./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.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_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/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_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/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_0605f5a4-5d13-4830-93e1-805511941f7f/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 e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:31:51,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:31:51,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:31:51,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:31:51,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:31:51,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:31:51,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:31:51,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:31:51,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:31:51,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:31:51,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:31:51,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:31:51,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:31:51,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:31:51,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:31:51,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:31:51,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:31:51,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:31:51,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:31:51,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:31:51,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:31:51,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:31:51,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:31:51,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:31:51,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:31:51,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:31:51,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:31:51,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:31:51,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:31:51,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:31:51,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:31:51,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:31:51,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:31:51,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:31:51,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:31:51,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:31:51,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:31:51,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:31:51,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:31:51,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:31:51,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:31:51,860 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:31:51,895 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:31:51,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:31:51,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:31:51,898 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:31:51,898 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:31:51,898 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:31:51,898 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:31:51,899 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:31:51,899 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:31:51,899 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:31:51,899 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:31:51,899 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:31:51,900 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:31:51,900 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:31:51,900 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:31:51,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:31:51,901 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:31:51,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:31:51,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:31:51,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:31:51,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:31:51,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:31:51,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:31:51,902 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:31:51,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:31:51,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:31:51,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:31:51,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:31:51,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:31:51,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:31:51,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:51,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:31:51,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:31:51,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:31:51,905 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:31:51,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:31:51,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:31:51,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:31:51,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:31:51,911 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_0605f5a4-5d13-4830-93e1-805511941f7f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 [2021-11-07 01:31:52,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:31:52,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:31:52,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:31:52,212 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:31:52,213 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:31:52,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2021-11-07 01:31:52,290 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/data/1ccd59091/bb49da1c46be4f718944b8bf997b9a89/FLAG801ba44d6 [2021-11-07 01:31:52,924 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:31:52,924 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2021-11-07 01:31:52,946 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/data/1ccd59091/bb49da1c46be4f718944b8bf997b9a89/FLAG801ba44d6 [2021-11-07 01:31:53,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/data/1ccd59091/bb49da1c46be4f718944b8bf997b9a89 [2021-11-07 01:31:53,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:31:53,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:31:53,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:53,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:31:53,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:31:53,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:53" (1/1) ... [2021-11-07 01:31:53,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d3457d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:53, skipping insertion in model container [2021-11-07 01:31:53,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:53" (1/1) ... [2021-11-07 01:31:53,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:31:53,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:31:53,666 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_0605f5a4-5d13-4830-93e1-805511941f7f/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2021-11-07 01:31:53,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:53,840 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 01:31:53,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c6e93ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:53, skipping insertion in model container [2021-11-07 01:31:53,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:53,841 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:31:53,843 INFO L168 Benchmark]: Toolchain (without parser) took 697.92 ms. Allocated memory is still 119.5 MB. Free memory was 80.9 MB in the beginning and 82.4 MB in the end (delta: -1.4 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:53,844 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 119.5 MB. Free memory is still 100.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:31:53,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.46 ms. Allocated memory is still 119.5 MB. Free memory was 80.7 MB in the beginning and 82.4 MB in the end (delta: -1.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:53,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 119.5 MB. Free memory is still 100.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 695.46 ms. Allocated memory is still 119.5 MB. Free memory was 80.7 MB in the beginning and 82.4 MB in the end (delta: -1.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1862]: 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_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/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_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/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_0605f5a4-5d13-4830-93e1-805511941f7f/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 e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:31:55,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:31:55,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:31:56,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:31:56,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:31:56,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:31:56,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:31:56,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:31:56,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:31:56,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:31:56,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:31:56,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:31:56,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:31:56,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:31:56,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:31:56,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:31:56,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:31:56,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:31:56,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:31:56,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:31:56,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:31:56,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:31:56,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:31:56,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:31:56,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:31:56,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:31:56,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:31:56,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:31:56,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:31:56,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:31:56,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:31:56,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:31:56,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:31:56,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:31:56,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:31:56,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:31:56,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:31:56,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:31:56,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:31:56,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:31:56,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:31:56,130 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:31:56,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:31:56,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:31:56,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:31:56,175 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:31:56,175 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:31:56,176 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:31:56,176 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:31:56,176 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:31:56,176 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:31:56,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:31:56,179 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:31:56,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:31:56,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:31:56,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:31:56,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:31:56,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:31:56,180 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:31:56,180 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:31:56,180 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:31:56,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:31:56,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:31:56,181 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:31:56,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:31:56,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:31:56,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:31:56,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:31:56,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:56,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:31:56,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:31:56,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:31:56,183 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:31:56,183 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:56,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:31:56,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:31:56,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:31:56,184 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_0605f5a4-5d13-4830-93e1-805511941f7f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 [2021-11-07 01:31:56,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:31:56,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:31:56,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:31:56,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:31:56,585 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:31:56,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2021-11-07 01:31:56,654 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/data/01b7553c4/fe6bbae249ff4eb0be4e7bcff38af916/FLAGdc3586942 [2021-11-07 01:31:57,341 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:31:57,342 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2021-11-07 01:31:57,375 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/data/01b7553c4/fe6bbae249ff4eb0be4e7bcff38af916/FLAGdc3586942 [2021-11-07 01:31:57,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/data/01b7553c4/fe6bbae249ff4eb0be4e7bcff38af916 [2021-11-07 01:31:57,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:31:57,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:31:57,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:57,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:31:57,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:31:57,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:57" (1/1) ... [2021-11-07 01:31:57,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff9eae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:57, skipping insertion in model container [2021-11-07 01:31:57,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:57" (1/1) ... [2021-11-07 01:31:57,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:31:57,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:31:58,143 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_0605f5a4-5d13-4830-93e1-805511941f7f/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2021-11-07 01:31:58,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:58,309 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:31:58,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:31:58,452 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_0605f5a4-5d13-4830-93e1-805511941f7f/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2021-11-07 01:31:58,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:58,522 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:31:58,581 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_0605f5a4-5d13-4830-93e1-805511941f7f/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2021-11-07 01:31:58,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:58,659 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:31:58,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58 WrapperNode [2021-11-07 01:31:58,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:58,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:31:58,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:31:58,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:31:58,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (1/1) ... [2021-11-07 01:31:58,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (1/1) ... [2021-11-07 01:31:59,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:31:59,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:31:59,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:31:59,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:31:59,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (1/1) ... [2021-11-07 01:31:59,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (1/1) ... [2021-11-07 01:31:59,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (1/1) ... [2021-11-07 01:31:59,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (1/1) ... [2021-11-07 01:31:59,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (1/1) ... [2021-11-07 01:31:59,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (1/1) ... [2021-11-07 01:31:59,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (1/1) ... [2021-11-07 01:31:59,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:31:59,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:31:59,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:31:59,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:31:59,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (1/1) ... [2021-11-07 01:31:59,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:59,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:31:59,763 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:31:59,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:31:59,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:31:59,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:31:59,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:31:59,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:32:12,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:32:12,795 INFO L299 CfgBuilder]: Removed 1149 assume(true) statements. [2021-11-07 01:32:12,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:12 BoogieIcfgContainer [2021-11-07 01:32:12,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:32:12,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:32:12,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:32:12,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:32:12,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:31:57" (1/3) ... [2021-11-07 01:32:12,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496a4fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:12, skipping insertion in model container [2021-11-07 01:32:12,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:58" (2/3) ... [2021-11-07 01:32:12,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496a4fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:12, skipping insertion in model container [2021-11-07 01:32:12,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:12" (3/3) ... [2021-11-07 01:32:12,812 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product20.cil.c [2021-11-07 01:32:12,817 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:32:12,818 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:32:12,887 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:32:12,893 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 01:32:12,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:32:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 4828 states, 4822 states have (on average 1.8907092492741602) internal successors, (9117), 4827 states have internal predecessors, (9117), 0 states have call successors, (0), 0 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 01:32:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:32:13,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:13,003 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] [2021-11-07 01:32:13,003 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 01:32:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:13,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1738101589, now seen corresponding path program 1 times [2021-11-07 01:32:13,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:13,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826003002] [2021-11-07 01:32:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:13,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:13,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:13,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:13,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:32:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:32:13,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:13,505 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 01:32:13,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:13,565 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 01:32:13,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:13,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826003002] [2021-11-07 01:32:13,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826003002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:13,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:13,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:32:13,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206417184] [2021-11-07 01:32:13,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:32:13,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:13,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:32:13,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:32:13,603 INFO L87 Difference]: Start difference. First operand has 4828 states, 4822 states have (on average 1.8907092492741602) internal successors, (9117), 4827 states have internal predecessors, (9117), 0 states have call successors, (0), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 01:32:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:13,783 INFO L93 Difference]: Finished difference Result 4847 states and 9140 transitions. [2021-11-07 01:32:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:32:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-07 01:32:13,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:13,845 INFO L225 Difference]: With dead ends: 4847 [2021-11-07 01:32:13,845 INFO L226 Difference]: Without dead ends: 4824 [2021-11-07 01:32:13,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 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 01:32:13,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-11-07 01:32:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4824. [2021-11-07 01:32:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4824 states, 4819 states have (on average 1.889396140278066) internal successors, (9105), 4823 states have internal predecessors, (9105), 0 states have call successors, (0), 0 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 01:32:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4824 states to 4824 states and 9105 transitions. [2021-11-07 01:32:14,108 INFO L78 Accepts]: Start accepts. Automaton has 4824 states and 9105 transitions. Word has length 27 [2021-11-07 01:32:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:14,108 INFO L470 AbstractCegarLoop]: Abstraction has 4824 states and 9105 transitions. [2021-11-07 01:32:14,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 01:32:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4824 states and 9105 transitions. [2021-11-07 01:32:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:32:14,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:14,112 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] [2021-11-07 01:32:14,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:14,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:14,336 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 01:32:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1984600369, now seen corresponding path program 1 times [2021-11-07 01:32:14,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:14,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387633017] [2021-11-07 01:32:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:14,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:14,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:14,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:14,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:32:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:14,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:32:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:14,782 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 01:32:14,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:14,882 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 01:32:14,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:14,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387633017] [2021-11-07 01:32:14,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387633017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:14,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:14,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:32:14,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916709506] [2021-11-07 01:32:14,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:14,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:14,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:14,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:14,887 INFO L87 Difference]: Start difference. First operand 4824 states and 9105 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 01:32:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:15,220 INFO L93 Difference]: Finished difference Result 9635 states and 18191 transitions. [2021-11-07 01:32:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:15,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 29 [2021-11-07 01:32:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:15,253 INFO L225 Difference]: With dead ends: 9635 [2021-11-07 01:32:15,254 INFO L226 Difference]: Without dead ends: 4824 [2021-11-07 01:32:15,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 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 01:32:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-11-07 01:32:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4824. [2021-11-07 01:32:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4824 states, 4819 states have (on average 1.8881510686864496) internal successors, (9099), 4823 states have internal predecessors, (9099), 0 states have call successors, (0), 0 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 01:32:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4824 states to 4824 states and 9099 transitions. [2021-11-07 01:32:15,432 INFO L78 Accepts]: Start accepts. Automaton has 4824 states and 9099 transitions. Word has length 29 [2021-11-07 01:32:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:15,432 INFO L470 AbstractCegarLoop]: Abstraction has 4824 states and 9099 transitions. [2021-11-07 01:32:15,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 01:32:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4824 states and 9099 transitions. [2021-11-07 01:32:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:32:15,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:15,435 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] [2021-11-07 01:32:15,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:15,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:15,649 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 01:32:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:15,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2103046779, now seen corresponding path program 1 times [2021-11-07 01:32:15,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:15,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874257607] [2021-11-07 01:32:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:15,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:15,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:15,652 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:15,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:32:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:15,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:32:15,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:16,075 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 01:32:16,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:16,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:16,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874257607] [2021-11-07 01:32:16,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874257607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:16,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:16,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:32:16,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432978996] [2021-11-07 01:32:16,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:16,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:16,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:16,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:16,184 INFO L87 Difference]: Start difference. First operand 4824 states and 9099 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 01:32:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:16,513 INFO L93 Difference]: Finished difference Result 9599 states and 18114 transitions. [2021-11-07 01:32:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 01:32:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:16,545 INFO L225 Difference]: With dead ends: 9599 [2021-11-07 01:32:16,545 INFO L226 Difference]: Without dead ends: 4797 [2021-11-07 01:32:16,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 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 01:32:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-11-07 01:32:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 4797. [2021-11-07 01:32:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4797 states, 4792 states have (on average 1.8871035058430718) internal successors, (9043), 4796 states have internal predecessors, (9043), 0 states have call successors, (0), 0 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 01:32:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4797 states to 4797 states and 9043 transitions. [2021-11-07 01:32:16,860 INFO L78 Accepts]: Start accepts. Automaton has 4797 states and 9043 transitions. Word has length 34 [2021-11-07 01:32:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:16,861 INFO L470 AbstractCegarLoop]: Abstraction has 4797 states and 9043 transitions. [2021-11-07 01:32:16,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 01:32:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4797 states and 9043 transitions. [2021-11-07 01:32:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:32:16,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:16,864 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] [2021-11-07 01:32:16,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:17,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:17,078 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 01:32:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1062223965, now seen corresponding path program 1 times [2021-11-07 01:32:17,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:17,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969485564] [2021-11-07 01:32:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:17,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:17,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:17,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:17,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:32:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:32:17,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:17,541 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 01:32:17,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:17,651 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 01:32:17,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:17,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969485564] [2021-11-07 01:32:17,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969485564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:17,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:17,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:32:17,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814232231] [2021-11-07 01:32:17,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:17,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:17,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:17,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:17,654 INFO L87 Difference]: Start difference. First operand 4797 states and 9043 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 01:32:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:17,897 INFO L93 Difference]: Finished difference Result 9572 states and 18058 transitions. [2021-11-07 01:32:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:32:17,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 35 [2021-11-07 01:32:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:17,929 INFO L225 Difference]: With dead ends: 9572 [2021-11-07 01:32:17,930 INFO L226 Difference]: Without dead ends: 4797 [2021-11-07 01:32:17,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 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 01:32:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-11-07 01:32:18,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 4797. [2021-11-07 01:32:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4797 states, 4792 states have (on average 1.8858514190317195) internal successors, (9037), 4796 states have internal predecessors, (9037), 0 states have call successors, (0), 0 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 01:32:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4797 states to 4797 states and 9037 transitions. [2021-11-07 01:32:18,127 INFO L78 Accepts]: Start accepts. Automaton has 4797 states and 9037 transitions. Word has length 35 [2021-11-07 01:32:18,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:18,127 INFO L470 AbstractCegarLoop]: Abstraction has 4797 states and 9037 transitions. [2021-11-07 01:32:18,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 01:32:18,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4797 states and 9037 transitions. [2021-11-07 01:32:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:32:18,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:18,129 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] [2021-11-07 01:32:18,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:18,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:18,343 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 01:32:18,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:18,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1247409038, now seen corresponding path program 1 times [2021-11-07 01:32:18,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:18,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625895424] [2021-11-07 01:32:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:18,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:18,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:18,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:18,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:32:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:32:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:18,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:19,040 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 01:32:19,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:19,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625895424] [2021-11-07 01:32:19,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625895424] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:19,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:19,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:32:19,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052495027] [2021-11-07 01:32:19,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:32:19,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:32:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:32:19,043 INFO L87 Difference]: Start difference. First operand 4797 states and 9037 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:19,488 INFO L93 Difference]: Finished difference Result 9566 states and 18041 transitions. [2021-11-07 01:32:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:32:19,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 01:32:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:19,517 INFO L225 Difference]: With dead ends: 9566 [2021-11-07 01:32:19,517 INFO L226 Difference]: Without dead ends: 4794 [2021-11-07 01:32:19,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 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 01:32:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4794 states. [2021-11-07 01:32:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4794 to 4794. [2021-11-07 01:32:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4794 states, 4789 states have (on average 1.8853622885779913) internal successors, (9029), 4793 states have internal predecessors, (9029), 0 states have call successors, (0), 0 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 01:32:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4794 states to 4794 states and 9029 transitions. [2021-11-07 01:32:19,751 INFO L78 Accepts]: Start accepts. Automaton has 4794 states and 9029 transitions. Word has length 40 [2021-11-07 01:32:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:19,752 INFO L470 AbstractCegarLoop]: Abstraction has 4794 states and 9029 transitions. [2021-11-07 01:32:19,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4794 states and 9029 transitions. [2021-11-07 01:32:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:32:19,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:19,754 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] [2021-11-07 01:32:19,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:32:19,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:19,970 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 01:32:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1433636002, now seen corresponding path program 1 times [2021-11-07 01:32:19,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:19,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257756758] [2021-11-07 01:32:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:19,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:19,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:19,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:19,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:32:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:32:20,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:20,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:20,864 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 01:32:20,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:20,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257756758] [2021-11-07 01:32:20,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257756758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:20,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:20,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:32:20,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17098176] [2021-11-07 01:32:20,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:20,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:20,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:20,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:20,867 INFO L87 Difference]: Start difference. First operand 4794 states and 9029 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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 01:32:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:21,481 INFO L93 Difference]: Finished difference Result 13340 states and 25174 transitions. [2021-11-07 01:32:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:21,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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 41 [2021-11-07 01:32:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:21,514 INFO L225 Difference]: With dead ends: 13340 [2021-11-07 01:32:21,514 INFO L226 Difference]: Without dead ends: 10901 [2021-11-07 01:32:21,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 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 01:32:21,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10901 states. [2021-11-07 01:32:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10901 to 6400. [2021-11-07 01:32:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6400 states, 6395 states have (on average 1.886161063330727) internal successors, (12062), 6399 states have internal predecessors, (12062), 0 states have call successors, (0), 0 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 01:32:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6400 states to 6400 states and 12062 transitions. [2021-11-07 01:32:21,884 INFO L78 Accepts]: Start accepts. Automaton has 6400 states and 12062 transitions. Word has length 41 [2021-11-07 01:32:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:21,885 INFO L470 AbstractCegarLoop]: Abstraction has 6400 states and 12062 transitions. [2021-11-07 01:32:21,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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 01:32:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6400 states and 12062 transitions. [2021-11-07 01:32:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:32:21,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:21,890 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:21,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:22,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:22,107 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 01:32:22,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:22,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1931969883, now seen corresponding path program 1 times [2021-11-07 01:32:22,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:22,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506957810] [2021-11-07 01:32:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:22,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:22,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:22,110 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:22,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:32:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:22,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:32:22,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:22,782 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 01:32:22,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:23,000 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 01:32:23,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:23,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506957810] [2021-11-07 01:32:23,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506957810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:23,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:23,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:32:23,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497059492] [2021-11-07 01:32:23,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:32:23,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:23,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:32:23,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:32:23,003 INFO L87 Difference]: Start difference. First operand 6400 states and 12062 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 01:32:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:23,769 INFO L93 Difference]: Finished difference Result 12214 states and 22806 transitions. [2021-11-07 01:32:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:32:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:32:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:23,788 INFO L225 Difference]: With dead ends: 12214 [2021-11-07 01:32:23,788 INFO L226 Difference]: Without dead ends: 7005 [2021-11-07 01:32:23,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:32:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2021-11-07 01:32:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 4743. [2021-11-07 01:32:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4738 states have (on average 1.8784297171802449) internal successors, (8900), 4742 states have internal predecessors, (8900), 0 states have call successors, (0), 0 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 01:32:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 8900 transitions. [2021-11-07 01:32:24,074 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 8900 transitions. Word has length 60 [2021-11-07 01:32:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:24,075 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 8900 transitions. [2021-11-07 01:32:24,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 01:32:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 8900 transitions. [2021-11-07 01:32:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:32:24,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:24,078 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:24,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:24,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:24,278 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 01:32:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:24,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1151522959, now seen corresponding path program 1 times [2021-11-07 01:32:24,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:24,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113167452] [2021-11-07 01:32:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:24,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:24,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:24,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:24,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:32:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:24,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:32:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:24,866 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 01:32:24,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:25,072 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 01:32:25,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:25,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113167452] [2021-11-07 01:32:25,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113167452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:25,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:25,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:32:25,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819687320] [2021-11-07 01:32:25,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:25,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:25,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:25,075 INFO L87 Difference]: Start difference. First operand 4743 states and 8900 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:27,163 INFO L93 Difference]: Finished difference Result 17601 states and 33092 transitions. [2021-11-07 01:32:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:32:27,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:32:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:27,200 INFO L225 Difference]: With dead ends: 17601 [2021-11-07 01:32:27,200 INFO L226 Difference]: Without dead ends: 12892 [2021-11-07 01:32:27,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 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 01:32:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12892 states. [2021-11-07 01:32:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12892 to 4743. [2021-11-07 01:32:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4738 states have (on average 1.8425495989869143) internal successors, (8730), 4742 states have internal predecessors, (8730), 0 states have call successors, (0), 0 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 01:32:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 8730 transitions. [2021-11-07 01:32:27,571 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 8730 transitions. Word has length 61 [2021-11-07 01:32:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:27,572 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 8730 transitions. [2021-11-07 01:32:27,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 8730 transitions. [2021-11-07 01:32:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:32:27,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:27,575 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:27,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:27,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:27,801 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 01:32:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash -307811235, now seen corresponding path program 1 times [2021-11-07 01:32:27,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:27,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587664588] [2021-11-07 01:32:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:27,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:27,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:27,803 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:27,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:32:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:32:28,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:28,472 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 01:32:28,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:28,699 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 01:32:28,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:28,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587664588] [2021-11-07 01:32:28,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587664588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:28,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:28,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:32:28,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240352905] [2021-11-07 01:32:28,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:28,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:28,702 INFO L87 Difference]: Start difference. First operand 4743 states and 8730 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 01:32:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:30,184 INFO L93 Difference]: Finished difference Result 13450 states and 24949 transitions. [2021-11-07 01:32:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:32:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:32:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:30,208 INFO L225 Difference]: With dead ends: 13450 [2021-11-07 01:32:30,208 INFO L226 Difference]: Without dead ends: 8759 [2021-11-07 01:32:30,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 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 01:32:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8759 states. [2021-11-07 01:32:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8759 to 4675. [2021-11-07 01:32:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4670 states have (on average 1.8428265524625267) internal successors, (8606), 4674 states have internal predecessors, (8606), 0 states have call successors, (0), 0 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 01:32:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 8606 transitions. [2021-11-07 01:32:30,530 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 8606 transitions. Word has length 69 [2021-11-07 01:32:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:30,531 INFO L470 AbstractCegarLoop]: Abstraction has 4675 states and 8606 transitions. [2021-11-07 01:32:30,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 01:32:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 8606 transitions. [2021-11-07 01:32:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:32:30,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:30,534 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:30,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:30,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:30,750 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 01:32:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -148241411, now seen corresponding path program 1 times [2021-11-07 01:32:30,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:30,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030603962] [2021-11-07 01:32:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:30,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:30,752 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:30,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:32:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:31,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:32:31,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:31,414 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 01:32:31,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:31,635 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 01:32:31,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:31,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030603962] [2021-11-07 01:32:31,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030603962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:31,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:31,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:32:31,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179689382] [2021-11-07 01:32:31,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:32:31,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:31,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:32:31,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:32:31,638 INFO L87 Difference]: Start difference. First operand 4675 states and 8606 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 01:32:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:33,802 INFO L93 Difference]: Finished difference Result 18562 states and 34334 transitions. [2021-11-07 01:32:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:32:33,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:32:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:33,838 INFO L225 Difference]: With dead ends: 18562 [2021-11-07 01:32:33,838 INFO L226 Difference]: Without dead ends: 13938 [2021-11-07 01:32:33,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 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 01:32:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13938 states. [2021-11-07 01:32:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13938 to 4683. [2021-11-07 01:32:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4683 states, 4678 states have (on average 1.84138520735357) internal successors, (8614), 4682 states have internal predecessors, (8614), 0 states have call successors, (0), 0 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 01:32:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4683 states to 4683 states and 8614 transitions. [2021-11-07 01:32:34,163 INFO L78 Accepts]: Start accepts. Automaton has 4683 states and 8614 transitions. Word has length 71 [2021-11-07 01:32:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:34,164 INFO L470 AbstractCegarLoop]: Abstraction has 4683 states and 8614 transitions. [2021-11-07 01:32:34,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 01:32:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4683 states and 8614 transitions. [2021-11-07 01:32:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:32:34,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:34,167 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 01:32:34,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:34,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:34,381 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 01:32:34,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:34,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1245416556, now seen corresponding path program 1 times [2021-11-07 01:32:34,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:34,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415026675] [2021-11-07 01:32:34,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:34,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:34,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:34,383 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:34,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:32:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:34,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:32:34,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:35,089 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 01:32:35,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:35,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:35,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415026675] [2021-11-07 01:32:35,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415026675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:35,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:35,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:32:35,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411897873] [2021-11-07 01:32:35,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:35,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:35,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:35,278 INFO L87 Difference]: Start difference. First operand 4683 states and 8614 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 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 01:32:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:37,169 INFO L93 Difference]: Finished difference Result 13371 states and 24698 transitions. [2021-11-07 01:32:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:32:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 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 01:32:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:37,184 INFO L225 Difference]: With dead ends: 13371 [2021-11-07 01:32:37,184 INFO L226 Difference]: Without dead ends: 8726 [2021-11-07 01:32:37,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 140 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 01:32:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2021-11-07 01:32:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 5998. [2021-11-07 01:32:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5998 states, 5993 states have (on average 1.82646420824295) internal successors, (10946), 5997 states have internal predecessors, (10946), 0 states have call successors, (0), 0 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 01:32:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5998 states to 5998 states and 10946 transitions. [2021-11-07 01:32:37,545 INFO L78 Accepts]: Start accepts. Automaton has 5998 states and 10946 transitions. Word has length 72 [2021-11-07 01:32:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:37,546 INFO L470 AbstractCegarLoop]: Abstraction has 5998 states and 10946 transitions. [2021-11-07 01:32:37,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 3 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 01:32:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 5998 states and 10946 transitions. [2021-11-07 01:32:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:32:37,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:37,548 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 01:32:37,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:37,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:37,763 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 01:32:37,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:37,764 INFO L85 PathProgramCache]: Analyzing trace with hash -418276900, now seen corresponding path program 1 times [2021-11-07 01:32:37,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:37,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15384799] [2021-11-07 01:32:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:37,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:37,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:37,766 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:37,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:32:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:38,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:32:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:38,520 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 01:32:38,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:38,706 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 01:32:38,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:38,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15384799] [2021-11-07 01:32:38,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15384799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:38,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:38,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:32:38,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714096218] [2021-11-07 01:32:38,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:32:38,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:38,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:32:38,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:32:38,708 INFO L87 Difference]: Start difference. First operand 5998 states and 10946 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:40,702 INFO L93 Difference]: Finished difference Result 45211 states and 82828 transitions. [2021-11-07 01:32:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:32:40,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:32:40,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:40,749 INFO L225 Difference]: With dead ends: 45211 [2021-11-07 01:32:40,750 INFO L226 Difference]: Without dead ends: 39260 [2021-11-07 01:32:40,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 143 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 01:32:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39260 states. [2021-11-07 01:32:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39260 to 11063. [2021-11-07 01:32:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11063 states, 11058 states have (on average 1.8318864170736118) internal successors, (20257), 11062 states have internal predecessors, (20257), 0 states have call successors, (0), 0 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 01:32:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 20257 transitions. [2021-11-07 01:32:41,570 INFO L78 Accepts]: Start accepts. Automaton has 11063 states and 20257 transitions. Word has length 74 [2021-11-07 01:32:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:41,570 INFO L470 AbstractCegarLoop]: Abstraction has 11063 states and 20257 transitions. [2021-11-07 01:32:41,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 11063 states and 20257 transitions. [2021-11-07 01:32:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:32:41,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:41,574 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 01:32:41,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:32:41,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:41,788 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 01:32:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:41,789 INFO L85 PathProgramCache]: Analyzing trace with hash -143517286, now seen corresponding path program 1 times [2021-11-07 01:32:41,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:41,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981521957] [2021-11-07 01:32:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:41,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:41,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:41,792 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:41,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:32:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:42,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:32:42,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:42,652 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 01:32:42,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:42,853 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 01:32:42,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:42,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981521957] [2021-11-07 01:32:42,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981521957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:42,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:42,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:32:42,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533634760] [2021-11-07 01:32:42,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:42,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:42,856 INFO L87 Difference]: Start difference. First operand 11063 states and 20257 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:44,391 INFO L93 Difference]: Finished difference Result 23340 states and 42767 transitions. [2021-11-07 01:32:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:32:44,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:32:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:44,410 INFO L225 Difference]: With dead ends: 23340 [2021-11-07 01:32:44,411 INFO L226 Difference]: Without dead ends: 16806 [2021-11-07 01:32:44,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:32:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16806 states. [2021-11-07 01:32:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16806 to 11047. [2021-11-07 01:32:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11047 states, 11042 states have (on average 1.8316428183300126) internal successors, (20225), 11046 states have internal predecessors, (20225), 0 states have call successors, (0), 0 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 01:32:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11047 states to 11047 states and 20225 transitions. [2021-11-07 01:32:44,977 INFO L78 Accepts]: Start accepts. Automaton has 11047 states and 20225 transitions. Word has length 74 [2021-11-07 01:32:44,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:44,977 INFO L470 AbstractCegarLoop]: Abstraction has 11047 states and 20225 transitions. [2021-11-07 01:32:44,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 11047 states and 20225 transitions. [2021-11-07 01:32:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:32:44,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:44,980 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:44,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:45,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:45,190 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 01:32:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1982525088, now seen corresponding path program 1 times [2021-11-07 01:32:45,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:45,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785228018] [2021-11-07 01:32:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:45,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:45,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:45,192 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:45,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:32:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:45,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:32:45,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:46,071 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 01:32:46,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:46,287 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 01:32:46,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:46,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785228018] [2021-11-07 01:32:46,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785228018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:46,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:46,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:32:46,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045372625] [2021-11-07 01:32:46,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:32:46,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:32:46,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:32:46,289 INFO L87 Difference]: Start difference. First operand 11047 states and 20225 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:48,151 INFO L93 Difference]: Finished difference Result 44003 states and 81033 transitions. [2021-11-07 01:32:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:32:48,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:32:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:48,200 INFO L225 Difference]: With dead ends: 44003 [2021-11-07 01:32:48,200 INFO L226 Difference]: Without dead ends: 37481 [2021-11-07 01:32:48,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 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 01:32:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37481 states. [2021-11-07 01:32:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37481 to 17020. [2021-11-07 01:32:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17015 states have (on average 1.8304437261240083) internal successors, (31145), 17019 states have internal predecessors, (31145), 0 states have call successors, (0), 0 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 01:32:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 31145 transitions. [2021-11-07 01:32:49,133 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 31145 transitions. Word has length 76 [2021-11-07 01:32:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:49,133 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 31145 transitions. [2021-11-07 01:32:49,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 31145 transitions. [2021-11-07 01:32:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:32:49,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:49,136 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:49,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:49,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:49,344 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 01:32:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:49,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1358262476, now seen corresponding path program 1 times [2021-11-07 01:32:49,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:49,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251528863] [2021-11-07 01:32:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:49,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:49,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:49,347 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:49,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:32:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:49,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:32:49,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:50,256 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 01:32:50,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:50,565 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 01:32:50,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:50,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251528863] [2021-11-07 01:32:50,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251528863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:50,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:50,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:32:50,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862301629] [2021-11-07 01:32:50,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:50,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:50,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:50,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:50,567 INFO L87 Difference]: Start difference. First operand 17020 states and 31145 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 01:32:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:56,022 INFO L93 Difference]: Finished difference Result 93961 states and 173087 transitions. [2021-11-07 01:32:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:32:56,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:32:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:56,133 INFO L225 Difference]: With dead ends: 93961 [2021-11-07 01:32:56,133 INFO L226 Difference]: Without dead ends: 81466 [2021-11-07 01:32:56,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 150 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 01:32:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81466 states. [2021-11-07 01:32:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81466 to 27538. [2021-11-07 01:32:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27538 states, 27533 states have (on average 1.8387026477318127) internal successors, (50625), 27537 states have internal predecessors, (50625), 0 states have call successors, (0), 0 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 01:32:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27538 states to 27538 states and 50625 transitions. [2021-11-07 01:32:58,146 INFO L78 Accepts]: Start accepts. Automaton has 27538 states and 50625 transitions. Word has length 78 [2021-11-07 01:32:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:58,146 INFO L470 AbstractCegarLoop]: Abstraction has 27538 states and 50625 transitions. [2021-11-07 01:32:58,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 01:32:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 27538 states and 50625 transitions. [2021-11-07 01:32:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:32:58,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:58,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:58,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:58,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:58,350 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 01:32:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1686905421, now seen corresponding path program 1 times [2021-11-07 01:32:58,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:58,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515105974] [2021-11-07 01:32:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:58,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:58,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:58,352 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:58,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:32:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:32:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:59,216 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 01:32:59,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:59,391 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 01:32:59,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:59,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515105974] [2021-11-07 01:32:59,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515105974] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:59,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:59,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:32:59,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595929475] [2021-11-07 01:32:59,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:59,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:59,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:59,393 INFO L87 Difference]: Start difference. First operand 27538 states and 50625 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:00,838 INFO L93 Difference]: Finished difference Result 50683 states and 93050 transitions. [2021-11-07 01:33:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:33:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:00,880 INFO L225 Difference]: With dead ends: 50683 [2021-11-07 01:33:00,880 INFO L226 Difference]: Without dead ends: 27553 [2021-11-07 01:33:00,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 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 01:33:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27553 states. [2021-11-07 01:33:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27553 to 27538. [2021-11-07 01:33:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27538 states, 27533 states have (on average 1.8315839174808413) internal successors, (50429), 27537 states have internal predecessors, (50429), 0 states have call successors, (0), 0 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 01:33:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27538 states to 27538 states and 50429 transitions. [2021-11-07 01:33:02,713 INFO L78 Accepts]: Start accepts. Automaton has 27538 states and 50429 transitions. Word has length 85 [2021-11-07 01:33:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:02,713 INFO L470 AbstractCegarLoop]: Abstraction has 27538 states and 50429 transitions. [2021-11-07 01:33:02,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 27538 states and 50429 transitions. [2021-11-07 01:33:02,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:33:02,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:02,716 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:02,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:02,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:02,917 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 01:33:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash 417049913, now seen corresponding path program 1 times [2021-11-07 01:33:02,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:02,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885436512] [2021-11-07 01:33:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:02,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:02,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:02,919 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:02,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:33:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:33:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:03,969 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 01:33:03,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:04,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:04,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885436512] [2021-11-07 01:33:04,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885436512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:04,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:04,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:33:04,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946808398] [2021-11-07 01:33:04,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:04,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:04,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:04,249 INFO L87 Difference]: Start difference. First operand 27538 states and 50429 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 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 01:33:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:09,277 INFO L93 Difference]: Finished difference Result 80135 states and 146545 transitions. [2021-11-07 01:33:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:33:09,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:33:09,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:09,349 INFO L225 Difference]: With dead ends: 80135 [2021-11-07 01:33:09,349 INFO L226 Difference]: Without dead ends: 57343 [2021-11-07 01:33:09,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 166 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 01:33:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57343 states. [2021-11-07 01:33:10,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57343 to 22970. [2021-11-07 01:33:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22970 states, 22965 states have (on average 1.8215980840409318) internal successors, (41833), 22969 states have internal predecessors, (41833), 0 states have call successors, (0), 0 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 01:33:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22970 states to 22970 states and 41833 transitions. [2021-11-07 01:33:10,863 INFO L78 Accepts]: Start accepts. Automaton has 22970 states and 41833 transitions. Word has length 86 [2021-11-07 01:33:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:10,864 INFO L470 AbstractCegarLoop]: Abstraction has 22970 states and 41833 transitions. [2021-11-07 01:33:10,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 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 01:33:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 22970 states and 41833 transitions. [2021-11-07 01:33:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:33:10,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:10,867 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:10,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:11,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:11,077 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 01:33:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash -594067337, now seen corresponding path program 1 times [2021-11-07 01:33:11,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:11,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411629791] [2021-11-07 01:33:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:11,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:11,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:11,080 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:11,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:33:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:33:11,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:12,075 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 01:33:12,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:12,364 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 01:33:12,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:12,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411629791] [2021-11-07 01:33:12,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411629791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:12,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:12,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:33:12,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534764801] [2021-11-07 01:33:12,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:33:12,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:12,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:33:12,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:33:12,366 INFO L87 Difference]: Start difference. First operand 22970 states and 41833 transitions. Second operand has 10 states, 10 states have (on average 16.3) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 01:33:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:27,988 INFO L93 Difference]: Finished difference Result 159201 states and 287973 transitions. [2021-11-07 01:33:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:33:27,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.3) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:33:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:28,198 INFO L225 Difference]: With dead ends: 159201 [2021-11-07 01:33:28,198 INFO L226 Difference]: Without dead ends: 138178 [2021-11-07 01:33:28,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:33:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138178 states. [2021-11-07 01:33:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138178 to 57353. [2021-11-07 01:33:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57353 states, 57348 states have (on average 1.8174129873753226) internal successors, (104225), 57352 states have internal predecessors, (104225), 0 states have call successors, (0), 0 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 01:33:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57353 states to 57353 states and 104225 transitions. [2021-11-07 01:33:32,395 INFO L78 Accepts]: Start accepts. Automaton has 57353 states and 104225 transitions. Word has length 86 [2021-11-07 01:33:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:32,395 INFO L470 AbstractCegarLoop]: Abstraction has 57353 states and 104225 transitions. [2021-11-07 01:33:32,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.3) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 01:33:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 57353 states and 104225 transitions. [2021-11-07 01:33:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:33:32,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:32,399 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:32,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 01:33:32,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:32,614 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:33:32,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:32,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1621535801, now seen corresponding path program 1 times [2021-11-07 01:33:32,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:32,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089084800] [2021-11-07 01:33:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:32,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:32,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:32,616 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:32,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0605f5a4-5d13-4830-93e1-805511941f7f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:33:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:33,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:33,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:33,653 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 01:33:33,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:33,904 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 01:33:33,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:33,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089084800] [2021-11-07 01:33:33,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089084800] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:33,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:33,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:33,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351078524] [2021-11-07 01:33:33,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:33,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:33,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:33,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:33,906 INFO L87 Difference]: Start difference. First operand 57353 states and 104225 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)