:38:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56703 to 56688. [2021-11-07 01:38:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56688 states, 56683 states have (on average 1.7867614628724662) internal successors, (101279), 56687 states have internal predecessors, (101279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56688 states to 56688 states and 101279 transitions. [2021-11-07 01:38:17,273 INFO L78 Accepts]: Start accepts. Automaton has 56688 states and 101279 transitions. Word has length 102 [2021-11-07 01:38:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:17,274 INFO L470 AbstractCegarLoop]: Abstraction has 56688 states and 101279 transitions. [2021-11-07 01:38:17,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 56688 states and 101279 transitions. [2021-11-07 01:38:17,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:38:17,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:17,278 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:17,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:17,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:17,505 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:38:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1372191764, now seen corresponding path program 1 times [2021-11-07 01:38:17,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:17,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392205137] [2021-11-07 01:38:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:17,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:17,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:17,508 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:17,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42ac3fd5-ca1a-421e-b13c-93263e593c38/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:38:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:18,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:18,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:19,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:19,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:19,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392205137] [2021-11-07 01:38:19,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392205137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:19,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:19,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:38:19,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602545237] [2021-11-07 01:38:19,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:19,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:19,473 INFO L87 Difference]: Start difference. First operand 56688 states and 101279 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:29,385 INFO L93 Difference]: Finished difference Result 157248 states and 280205 transitions. [2021-11-07 01:38:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 01:38:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:29,616 INFO L225 Difference]: With dead ends: 157248 [2021-11-07 01:38:29,616 INFO L226 Difference]: Without dead ends: 108795 [2021-11-07 01:38:29,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 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 01:38:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108795 states.