./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.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_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/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_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/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_e115309f-b9f4-491a-ab66-4cc04de6113a/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 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:42,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:42,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:42,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:42,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:42,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:42,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:42,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:42,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:42,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:42,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:42,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:42,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:42,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:42,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:42,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:42,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:42,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:42,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:42,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:42,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:42,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:42,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:42,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:42,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:42,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:42,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:42,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:42,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:42,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:42,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:42,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:42,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:42,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:42,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:42,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:42,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:42,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:42,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:42,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:42,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:42,848 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:08:42,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:42,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:42,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:42,898 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:42,898 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:42,899 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:42,899 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:08:42,899 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:42,905 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:42,906 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:08:42,907 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:08:42,907 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:42,907 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:08:42,907 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:08:42,908 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:08:42,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:42,909 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:08:42,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:08:42,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:08:42,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:42,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:08:42,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:42,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:08:42,910 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:42,911 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:08:42,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:08:42,911 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:42,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:08:42,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:42,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:42,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:42,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:42,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:42,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:08:42,914 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:08:42,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:08:42,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:08:42,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:42,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:42,915 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_e115309f-b9f4-491a-ab66-4cc04de6113a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d [2021-11-07 01:08:43,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:43,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:43,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:43,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:43,246 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:43,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-07 01:08:43,336 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/data/a0679c816/2a733357d77a44e7bc8ba91dfb7bb835/FLAG658e40dda [2021-11-07 01:08:43,998 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:43,999 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-07 01:08:44,045 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/data/a0679c816/2a733357d77a44e7bc8ba91dfb7bb835/FLAG658e40dda [2021-11-07 01:08:44,163 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/data/a0679c816/2a733357d77a44e7bc8ba91dfb7bb835 [2021-11-07 01:08:44,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:44,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:44,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:44,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:44,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:44,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:44" (1/1) ... [2021-11-07 01:08:44,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376da3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:44, skipping insertion in model container [2021-11-07 01:08:44,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:44" (1/1) ... [2021-11-07 01:08:44,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:44,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:44,871 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_e115309f-b9f4-491a-ab66-4cc04de6113a/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-07 01:08:44,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:44,891 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 01:08:44,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@144ad402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:44, skipping insertion in model container [2021-11-07 01:08:44,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:44,893 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:08:44,895 INFO L168 Benchmark]: Toolchain (without parser) took 725.49 ms. Allocated memory is still 94.4 MB. Free memory was 70.5 MB in the beginning and 54.5 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:44,896 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 94.4 MB. Free memory is still 69.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:08:44,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 722.85 ms. Allocated memory is still 94.4 MB. Free memory was 70.2 MB in the beginning and 54.5 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:44,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 94.4 MB. Free memory is still 69.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 722.85 ms. Allocated memory is still 94.4 MB. Free memory was 70.2 MB in the beginning and 54.5 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 534]: 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_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/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_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/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_e115309f-b9f4-491a-ab66-4cc04de6113a/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 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:47,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:47,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:47,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:47,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:47,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:47,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:47,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:47,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:47,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:47,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:47,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:47,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:47,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:47,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:47,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:47,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:47,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:47,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:47,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:47,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:47,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:47,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:47,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:47,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:47,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:47,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:47,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:47,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:47,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:47,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:47,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:47,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:47,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:47,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:47,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:47,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:47,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:47,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:47,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:47,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:47,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:08:47,400 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:47,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:47,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:47,402 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:47,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:47,403 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:47,403 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:47,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:47,404 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:47,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:47,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:08:47,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:08:47,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:47,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:08:47,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:47,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:08:47,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:47,408 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:08:47,408 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:08:47,408 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:08:47,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:08:47,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:47,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:08:47,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:47,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:08:47,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:47,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:47,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:47,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:47,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:08:47,411 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:08:47,411 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:47,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:08:47,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:47,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:47,413 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_e115309f-b9f4-491a-ab66-4cc04de6113a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2156ba1e79a86c856553f139302f2b9940a34efa4e31eb139d6bea893c29b00d [2021-11-07 01:08:47,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:47,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:47,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:47,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:47,792 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:47,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-07 01:08:47,876 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/data/65c717107/297e8eb1d9044ba78425d9d720fbd72f/FLAG2ab9729fd [2021-11-07 01:08:48,531 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:48,532 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c [2021-11-07 01:08:48,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/data/65c717107/297e8eb1d9044ba78425d9d720fbd72f/FLAG2ab9729fd [2021-11-07 01:08:48,739 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/data/65c717107/297e8eb1d9044ba78425d9d720fbd72f [2021-11-07 01:08:48,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:48,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:48,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:48,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:48,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:48,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:48" (1/1) ... [2021-11-07 01:08:48,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dac32e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:48, skipping insertion in model container [2021-11-07 01:08:48,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:48" (1/1) ... [2021-11-07 01:08:48,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:48,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:49,529 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_e115309f-b9f4-491a-ab66-4cc04de6113a/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-07 01:08:49,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:49,563 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:08:49,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:49,725 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_e115309f-b9f4-491a-ab66-4cc04de6113a/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-07 01:08:49,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:49,736 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:08:49,876 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_e115309f-b9f4-491a-ab66-4cc04de6113a/sv-benchmarks/c/product-lines/elevator_spec9_product11.cil.c[71954,71967] [2021-11-07 01:08:49,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:49,913 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:08:49,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49 WrapperNode [2021-11-07 01:08:49,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:49,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:49,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:08:49,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:08:49,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:49,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:50,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:08:50,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:08:50,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:08:50,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:08:50,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:08:50,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:08:50,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:08:50,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (1/1) ... [2021-11-07 01:08:50,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:50,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:08:50,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:08:50,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:08:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:08:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:08:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:08:50,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:08:58,992 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:08:58,992 INFO L299 CfgBuilder]: Removed 553 assume(true) statements. [2021-11-07 01:08:58,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:08:58 BoogieIcfgContainer [2021-11-07 01:08:58,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:08:59,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:08:59,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:08:59,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:08:59,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:08:48" (1/3) ... [2021-11-07 01:08:59,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471941ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:08:59, skipping insertion in model container [2021-11-07 01:08:59,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:49" (2/3) ... [2021-11-07 01:08:59,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471941ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:08:59, skipping insertion in model container [2021-11-07 01:08:59,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:08:58" (3/3) ... [2021-11-07 01:08:59,006 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product11.cil.c [2021-11-07 01:08:59,011 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:08:59,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:08:59,079 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:08:59,086 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 01:08:59,086 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:08:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 2412 states, 2406 states have (on average 1.895677472984206) internal successors, (4561), 2411 states have internal predecessors, (4561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:08:59,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:59,168 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] [2021-11-07 01:08:59,168 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 01:08:59,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:59,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1171138841, now seen corresponding path program 1 times [2021-11-07 01:08:59,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:59,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653612585] [2021-11-07 01:08:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:59,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:59,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:59,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:59,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:08:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:59,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:08:59,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:59,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:08:59,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:59,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653612585] [2021-11-07 01:08:59,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653612585] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:59,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:59,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:08:59,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311257847] [2021-11-07 01:08:59,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:08:59,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:08:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:08:59,893 INFO L87 Difference]: Start difference. First operand has 2412 states, 2406 states have (on average 1.895677472984206) internal successors, (4561), 2411 states have internal predecessors, (4561), 0 states have call successors, (0), 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 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 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 01:09:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:00,013 INFO L93 Difference]: Finished difference Result 2431 states and 4584 transitions. [2021-11-07 01:09:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:09:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-07 01:09:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:00,048 INFO L225 Difference]: With dead ends: 2431 [2021-11-07 01:09:00,048 INFO L226 Difference]: Without dead ends: 2408 [2021-11-07 01:09:00,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 84 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 01:09:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-11-07 01:09:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2408. [2021-11-07 01:09:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2403 states have (on average 1.8930503537245111) internal successors, (4549), 2407 states have internal predecessors, (4549), 0 states have call successors, (0), 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 01:09:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 4549 transitions. [2021-11-07 01:09:00,218 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 4549 transitions. Word has length 43 [2021-11-07 01:09:00,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:00,219 INFO L470 AbstractCegarLoop]: Abstraction has 2408 states and 4549 transitions. [2021-11-07 01:09:00,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 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 01:09:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 4549 transitions. [2021-11-07 01:09:00,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:09:00,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:00,226 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] [2021-11-07 01:09:00,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:09:00,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:00,444 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 01:09:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1377702245, now seen corresponding path program 1 times [2021-11-07 01:09:00,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:00,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120238098] [2021-11-07 01:09:00,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:00,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:00,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:00,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:00,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:09:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:00,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:00,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:00,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:01,099 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 01:09:01,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:01,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120238098] [2021-11-07 01:09:01,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120238098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:01,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:01,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:01,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838132712] [2021-11-07 01:09:01,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:01,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:01,109 INFO L87 Difference]: Start difference. First operand 2408 states and 4549 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:01,311 INFO L93 Difference]: Finished difference Result 4803 states and 9079 transitions. [2021-11-07 01:09:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:09:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:01,329 INFO L225 Difference]: With dead ends: 4803 [2021-11-07 01:09:01,329 INFO L226 Difference]: Without dead ends: 2408 [2021-11-07 01:09:01,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 01:09:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-11-07 01:09:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2408. [2021-11-07 01:09:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2403 states have (on average 1.8905534748231378) internal successors, (4543), 2407 states have internal predecessors, (4543), 0 states have call successors, (0), 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 01:09:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 4543 transitions. [2021-11-07 01:09:01,430 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 4543 transitions. Word has length 45 [2021-11-07 01:09:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:01,432 INFO L470 AbstractCegarLoop]: Abstraction has 2408 states and 4543 transitions. [2021-11-07 01:09:01,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 4543 transitions. [2021-11-07 01:09:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:09:01,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:01,444 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] [2021-11-07 01:09:01,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:01,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:01,661 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 01:09:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1166698833, now seen corresponding path program 1 times [2021-11-07 01:09:01,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:01,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555811035] [2021-11-07 01:09:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:01,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:01,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:01,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:01,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:09:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:02,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:02,166 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 01:09:02,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:02,309 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 01:09:02,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:02,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555811035] [2021-11-07 01:09:02,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555811035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:02,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:02,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:02,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652019036] [2021-11-07 01:09:02,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:02,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:02,312 INFO L87 Difference]: Start difference. First operand 2408 states and 4543 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 01:09:02,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:02,516 INFO L93 Difference]: Finished difference Result 4767 states and 9002 transitions. [2021-11-07 01:09:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:02,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 50 [2021-11-07 01:09:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:02,533 INFO L225 Difference]: With dead ends: 4767 [2021-11-07 01:09:02,533 INFO L226 Difference]: Without dead ends: 2381 [2021-11-07 01:09:02,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 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 01:09:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-11-07 01:09:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2021-11-07 01:09:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2376 states have (on average 1.8884680134680134) internal successors, (4487), 2380 states have internal predecessors, (4487), 0 states have call successors, (0), 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 01:09:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4487 transitions. [2021-11-07 01:09:02,666 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4487 transitions. Word has length 50 [2021-11-07 01:09:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:02,666 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 4487 transitions. [2021-11-07 01:09:02,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 01:09:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4487 transitions. [2021-11-07 01:09:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:09:02,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:02,670 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:02,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:02,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:02,886 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 01:09:02,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:02,886 INFO L85 PathProgramCache]: Analyzing trace with hash -505929873, now seen corresponding path program 1 times [2021-11-07 01:09:02,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:02,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847733805] [2021-11-07 01:09:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:02,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:02,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:02,890 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:02,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:09:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:03,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:03,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:03,437 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 01:09:03,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:03,576 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 01:09:03,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:03,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847733805] [2021-11-07 01:09:03,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847733805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:03,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:03,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:03,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588673621] [2021-11-07 01:09:03,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:03,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:03,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:03,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:03,580 INFO L87 Difference]: Start difference. First operand 2381 states and 4487 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:09:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:03,711 INFO L93 Difference]: Finished difference Result 4740 states and 8946 transitions. [2021-11-07 01:09:03,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:03,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 51 [2021-11-07 01:09:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:03,728 INFO L225 Difference]: With dead ends: 4740 [2021-11-07 01:09:03,728 INFO L226 Difference]: Without dead ends: 2381 [2021-11-07 01:09:03,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 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 01:09:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-11-07 01:09:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2021-11-07 01:09:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2376 states have (on average 1.885942760942761) internal successors, (4481), 2380 states have internal predecessors, (4481), 0 states have call successors, (0), 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 01:09:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4481 transitions. [2021-11-07 01:09:03,828 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4481 transitions. Word has length 51 [2021-11-07 01:09:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:03,829 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 4481 transitions. [2021-11-07 01:09:03,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:09:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4481 transitions. [2021-11-07 01:09:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:09:03,831 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:03,832 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:03,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:04,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:04,056 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 01:09:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:04,057 INFO L85 PathProgramCache]: Analyzing trace with hash -770642370, now seen corresponding path program 1 times [2021-11-07 01:09:04,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:04,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100611513] [2021-11-07 01:09:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:04,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:04,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:04,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:04,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:09:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:04,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:09:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:04,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:04,819 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 01:09:04,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:04,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100611513] [2021-11-07 01:09:04,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100611513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:04,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:04,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:09:04,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075022150] [2021-11-07 01:09:04,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:09:04,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:04,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:09:04,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:09:04,822 INFO L87 Difference]: Start difference. First operand 2381 states and 4481 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:05,002 INFO L93 Difference]: Finished difference Result 4734 states and 8929 transitions. [2021-11-07 01:09:05,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:09:05,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:09:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:05,018 INFO L225 Difference]: With dead ends: 4734 [2021-11-07 01:09:05,018 INFO L226 Difference]: Without dead ends: 2378 [2021-11-07 01:09:05,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 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 01:09:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-11-07 01:09:05,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2378. [2021-11-07 01:09:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2373 states have (on average 1.8849557522123894) internal successors, (4473), 2377 states have internal predecessors, (4473), 0 states have call successors, (0), 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 01:09:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 4473 transitions. [2021-11-07 01:09:05,118 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 4473 transitions. Word has length 56 [2021-11-07 01:09:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:05,118 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 4473 transitions. [2021-11-07 01:09:05,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 4473 transitions. [2021-11-07 01:09:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:09:05,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:05,121 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:05,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:05,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:05,335 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 01:09:05,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1186467438, now seen corresponding path program 1 times [2021-11-07 01:09:05,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:05,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121521808] [2021-11-07 01:09:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:05,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:05,338 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:05,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:09:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:05,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:09:05,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:05,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:06,147 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 01:09:06,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:06,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121521808] [2021-11-07 01:09:06,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121521808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:06,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:06,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:09:06,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554307573] [2021-11-07 01:09:06,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:06,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:06,150 INFO L87 Difference]: Start difference. First operand 2378 states and 4473 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:07,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:07,690 INFO L93 Difference]: Finished difference Result 8668 states and 16371 transitions. [2021-11-07 01:09:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:09:07,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:09:07,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:07,732 INFO L225 Difference]: With dead ends: 8668 [2021-11-07 01:09:07,732 INFO L226 Difference]: Without dead ends: 6321 [2021-11-07 01:09:07,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 01:09:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6321 states. [2021-11-07 01:09:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6321 to 2378. [2021-11-07 01:09:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2373 states have (on average 1.8419721871049304) internal successors, (4371), 2377 states have internal predecessors, (4371), 0 states have call successors, (0), 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 01:09:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 4371 transitions. [2021-11-07 01:09:07,928 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 4371 transitions. Word has length 57 [2021-11-07 01:09:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:07,929 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 4371 transitions. [2021-11-07 01:09:07,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 4371 transitions. [2021-11-07 01:09:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:09:07,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:07,932 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] [2021-11-07 01:09:07,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:08,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:08,145 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 01:09:08,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:08,146 INFO L85 PathProgramCache]: Analyzing trace with hash 246204418, now seen corresponding path program 1 times [2021-11-07 01:09:08,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:08,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651194251] [2021-11-07 01:09:08,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:08,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:08,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:08,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:08,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:09:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:08,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:09:08,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:08,853 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 01:09:08,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:09,065 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 01:09:09,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:09,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651194251] [2021-11-07 01:09:09,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651194251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:09,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:09,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:09:09,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766325840] [2021-11-07 01:09:09,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:09,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:09,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:09,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:09,068 INFO L87 Difference]: Start difference. First operand 2378 states and 4371 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:09:10,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:10,155 INFO L93 Difference]: Finished difference Result 6653 states and 12360 transitions. [2021-11-07 01:09:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:09:10,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-07 01:09:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:10,182 INFO L225 Difference]: With dead ends: 6653 [2021-11-07 01:09:10,183 INFO L226 Difference]: Without dead ends: 4324 [2021-11-07 01:09:10,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 124 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 01:09:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-11-07 01:09:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 2344. [2021-11-07 01:09:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2339 states have (on average 1.8422402736212056) internal successors, (4309), 2343 states have internal predecessors, (4309), 0 states have call successors, (0), 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 01:09:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 4309 transitions. [2021-11-07 01:09:10,327 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 4309 transitions. Word has length 65 [2021-11-07 01:09:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:10,327 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 4309 transitions. [2021-11-07 01:09:10,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:09:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 4309 transitions. [2021-11-07 01:09:10,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:09:10,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:10,330 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] [2021-11-07 01:09:10,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:10,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:10,544 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 01:09:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash 430279138, now seen corresponding path program 1 times [2021-11-07 01:09:10,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:10,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573398582] [2021-11-07 01:09:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:10,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:10,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:10,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:10,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:09:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:11,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:09:11,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:11,306 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 01:09:11,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:11,531 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 01:09:11,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:11,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573398582] [2021-11-07 01:09:11,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573398582] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:11,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:11,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:09:11,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986912231] [2021-11-07 01:09:11,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:09:11,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:11,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:09:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:09:11,534 INFO L87 Difference]: Start difference. First operand 2344 states and 4309 transitions. Second operand has 5 states, 5 states have (on average 13.4) 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 01:09:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:12,968 INFO L93 Difference]: Finished difference Result 9282 states and 17195 transitions. [2021-11-07 01:09:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:09:12,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) 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 67 [2021-11-07 01:09:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:12,995 INFO L225 Difference]: With dead ends: 9282 [2021-11-07 01:09:12,995 INFO L226 Difference]: Without dead ends: 6986 [2021-11-07 01:09:13,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 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 01:09:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6986 states. [2021-11-07 01:09:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6986 to 2348. [2021-11-07 01:09:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2348 states, 2343 states have (on average 1.8408023900981647) internal successors, (4313), 2347 states have internal predecessors, (4313), 0 states have call successors, (0), 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 01:09:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 4313 transitions. [2021-11-07 01:09:13,215 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 4313 transitions. Word has length 67 [2021-11-07 01:09:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:13,215 INFO L470 AbstractCegarLoop]: Abstraction has 2348 states and 4313 transitions. [2021-11-07 01:09:13,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) 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 01:09:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 4313 transitions. [2021-11-07 01:09:13,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:09:13,219 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:13,219 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:13,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:13,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:13,437 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 01:09:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:13,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1224013609, now seen corresponding path program 1 times [2021-11-07 01:09:13,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:13,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321689594] [2021-11-07 01:09:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:13,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:13,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:13,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:13,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:09:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:13,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:09:13,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:14,100 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 01:09:14,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:14,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:14,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321689594] [2021-11-07 01:09:14,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321689594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:14,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:14,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:14,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559588337] [2021-11-07 01:09:14,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:14,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:14,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:14,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:14,307 INFO L87 Difference]: Start difference. First operand 2348 states and 4313 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:15,795 INFO L93 Difference]: Finished difference Result 6546 states and 12095 transitions. [2021-11-07 01:09:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:09:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:09:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:15,806 INFO L225 Difference]: With dead ends: 6546 [2021-11-07 01:09:15,806 INFO L226 Difference]: Without dead ends: 4233 [2021-11-07 01:09:15,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 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 01:09:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2021-11-07 01:09:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 3224. [2021-11-07 01:09:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3219 states have (on average 1.8275862068965518) internal successors, (5883), 3223 states have internal predecessors, (5883), 0 states have call successors, (0), 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 01:09:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 5883 transitions. [2021-11-07 01:09:15,973 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 5883 transitions. Word has length 68 [2021-11-07 01:09:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:15,973 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 5883 transitions. [2021-11-07 01:09:15,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 5883 transitions. [2021-11-07 01:09:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:09:15,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:15,976 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:15,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:16,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:16,190 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 01:09:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash -657199347, now seen corresponding path program 1 times [2021-11-07 01:09:16,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:16,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196217096] [2021-11-07 01:09:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:16,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:16,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:16,193 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:16,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:09:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:16,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:09:16,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:16,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:17,143 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 01:09:17,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:17,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196217096] [2021-11-07 01:09:17,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196217096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:17,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:17,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:09:17,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025428876] [2021-11-07 01:09:17,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:09:17,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:09:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:09:17,146 INFO L87 Difference]: Start difference. First operand 3224 states and 5883 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:18,513 INFO L93 Difference]: Finished difference Result 23219 states and 42658 transitions. [2021-11-07 01:09:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:09:18,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:09:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:18,566 INFO L225 Difference]: With dead ends: 23219 [2021-11-07 01:09:18,566 INFO L226 Difference]: Without dead ends: 20039 [2021-11-07 01:09:18,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 135 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 01:09:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20039 states. [2021-11-07 01:09:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20039 to 5914. [2021-11-07 01:09:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5914 states, 5909 states have (on average 1.8392282958199357) internal successors, (10868), 5913 states have internal predecessors, (10868), 0 states have call successors, (0), 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 01:09:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5914 states to 5914 states and 10868 transitions. [2021-11-07 01:09:18,993 INFO L78 Accepts]: Start accepts. Automaton has 5914 states and 10868 transitions. Word has length 70 [2021-11-07 01:09:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:18,995 INFO L470 AbstractCegarLoop]: Abstraction has 5914 states and 10868 transitions. [2021-11-07 01:09:18,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 5914 states and 10868 transitions. [2021-11-07 01:09:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:09:18,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:18,998 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:19,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:19,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:19,220 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 01:09:19,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:19,221 INFO L85 PathProgramCache]: Analyzing trace with hash 44400527, now seen corresponding path program 1 times [2021-11-07 01:09:19,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:19,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455407760] [2021-11-07 01:09:19,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:19,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:19,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:19,223 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:19,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:09:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:09:19,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:20,096 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 01:09:20,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:20,318 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 01:09:20,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:20,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455407760] [2021-11-07 01:09:20,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455407760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:20,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:20,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:09:20,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854523469] [2021-11-07 01:09:20,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:20,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:20,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:20,320 INFO L87 Difference]: Start difference. First operand 5914 states and 10868 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:21,581 INFO L93 Difference]: Finished difference Result 10719 states and 19613 transitions. [2021-11-07 01:09:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:09:21,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:09:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:21,606 INFO L225 Difference]: With dead ends: 10719 [2021-11-07 01:09:21,607 INFO L226 Difference]: Without dead ends: 8145 [2021-11-07 01:09:21,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:09:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-11-07 01:09:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 5904. [2021-11-07 01:09:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5904 states, 5899 states have (on average 1.838955755212748) internal successors, (10848), 5903 states have internal predecessors, (10848), 0 states have call successors, (0), 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 01:09:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5904 states to 5904 states and 10848 transitions. [2021-11-07 01:09:21,980 INFO L78 Accepts]: Start accepts. Automaton has 5904 states and 10848 transitions. Word has length 70 [2021-11-07 01:09:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:21,980 INFO L470 AbstractCegarLoop]: Abstraction has 5904 states and 10848 transitions. [2021-11-07 01:09:21,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5904 states and 10848 transitions. [2021-11-07 01:09:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:09:21,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:21,984 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:22,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:22,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:22,201 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 01:09:22,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:22,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1802877815, now seen corresponding path program 1 times [2021-11-07 01:09:22,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:22,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851564654] [2021-11-07 01:09:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:22,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:22,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:22,204 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:22,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:09:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:22,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:22,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:23,088 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 01:09:23,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:23,396 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 01:09:23,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:23,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851564654] [2021-11-07 01:09:23,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851564654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:23,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:23,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:09:23,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249913955] [2021-11-07 01:09:23,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:09:23,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:09:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:09:23,399 INFO L87 Difference]: Start difference. First operand 5904 states and 10848 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 01:09:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:24,173 INFO L93 Difference]: Finished difference Result 18080 states and 33291 transitions. [2021-11-07 01:09:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:09:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:09:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:24,214 INFO L225 Difference]: With dead ends: 18080 [2021-11-07 01:09:24,214 INFO L226 Difference]: Without dead ends: 15512 [2021-11-07 01:09:24,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 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 01:09:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15512 states. [2021-11-07 01:09:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15512 to 8211. [2021-11-07 01:09:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8211 states, 8206 states have (on average 1.8325615403363393) internal successors, (15038), 8210 states have internal predecessors, (15038), 0 states have call successors, (0), 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 01:09:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8211 states to 8211 states and 15038 transitions. [2021-11-07 01:09:24,797 INFO L78 Accepts]: Start accepts. Automaton has 8211 states and 15038 transitions. Word has length 72 [2021-11-07 01:09:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:24,798 INFO L470 AbstractCegarLoop]: Abstraction has 8211 states and 15038 transitions. [2021-11-07 01:09:24,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 01:09:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 8211 states and 15038 transitions. [2021-11-07 01:09:24,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:09:24,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:24,801 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 01:09:24,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:25,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:25,017 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 01:09:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:25,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1605424715, now seen corresponding path program 1 times [2021-11-07 01:09:25,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:25,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171487632] [2021-11-07 01:09:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:25,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:25,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:25,020 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:25,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:09:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:25,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:09:25,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:25,925 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 01:09:25,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:26,225 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 01:09:26,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:26,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171487632] [2021-11-07 01:09:26,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171487632] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:26,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:26,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:09:26,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757852601] [2021-11-07 01:09:26,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:26,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:26,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:26,229 INFO L87 Difference]: Start difference. First operand 8211 states and 15038 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:28,777 INFO L93 Difference]: Finished difference Result 36324 states and 66921 transitions. [2021-11-07 01:09:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:09:28,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:09:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:28,821 INFO L225 Difference]: With dead ends: 36324 [2021-11-07 01:09:28,821 INFO L226 Difference]: Without dead ends: 31449 [2021-11-07 01:09:28,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:09:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31449 states. [2021-11-07 01:09:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31449 to 11957. [2021-11-07 01:09:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 11952 states have (on average 1.8407797858099062) internal successors, (22001), 11956 states have internal predecessors, (22001), 0 states have call successors, (0), 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 01:09:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 22001 transitions. [2021-11-07 01:09:29,623 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 22001 transitions. Word has length 74 [2021-11-07 01:09:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:29,624 INFO L470 AbstractCegarLoop]: Abstraction has 11957 states and 22001 transitions. [2021-11-07 01:09:29,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 22001 transitions. [2021-11-07 01:09:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:09:29,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:29,628 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:29,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:29,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:29,843 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 01:09:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:29,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1997109400, now seen corresponding path program 1 times [2021-11-07 01:09:29,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:29,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354859050] [2021-11-07 01:09:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:29,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:29,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:29,846 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:29,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:09:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:09:30,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:30,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:30,949 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 01:09:30,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:30,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354859050] [2021-11-07 01:09:30,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354859050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:30,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:30,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:30,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854174235] [2021-11-07 01:09:30,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:30,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:30,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:30,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:30,952 INFO L87 Difference]: Start difference. First operand 11957 states and 22001 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:09:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:31,534 INFO L93 Difference]: Finished difference Result 20710 states and 37976 transitions. [2021-11-07 01:09:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:31,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:09:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:31,548 INFO L225 Difference]: With dead ends: 20710 [2021-11-07 01:09:31,549 INFO L226 Difference]: Without dead ends: 11972 [2021-11-07 01:09:31,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 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 01:09:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11972 states. [2021-11-07 01:09:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11972 to 11957. [2021-11-07 01:09:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 11952 states have (on average 1.8315763052208835) internal successors, (21891), 11956 states have internal predecessors, (21891), 0 states have call successors, (0), 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 01:09:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 21891 transitions. [2021-11-07 01:09:32,412 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 21891 transitions. Word has length 81 [2021-11-07 01:09:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:32,413 INFO L470 AbstractCegarLoop]: Abstraction has 11957 states and 21891 transitions. [2021-11-07 01:09:32,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:09:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 21891 transitions. [2021-11-07 01:09:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:09:32,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:32,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:32,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:32,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:32,632 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 01:09:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1430803184, now seen corresponding path program 1 times [2021-11-07 01:09:32,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:32,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102953746] [2021-11-07 01:09:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:32,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:32,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:32,634 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:32,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:09:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:33,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:09:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:33,575 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 01:09:33,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:33,854 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 01:09:33,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:33,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102953746] [2021-11-07 01:09:33,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102953746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:33,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:33,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:09:33,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463730376] [2021-11-07 01:09:33,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:33,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:33,858 INFO L87 Difference]: Start difference. First operand 11957 states and 21891 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:36,122 INFO L93 Difference]: Finished difference Result 31526 states and 57562 transitions. [2021-11-07 01:09:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:09:36,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:09:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:36,148 INFO L225 Difference]: With dead ends: 31526 [2021-11-07 01:09:36,148 INFO L226 Difference]: Without dead ends: 23126 [2021-11-07 01:09:36,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:09:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23126 states. [2021-11-07 01:09:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23126 to 10417. [2021-11-07 01:09:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10417 states, 10412 states have (on average 1.820399538993469) internal successors, (18954), 10416 states have internal predecessors, (18954), 0 states have call successors, (0), 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 01:09:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10417 states to 10417 states and 18954 transitions. [2021-11-07 01:09:36,669 INFO L78 Accepts]: Start accepts. Automaton has 10417 states and 18954 transitions. Word has length 82 [2021-11-07 01:09:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:36,670 INFO L470 AbstractCegarLoop]: Abstraction has 10417 states and 18954 transitions. [2021-11-07 01:09:36,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 10417 states and 18954 transitions. [2021-11-07 01:09:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:09:36,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:36,674 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:36,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:36,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:36,888 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 01:09:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:36,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2017609198, now seen corresponding path program 1 times [2021-11-07 01:09:36,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:36,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658742405] [2021-11-07 01:09:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:36,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:36,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:36,891 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:36,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:09:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:37,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:37,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:37,842 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 01:09:37,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:38,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:38,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658742405] [2021-11-07 01:09:38,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658742405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:38,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:38,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:09:38,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564169567] [2021-11-07 01:09:38,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:38,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:38,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:38,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:38,077 INFO L87 Difference]: Start difference. First operand 10417 states and 18954 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 01:09:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:39,401 INFO L93 Difference]: Finished difference Result 39005 states and 71048 transitions. [2021-11-07 01:09:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:39,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:09:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:39,441 INFO L225 Difference]: With dead ends: 39005 [2021-11-07 01:09:39,441 INFO L226 Difference]: Without dead ends: 28794 [2021-11-07 01:09:39,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 160 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 01:09:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28794 states. [2021-11-07 01:09:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28794 to 28764. [2021-11-07 01:09:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28764 states, 28759 states have (on average 1.815501234396189) internal successors, (52212), 28763 states have internal predecessors, (52212), 0 states have call successors, (0), 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 01:09:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28764 states to 28764 states and 52212 transitions. [2021-11-07 01:09:41,171 INFO L78 Accepts]: Start accepts. Automaton has 28764 states and 52212 transitions. Word has length 82 [2021-11-07 01:09:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:41,171 INFO L470 AbstractCegarLoop]: Abstraction has 28764 states and 52212 transitions. [2021-11-07 01:09:41,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 01:09:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 28764 states and 52212 transitions. [2021-11-07 01:09:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:09:41,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:41,175 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:41,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:41,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:41,375 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 01:09:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:41,376 INFO L85 PathProgramCache]: Analyzing trace with hash 352703300, now seen corresponding path program 1 times [2021-11-07 01:09:41,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:41,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586476481] [2021-11-07 01:09:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:41,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:41,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:41,377 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:41,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:09:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:42,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:42,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:42,350 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 01:09:42,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:42,592 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 01:09:42,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:42,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586476481] [2021-11-07 01:09:42,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586476481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:42,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:42,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:09:42,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516482825] [2021-11-07 01:09:42,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:42,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:42,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:42,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:42,595 INFO L87 Difference]: Start difference. First operand 28764 states and 52212 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 01:09:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:46,515 INFO L93 Difference]: Finished difference Result 110716 states and 200853 transitions. [2021-11-07 01:09:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:46,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:09:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:46,657 INFO L225 Difference]: With dead ends: 110716 [2021-11-07 01:09:46,658 INFO L226 Difference]: Without dead ends: 82159 [2021-11-07 01:09:46,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 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 01:09:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82159 states. [2021-11-07 01:09:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82159 to 82129. [2021-11-07 01:09:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82129 states, 82124 states have (on average 1.8098241683308167) internal successors, (148630), 82128 states have internal predecessors, (148630), 0 states have call successors, (0), 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 01:09:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82129 states to 82129 states and 148630 transitions. [2021-11-07 01:09:51,633 INFO L78 Accepts]: Start accepts. Automaton has 82129 states and 148630 transitions. Word has length 83 [2021-11-07 01:09:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:51,634 INFO L470 AbstractCegarLoop]: Abstraction has 82129 states and 148630 transitions. [2021-11-07 01:09:51,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 01:09:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 82129 states and 148630 transitions. [2021-11-07 01:09:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:09:51,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:51,637 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:51,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:51,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:51,838 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 01:09:51,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:51,838 INFO L85 PathProgramCache]: Analyzing trace with hash 370608983, now seen corresponding path program 1 times [2021-11-07 01:09:51,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:51,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886967886] [2021-11-07 01:09:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:51,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:51,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:51,840 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:51,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e115309f-b9f4-491a-ab66-4cc04de6113a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:09:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:52,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:52,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:52,902 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 01:09:52,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:53,172 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 01:09:53,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:53,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886967886] [2021-11-07 01:09:53,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886967886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:53,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:53,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:09:53,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383131643] [2021-11-07 01:09:53,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:53,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:53,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:53,175 INFO L87 Difference]: Start difference. First operand 82129 states and 148630 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 01:10:05,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:05,470 INFO L93 Difference]: Finished difference Result 320845 states and 580112 transitions. [2021-11-07 01:10:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:05,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:10:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:06,093 INFO L225 Difference]: With dead ends: 320845 [2021-11-07 01:10:06,093 INFO L226 Difference]: Without dead ends: 238924 [2021-11-07 01:10:06,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 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 01:10:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238924 states.