./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.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_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/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_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/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_3e498c88-808e-4021-9753-ae24a6ad219c/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 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:45:11,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:45:11,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:45:11,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:45:11,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:45:11,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:45:11,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:45:11,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:45:11,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:45:11,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:45:11,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:45:11,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:45:11,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:45:11,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:45:11,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:45:11,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:45:11,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:45:11,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:45:11,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:45:11,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:45:11,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:45:11,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:45:11,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:45:11,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:45:11,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:45:11,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:45:11,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:45:11,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:45:11,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:45:11,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:45:11,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:45:11,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:45:11,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:45:11,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:45:11,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:45:11,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:45:11,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:45:11,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:45:11,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:45:11,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:45:11,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:45:11,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:45:11,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:45:11,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:45:11,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:45:11,200 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:45:11,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:45:11,201 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:45:11,201 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:45:11,201 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:45:11,201 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:45:11,202 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:45:11,203 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:45:11,203 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:45:11,203 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:45:11,203 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:45:11,204 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:45:11,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:45:11,205 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:45:11,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:45:11,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:45:11,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:45:11,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:45:11,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:45:11,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:45:11,206 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:45:11,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:45:11,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:45:11,207 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:45:11,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:45:11,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:45:11,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:45:11,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:11,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:45:11,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:45:11,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:45:11,210 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:45:11,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:45:11,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:45:11,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:45:11,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:45:11,211 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_3e498c88-808e-4021-9753-ae24a6ad219c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2021-11-07 01:45:11,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:45:11,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:45:11,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:45:11,514 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:45:11,515 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:45:11,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-07 01:45:11,589 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/data/d3e3638c5/a03623692e23432ea2604eeebed33fa5/FLAGd83d24f15 [2021-11-07 01:45:12,303 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:45:12,304 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-07 01:45:12,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/data/d3e3638c5/a03623692e23432ea2604eeebed33fa5/FLAGd83d24f15 [2021-11-07 01:45:12,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/data/d3e3638c5/a03623692e23432ea2604eeebed33fa5 [2021-11-07 01:45:12,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:45:12,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:45:12,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:12,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:45:12,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:45:12,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd8925f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:12, skipping insertion in model container [2021-11-07 01:45:12,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:12" (1/1) ... [2021-11-07 01:45:12,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:45:12,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:13,057 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_3e498c88-808e-4021-9753-ae24a6ad219c/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-07 01:45:13,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:13,211 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 01:45:13,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e595244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:13, skipping insertion in model container [2021-11-07 01:45:13,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:13,212 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:45:13,214 INFO L168 Benchmark]: Toolchain (without parser) took 749.78 ms. Allocated memory is still 113.2 MB. Free memory was 79.4 MB in the beginning and 72.2 MB in the end (delta: 7.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:13,215 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory was 66.2 MB in the beginning and 66.2 MB in the end (delta: 51.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:45:13,216 INFO L168 Benchmark]: CACSL2BoogieTranslator took 745.21 ms. Allocated memory is still 113.2 MB. Free memory was 79.2 MB in the beginning and 72.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:13,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory was 66.2 MB in the beginning and 66.2 MB in the end (delta: 51.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 745.21 ms. Allocated memory is still 113.2 MB. Free memory was 79.2 MB in the beginning and 72.2 MB in the end (delta: 7.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 933]: 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_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/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_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/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_3e498c88-808e-4021-9753-ae24a6ad219c/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 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:45:15,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:45:15,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:45:15,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:45:15,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:45:15,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:45:15,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:45:15,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:45:15,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:45:15,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:45:15,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:45:15,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:45:15,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:45:15,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:45:15,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:45:15,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:45:15,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:45:15,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:45:15,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:45:15,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:45:15,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:45:15,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:45:15,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:45:15,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:45:15,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:45:15,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:45:15,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:45:15,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:45:15,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:45:15,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:45:15,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:45:15,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:45:15,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:45:15,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:45:15,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:45:15,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:45:15,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:45:15,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:45:15,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:45:15,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:45:15,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:45:15,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:45:15,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:45:15,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:45:15,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:45:15,890 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:45:15,891 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:45:15,891 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:45:15,891 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:45:15,891 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:45:15,892 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:45:15,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:45:15,895 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:45:15,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:45:15,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:45:15,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:45:15,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:45:15,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:45:15,896 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:45:15,897 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:45:15,897 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:45:15,897 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:45:15,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:45:15,898 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:45:15,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:45:15,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:45:15,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:45:15,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:45:15,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:15,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:45:15,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:45:15,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:45:15,900 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:45:15,900 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:15,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:45:15,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:45:15,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:45:15,902 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_3e498c88-808e-4021-9753-ae24a6ad219c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2021-11-07 01:45:16,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:45:16,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:45:16,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:45:16,353 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:45:16,354 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:45:16,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-07 01:45:16,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/data/cd4c262df/88336c3b3fd24e5fbdc84cd889a1a99b/FLAG6ab7f9734 [2021-11-07 01:45:17,213 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:45:17,214 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2021-11-07 01:45:17,239 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/data/cd4c262df/88336c3b3fd24e5fbdc84cd889a1a99b/FLAG6ab7f9734 [2021-11-07 01:45:17,346 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/data/cd4c262df/88336c3b3fd24e5fbdc84cd889a1a99b [2021-11-07 01:45:17,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:45:17,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:45:17,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:17,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:45:17,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:45:17,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:17" (1/1) ... [2021-11-07 01:45:17,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a1b8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:17, skipping insertion in model container [2021-11-07 01:45:17,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:17" (1/1) ... [2021-11-07 01:45:17,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:45:17,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:17,970 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_3e498c88-808e-4021-9753-ae24a6ad219c/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-07 01:45:18,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:18,107 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:45:18,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:18,197 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_3e498c88-808e-4021-9753-ae24a6ad219c/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-07 01:45:18,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:18,251 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:45:18,319 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_3e498c88-808e-4021-9753-ae24a6ad219c/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2021-11-07 01:45:18,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:18,445 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:45:18,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18 WrapperNode [2021-11-07 01:45:18,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:18,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:45:18,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:45:18,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:45:18,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (1/1) ... [2021-11-07 01:45:18,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (1/1) ... [2021-11-07 01:45:18,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:45:18,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:45:18,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:45:18,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:45:18,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (1/1) ... [2021-11-07 01:45:18,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (1/1) ... [2021-11-07 01:45:19,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (1/1) ... [2021-11-07 01:45:19,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (1/1) ... [2021-11-07 01:45:19,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (1/1) ... [2021-11-07 01:45:19,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (1/1) ... [2021-11-07 01:45:19,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (1/1) ... [2021-11-07 01:45:19,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:45:19,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:45:19,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:45:19,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:45:19,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (1/1) ... [2021-11-07 01:45:19,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:19,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:19,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:45:20,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:45:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:45:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:45:20,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:45:20,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:45:39,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:45:39,731 INFO L299 CfgBuilder]: Removed 1709 assume(true) statements. [2021-11-07 01:45:39,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:45:39 BoogieIcfgContainer [2021-11-07 01:45:39,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:45:39,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:45:39,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:45:39,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:45:39,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:45:17" (1/3) ... [2021-11-07 01:45:39,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee1ec54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:45:39, skipping insertion in model container [2021-11-07 01:45:39,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:18" (2/3) ... [2021-11-07 01:45:39,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee1ec54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:45:39, skipping insertion in model container [2021-11-07 01:45:39,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:45:39" (3/3) ... [2021-11-07 01:45:39,752 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2021-11-07 01:45:39,758 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:45:39,758 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:45:39,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:45:39,856 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 01:45:39,856 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:45:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 7188 states, 7182 states have (on average 1.8876357560568087) internal successors, (13557), 7187 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:45:40,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:40,007 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 01:45:40,008 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 01:45:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:40,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1414304943, now seen corresponding path program 1 times [2021-11-07 01:45:40,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:40,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644089536] [2021-11-07 01:45:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:40,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:40,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:40,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:40,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:45:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:45:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:40,556 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 01:45:40,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:40,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:40,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644089536] [2021-11-07 01:45:40,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644089536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:40,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:40,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:45:40,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805898324] [2021-11-07 01:45:40,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:45:40,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:45:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:45:40,680 INFO L87 Difference]: Start difference. First operand has 7188 states, 7182 states have (on average 1.8876357560568087) internal successors, (13557), 7187 states have internal predecessors, (13557), 0 states have call successors, (0), 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 01:45:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:41,142 INFO L93 Difference]: Finished difference Result 7207 states and 13580 transitions. [2021-11-07 01:45:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:45:41,144 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 01:45:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:41,234 INFO L225 Difference]: With dead ends: 7207 [2021-11-07 01:45:41,235 INFO L226 Difference]: Without dead ends: 7184 [2021-11-07 01:45:41,250 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 01:45:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7184 states. [2021-11-07 01:45:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7184 to 7184. [2021-11-07 01:45:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7184 states, 7179 states have (on average 1.8867530296698705) internal successors, (13545), 7183 states have internal predecessors, (13545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7184 states to 7184 states and 13545 transitions. [2021-11-07 01:45:41,627 INFO L78 Accepts]: Start accepts. Automaton has 7184 states and 13545 transitions. Word has length 27 [2021-11-07 01:45:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:41,628 INFO L470 AbstractCegarLoop]: Abstraction has 7184 states and 13545 transitions. [2021-11-07 01:45:41,628 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 01:45:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 7184 states and 13545 transitions. [2021-11-07 01:45:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:45:41,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:41,633 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 01:45:41,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:41,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:41,848 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 01:45:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:41,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1556821425, now seen corresponding path program 1 times [2021-11-07 01:45:41,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:41,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056625521] [2021-11-07 01:45:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:41,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:41,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:41,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:41,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:45:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:42,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:45:42,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:42,374 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 01:45:42,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:42,481 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 01:45:42,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:42,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056625521] [2021-11-07 01:45:42,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056625521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:42,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:42,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:45:42,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477665490] [2021-11-07 01:45:42,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:42,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:42,493 INFO L87 Difference]: Start difference. First operand 7184 states and 13545 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 01:45:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:43,012 INFO L93 Difference]: Finished difference Result 14355 states and 27071 transitions. [2021-11-07 01:45:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:43,012 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 01:45:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:43,065 INFO L225 Difference]: With dead ends: 14355 [2021-11-07 01:45:43,065 INFO L226 Difference]: Without dead ends: 7184 [2021-11-07 01:45:43,085 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 01:45:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7184 states. [2021-11-07 01:45:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7184 to 7184. [2021-11-07 01:45:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7184 states, 7179 states have (on average 1.8859172586711241) internal successors, (13539), 7183 states have internal predecessors, (13539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7184 states to 7184 states and 13539 transitions. [2021-11-07 01:45:43,416 INFO L78 Accepts]: Start accepts. Automaton has 7184 states and 13539 transitions. Word has length 29 [2021-11-07 01:45:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:43,417 INFO L470 AbstractCegarLoop]: Abstraction has 7184 states and 13539 transitions. [2021-11-07 01:45:43,419 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 01:45:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7184 states and 13539 transitions. [2021-11-07 01:45:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:45:43,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:43,433 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 01:45:43,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:43,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:43,652 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 01:45:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:43,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1675267835, now seen corresponding path program 1 times [2021-11-07 01:45:43,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:43,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39051627] [2021-11-07 01:45:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:43,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:43,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:43,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:43,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:45:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:44,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:45:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:44,265 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 01:45:44,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:44,384 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 01:45:44,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:44,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39051627] [2021-11-07 01:45:44,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39051627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:44,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:44,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:45:44,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758612240] [2021-11-07 01:45:44,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:44,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:45:44,388 INFO L87 Difference]: Start difference. First operand 7184 states and 13539 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 01:45:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:45,056 INFO L93 Difference]: Finished difference Result 14319 states and 26994 transitions. [2021-11-07 01:45:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:45:45,057 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 01:45:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:45,134 INFO L225 Difference]: With dead ends: 14319 [2021-11-07 01:45:45,135 INFO L226 Difference]: Without dead ends: 7157 [2021-11-07 01:45:45,147 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 01:45:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2021-11-07 01:45:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 7157. [2021-11-07 01:45:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7152 states have (on average 1.8852069351230425) internal successors, (13483), 7156 states have internal predecessors, (13483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 13483 transitions. [2021-11-07 01:45:45,480 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 13483 transitions. Word has length 34 [2021-11-07 01:45:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:45,480 INFO L470 AbstractCegarLoop]: Abstraction has 7157 states and 13483 transitions. [2021-11-07 01:45:45,481 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 01:45:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 13483 transitions. [2021-11-07 01:45:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:45:45,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:45,483 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 01:45:45,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:45,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:45,698 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 01:45:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:45,702 INFO L85 PathProgramCache]: Analyzing trace with hash -634445021, now seen corresponding path program 1 times [2021-11-07 01:45:45,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:45,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601417878] [2021-11-07 01:45:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:45,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:45,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:45,705 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:45,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:45:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:46,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:45:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:46,219 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 01:45:46,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:46,328 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 01:45:46,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:46,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601417878] [2021-11-07 01:45:46,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601417878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:46,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:46,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:45:46,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254533602] [2021-11-07 01:45:46,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:46,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:46,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:46,332 INFO L87 Difference]: Start difference. First operand 7157 states and 13483 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 01:45:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:46,790 INFO L93 Difference]: Finished difference Result 14292 states and 26938 transitions. [2021-11-07 01:45:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:46,790 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 01:45:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:46,815 INFO L225 Difference]: With dead ends: 14292 [2021-11-07 01:45:46,815 INFO L226 Difference]: Without dead ends: 7157 [2021-11-07 01:45:46,828 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 01:45:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2021-11-07 01:45:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 7157. [2021-11-07 01:45:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7152 states have (on average 1.884368008948546) internal successors, (13477), 7156 states have internal predecessors, (13477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 13477 transitions. [2021-11-07 01:45:47,151 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 13477 transitions. Word has length 35 [2021-11-07 01:45:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:47,152 INFO L470 AbstractCegarLoop]: Abstraction has 7157 states and 13477 transitions. [2021-11-07 01:45:47,153 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 01:45:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 13477 transitions. [2021-11-07 01:45:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:45:47,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:47,157 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 01:45:47,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:47,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:47,372 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 01:45:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash -819630094, now seen corresponding path program 1 times [2021-11-07 01:45:47,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:47,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774241560] [2021-11-07 01:45:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:47,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:47,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:47,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:47,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:45:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:47,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:45:47,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:47,939 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 01:45:47,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:48,105 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 01:45:48,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:48,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774241560] [2021-11-07 01:45:48,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774241560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:48,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:48,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:45:48,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639315956] [2021-11-07 01:45:48,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:45:48,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:45:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:45:48,108 INFO L87 Difference]: Start difference. First operand 7157 states and 13477 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 01:45:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:48,741 INFO L93 Difference]: Finished difference Result 14286 states and 26921 transitions. [2021-11-07 01:45:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:45:48,741 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 01:45:48,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:48,765 INFO L225 Difference]: With dead ends: 14286 [2021-11-07 01:45:48,765 INFO L226 Difference]: Without dead ends: 7154 [2021-11-07 01:45:48,778 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 01:45:48,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2021-11-07 01:45:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 7154. [2021-11-07 01:45:49,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 7149 states have (on average 1.8840397258357813) internal successors, (13469), 7153 states have internal predecessors, (13469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 13469 transitions. [2021-11-07 01:45:49,108 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 13469 transitions. Word has length 40 [2021-11-07 01:45:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:49,109 INFO L470 AbstractCegarLoop]: Abstraction has 7154 states and 13469 transitions. [2021-11-07 01:45:49,109 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 01:45:49,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 13469 transitions. [2021-11-07 01:45:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:45:49,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:49,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:49,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:49,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:49,326 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 01:45:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1861414946, now seen corresponding path program 1 times [2021-11-07 01:45:49,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:49,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970675392] [2021-11-07 01:45:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:49,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:49,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:49,330 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:49,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:45:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:49,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:45:49,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:50,102 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 01:45:50,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:50,292 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 01:45:50,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:50,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970675392] [2021-11-07 01:45:50,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970675392] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:50,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:50,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:45:50,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157074236] [2021-11-07 01:45:50,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:50,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:50,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:50,295 INFO L87 Difference]: Start difference. First operand 7154 states and 13469 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 01:45:52,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:52,262 INFO L93 Difference]: Finished difference Result 18488 states and 34876 transitions. [2021-11-07 01:45:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:45:52,267 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 01:45:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:52,322 INFO L225 Difference]: With dead ends: 18488 [2021-11-07 01:45:52,322 INFO L226 Difference]: Without dead ends: 14869 [2021-11-07 01:45:52,332 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 01:45:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14869 states. [2021-11-07 01:45:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14869 to 9296. [2021-11-07 01:45:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9296 states, 9291 states have (on average 1.8852653105155528) internal successors, (17516), 9295 states have internal predecessors, (17516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9296 states to 9296 states and 17516 transitions. [2021-11-07 01:45:52,991 INFO L78 Accepts]: Start accepts. Automaton has 9296 states and 17516 transitions. Word has length 41 [2021-11-07 01:45:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:52,991 INFO L470 AbstractCegarLoop]: Abstraction has 9296 states and 17516 transitions. [2021-11-07 01:45:52,992 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 01:45:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 9296 states and 17516 transitions. [2021-11-07 01:45:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:45:52,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:53,000 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 01:45:53,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:53,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:53,214 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 01:45:53,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:53,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1944405844, now seen corresponding path program 1 times [2021-11-07 01:45:53,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:53,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628891568] [2021-11-07 01:45:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:53,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:53,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:53,221 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:53,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:45:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:53,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:45:53,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:53,960 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 01:45:53,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:54,215 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 01:45:54,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:54,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628891568] [2021-11-07 01:45:54,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628891568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:54,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:54,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:45:54,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622251162] [2021-11-07 01:45:54,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:45:54,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:45:54,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:45:54,218 INFO L87 Difference]: Start difference. First operand 9296 states and 17516 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 01:45:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:55,391 INFO L93 Difference]: Finished difference Result 17398 states and 32574 transitions. [2021-11-07 01:45:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:45:55,392 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 01:45:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:55,417 INFO L225 Difference]: With dead ends: 17398 [2021-11-07 01:45:55,417 INFO L226 Difference]: Without dead ends: 9365 [2021-11-07 01:45:55,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:45:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9365 states. [2021-11-07 01:45:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9365 to 6531. [2021-11-07 01:45:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6531 states, 6526 states have (on average 1.8786392889978547) internal successors, (12260), 6530 states have internal predecessors, (12260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6531 states to 6531 states and 12260 transitions. [2021-11-07 01:45:55,791 INFO L78 Accepts]: Start accepts. Automaton has 6531 states and 12260 transitions. Word has length 60 [2021-11-07 01:45:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:55,792 INFO L470 AbstractCegarLoop]: Abstraction has 6531 states and 12260 transitions. [2021-11-07 01:45:55,792 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 01:45:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 6531 states and 12260 transitions. [2021-11-07 01:45:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:45:55,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:55,796 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 01:45:55,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:56,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:56,010 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 01:45:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:56,011 INFO L85 PathProgramCache]: Analyzing trace with hash 806098474, now seen corresponding path program 1 times [2021-11-07 01:45:56,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:56,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058869975] [2021-11-07 01:45:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:56,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:56,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:56,016 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:56,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:45:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:56,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:56,793 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 01:45:56,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:57,029 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 01:45:57,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:57,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058869975] [2021-11-07 01:45:57,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058869975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:57,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:57,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:45:57,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753732033] [2021-11-07 01:45:57,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:57,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:45:57,032 INFO L87 Difference]: Start difference. First operand 6531 states and 12260 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 01:46:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:02,591 INFO L93 Difference]: Finished difference Result 22897 states and 43008 transitions. [2021-11-07 01:46:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:46:02,604 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 01:46:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:02,659 INFO L225 Difference]: With dead ends: 22897 [2021-11-07 01:46:02,659 INFO L226 Difference]: Without dead ends: 16400 [2021-11-07 01:46:02,674 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 01:46:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16400 states. [2021-11-07 01:46:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16400 to 6531. [2021-11-07 01:46:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6531 states, 6526 states have (on average 1.8231688630095004) internal successors, (11898), 6530 states have internal predecessors, (11898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6531 states to 6531 states and 11898 transitions. [2021-11-07 01:46:03,130 INFO L78 Accepts]: Start accepts. Automaton has 6531 states and 11898 transitions. Word has length 61 [2021-11-07 01:46:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:03,130 INFO L470 AbstractCegarLoop]: Abstraction has 6531 states and 11898 transitions. [2021-11-07 01:46:03,131 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 01:46:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 6531 states and 11898 transitions. [2021-11-07 01:46:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:46:03,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:03,134 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 01:46:03,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:03,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:03,353 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 01:46:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:03,353 INFO L85 PathProgramCache]: Analyzing trace with hash -488243434, now seen corresponding path program 1 times [2021-11-07 01:46:03,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:03,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773393755] [2021-11-07 01:46:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:03,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:03,357 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:03,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:46:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:03,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:46:03,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:04,212 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 01:46:04,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:04,442 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 01:46:04,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:04,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773393755] [2021-11-07 01:46:04,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773393755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:04,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:04,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:46:04,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524782803] [2021-11-07 01:46:04,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:04,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:04,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:04,445 INFO L87 Difference]: Start difference. First operand 6531 states and 11898 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 01:46:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:07,413 INFO L93 Difference]: Finished difference Result 17909 states and 32912 transitions. [2021-11-07 01:46:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:46:07,414 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 01:46:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:07,445 INFO L225 Difference]: With dead ends: 17909 [2021-11-07 01:46:07,446 INFO L226 Difference]: Without dead ends: 11439 [2021-11-07 01:46:07,458 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 01:46:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11439 states. [2021-11-07 01:46:07,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11439 to 6427. [2021-11-07 01:46:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 6422 states have (on average 1.8240423544067268) internal successors, (11714), 6426 states have internal predecessors, (11714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 11714 transitions. [2021-11-07 01:46:07,983 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 11714 transitions. Word has length 69 [2021-11-07 01:46:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:07,983 INFO L470 AbstractCegarLoop]: Abstraction has 6427 states and 11714 transitions. [2021-11-07 01:46:07,983 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 01:46:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 11714 transitions. [2021-11-07 01:46:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:46:07,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:07,988 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 01:46:08,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:08,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:08,203 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 01:46:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash 285348761, now seen corresponding path program 1 times [2021-11-07 01:46:08,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:08,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638821825] [2021-11-07 01:46:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:08,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:08,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:08,206 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:08,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:46:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:08,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:08,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:09,324 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 01:46:09,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:10,891 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 01:46:10,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:10,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638821825] [2021-11-07 01:46:10,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638821825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:10,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:10,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:46:10,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230979426] [2021-11-07 01:46:10,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:10,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:10,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:10,894 INFO L87 Difference]: Start difference. First operand 6427 states and 11714 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:14,574 INFO L93 Difference]: Finished difference Result 20310 states and 37035 transitions. [2021-11-07 01:46:14,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:46:14,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:46:14,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:14,623 INFO L225 Difference]: With dead ends: 20310 [2021-11-07 01:46:14,624 INFO L226 Difference]: Without dead ends: 13936 [2021-11-07 01:46:14,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:46:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13936 states. [2021-11-07 01:46:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13936 to 8874. [2021-11-07 01:46:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8874 states, 8869 states have (on average 1.811139925583493) internal successors, (16063), 8873 states have internal predecessors, (16063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8874 states to 8874 states and 16063 transitions. [2021-11-07 01:46:15,315 INFO L78 Accepts]: Start accepts. Automaton has 8874 states and 16063 transitions. Word has length 72 [2021-11-07 01:46:15,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:15,315 INFO L470 AbstractCegarLoop]: Abstraction has 8874 states and 16063 transitions. [2021-11-07 01:46:15,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 8874 states and 16063 transitions. [2021-11-07 01:46:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:46:15,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:15,319 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:15,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 01:46:15,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:15,534 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 01:46:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash -839160094, now seen corresponding path program 1 times [2021-11-07 01:46:15,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:15,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559372150] [2021-11-07 01:46:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:15,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:15,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:15,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:15,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:46:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:16,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:16,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:16,419 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 01:46:16,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:16,735 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 01:46:16,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:16,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559372150] [2021-11-07 01:46:16,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559372150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:16,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:16,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:46:16,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066558587] [2021-11-07 01:46:16,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:46:16,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:46:16,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:46:16,738 INFO L87 Difference]: Start difference. First operand 8874 states and 16063 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:23,173 INFO L93 Difference]: Finished difference Result 35220 states and 64175 transitions. [2021-11-07 01:46:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:46:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:46:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:23,224 INFO L225 Difference]: With dead ends: 35220 [2021-11-07 01:46:23,224 INFO L226 Difference]: Without dead ends: 26398 [2021-11-07 01:46:23,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 141 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 01:46:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26398 states. [2021-11-07 01:46:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26398 to 8888. [2021-11-07 01:46:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8888 states, 8883 states have (on average 1.8098615332657886) internal successors, (16077), 8887 states have internal predecessors, (16077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8888 states to 8888 states and 16077 transitions. [2021-11-07 01:46:23,967 INFO L78 Accepts]: Start accepts. Automaton has 8888 states and 16077 transitions. Word has length 73 [2021-11-07 01:46:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:23,969 INFO L470 AbstractCegarLoop]: Abstraction has 8888 states and 16077 transitions. [2021-11-07 01:46:23,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 8888 states and 16077 transitions. [2021-11-07 01:46:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:46:23,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:23,982 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 01:46:23,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:24,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:24,195 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 01:46:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash 999624567, now seen corresponding path program 1 times [2021-11-07 01:46:24,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:24,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360073364] [2021-11-07 01:46:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:24,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:24,199 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:24,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:46:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:24,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:25,151 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 01:46:25,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:25,373 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 01:46:25,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:25,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360073364] [2021-11-07 01:46:25,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360073364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:25,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:25,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:46:25,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518719262] [2021-11-07 01:46:25,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:46:25,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:25,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:46:25,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:46:25,375 INFO L87 Difference]: Start difference. First operand 8888 states and 16077 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 01:46:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:38,640 INFO L93 Difference]: Finished difference Result 27652 states and 50376 transitions. [2021-11-07 01:46:38,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:46:38,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 74 [2021-11-07 01:46:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:38,687 INFO L225 Difference]: With dead ends: 27652 [2021-11-07 01:46:38,687 INFO L226 Difference]: Without dead ends: 20432 [2021-11-07 01:46:38,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20432 states. [2021-11-07 01:46:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20432 to 15432. [2021-11-07 01:46:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15432 states, 15427 states have (on average 1.811304855124133) internal successors, (27943), 15431 states have internal predecessors, (27943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15432 states to 15432 states and 27943 transitions. [2021-11-07 01:46:39,546 INFO L78 Accepts]: Start accepts. Automaton has 15432 states and 27943 transitions. Word has length 74 [2021-11-07 01:46:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:39,547 INFO L470 AbstractCegarLoop]: Abstraction has 15432 states and 27943 transitions. [2021-11-07 01:46:39,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 01:46:39,547 INFO L276 IsEmpty]: Start isEmpty. Operand 15432 states and 27943 transitions. [2021-11-07 01:46:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:46:39,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:39,553 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 01:46:39,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:39,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:39,767 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 01:46:39,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash -11492683, now seen corresponding path program 1 times [2021-11-07 01:46:39,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:39,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704620021] [2021-11-07 01:46:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:39,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:39,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:39,770 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:39,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:46:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:40,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:40,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:40,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:40,814 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 01:46:40,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:40,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704620021] [2021-11-07 01:46:40,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704620021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:40,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:40,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:46:40,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910926813] [2021-11-07 01:46:40,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:40,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:40,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:40,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:46:40,817 INFO L87 Difference]: Start difference. First operand 15432 states and 27943 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 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 01:46:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:46,095 INFO L93 Difference]: Finished difference Result 34844 states and 63331 transitions. [2021-11-07 01:46:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:46:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 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 01:46:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:46,132 INFO L225 Difference]: With dead ends: 34844 [2021-11-07 01:46:46,133 INFO L226 Difference]: Without dead ends: 21065 [2021-11-07 01:46:46,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 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 01:46:46,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21065 states. [2021-11-07 01:46:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21065 to 15949. [2021-11-07 01:46:47,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15949 states, 15944 states have (on average 1.7844957350727546) internal successors, (28452), 15948 states have internal predecessors, (28452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15949 states to 15949 states and 28452 transitions. [2021-11-07 01:46:47,057 INFO L78 Accepts]: Start accepts. Automaton has 15949 states and 28452 transitions. Word has length 74 [2021-11-07 01:46:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:47,057 INFO L470 AbstractCegarLoop]: Abstraction has 15949 states and 28452 transitions. [2021-11-07 01:46:47,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 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 01:46:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 15949 states and 28452 transitions. [2021-11-07 01:46:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:46:47,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:47,060 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 01:46:47,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:47,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:47,260 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 01:46:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1348585297, now seen corresponding path program 1 times [2021-11-07 01:46:47,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:47,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443538032] [2021-11-07 01:46:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:47,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:47,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:47,262 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:47,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:46:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:47,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:46:47,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:48,084 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 01:46:48,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:48,295 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 01:46:48,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:48,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443538032] [2021-11-07 01:46:48,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443538032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:48,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:48,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:46:48,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502402635] [2021-11-07 01:46:48,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:46:48,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:48,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:46:48,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:46:48,298 INFO L87 Difference]: Start difference. First operand 15949 states and 28452 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 01:46:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:54,067 INFO L93 Difference]: Finished difference Result 113322 states and 203651 transitions. [2021-11-07 01:46:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:46:54,068 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 01:46:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:54,228 INFO L225 Difference]: With dead ends: 113322 [2021-11-07 01:46:54,228 INFO L226 Difference]: Without dead ends: 97421 [2021-11-07 01:46:54,258 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 01:46:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97421 states. [2021-11-07 01:46:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97421 to 25771. [2021-11-07 01:46:56,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25771 states, 25766 states have (on average 1.7930994333617947) internal successors, (46201), 25770 states have internal predecessors, (46201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25771 states to 25771 states and 46201 transitions. [2021-11-07 01:46:56,384 INFO L78 Accepts]: Start accepts. Automaton has 25771 states and 46201 transitions. Word has length 76 [2021-11-07 01:46:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:56,385 INFO L470 AbstractCegarLoop]: Abstraction has 25771 states and 46201 transitions. [2021-11-07 01:46:56,385 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 01:46:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 25771 states and 46201 transitions. [2021-11-07 01:46:56,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:46:56,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:56,387 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 01:46:56,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:56,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:56,603 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 01:46:56,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1420971855, now seen corresponding path program 1 times [2021-11-07 01:46:56,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:56,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985223209] [2021-11-07 01:46:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:56,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:56,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:56,607 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:56,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:46:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:46:57,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:57,679 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 01:46:57,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:57,904 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 01:46:57,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:57,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985223209] [2021-11-07 01:46:57,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985223209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:57,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:57,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:46:57,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873713360] [2021-11-07 01:46:57,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:57,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:57,907 INFO L87 Difference]: Start difference. First operand 25771 states and 46201 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 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 01:47:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:02,429 INFO L93 Difference]: Finished difference Result 63283 states and 114362 transitions. [2021-11-07 01:47:02,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:47:02,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 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 01:47:02,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:02,487 INFO L225 Difference]: With dead ends: 63283 [2021-11-07 01:47:02,487 INFO L226 Difference]: Without dead ends: 43146 [2021-11-07 01:47:02,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 146 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 01:47:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43146 states. [2021-11-07 01:47:04,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43146 to 25736. [2021-11-07 01:47:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25736 states, 25731 states have (on average 1.7928180016322723) internal successors, (46131), 25735 states have internal predecessors, (46131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25736 states to 25736 states and 46131 transitions. [2021-11-07 01:47:04,453 INFO L78 Accepts]: Start accepts. Automaton has 25736 states and 46131 transitions. Word has length 76 [2021-11-07 01:47:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:04,453 INFO L470 AbstractCegarLoop]: Abstraction has 25736 states and 46131 transitions. [2021-11-07 01:47:04,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 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 01:47:04,454 INFO L276 IsEmpty]: Start isEmpty. Operand 25736 states and 46131 transitions. [2021-11-07 01:47:04,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:47:04,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:04,457 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:04,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:04,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:04,657 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 01:47:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:04,658 INFO L85 PathProgramCache]: Analyzing trace with hash 987402275, now seen corresponding path program 1 times [2021-11-07 01:47:04,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:04,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568261391] [2021-11-07 01:47:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:04,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:04,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:04,659 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:04,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:47:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:05,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:05,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:05,642 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 01:47:05,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:05,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:05,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568261391] [2021-11-07 01:47:05,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568261391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:05,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:05,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:47:05,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991949305] [2021-11-07 01:47:05,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:47:05,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:05,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:47:05,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:05,910 INFO L87 Difference]: Start difference. First operand 25736 states and 46131 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:08,752 INFO L93 Difference]: Finished difference Result 69100 states and 124134 transitions. [2021-11-07 01:47:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:47:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:47:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:08,819 INFO L225 Difference]: With dead ends: 69100 [2021-11-07 01:47:08,819 INFO L226 Difference]: Without dead ends: 45267 [2021-11-07 01:47:08,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45267 states. [2021-11-07 01:47:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45267 to 45252. [2021-11-07 01:47:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45252 states, 45247 states have (on average 1.798483877384136) internal successors, (81376), 45251 states have internal predecessors, (81376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45252 states to 45252 states and 81376 transitions. [2021-11-07 01:47:11,493 INFO L78 Accepts]: Start accepts. Automaton has 45252 states and 81376 transitions. Word has length 83 [2021-11-07 01:47:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:11,493 INFO L470 AbstractCegarLoop]: Abstraction has 45252 states and 81376 transitions. [2021-11-07 01:47:11,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 45252 states and 81376 transitions. [2021-11-07 01:47:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:47:11,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:11,498 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:11,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:11,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:11,711 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 01:47:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:11,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1606438974, now seen corresponding path program 1 times [2021-11-07 01:47:11,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:11,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822652799] [2021-11-07 01:47:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:11,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:11,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:11,715 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:11,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e498c88-808e-4021-9753-ae24a6ad219c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:47:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:12,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:13,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:13,276 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 01:47:13,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:13,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822652799] [2021-11-07 01:47:13,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822652799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:13,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:13,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:47:13,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549216684] [2021-11-07 01:47:13,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:47:13,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:47:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:13,280 INFO L87 Difference]: Start difference. First operand 45252 states and 81376 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:18,232 INFO L93 Difference]: Finished difference Result 126372 states and 227497 transitions. [2021-11-07 01:47:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:47:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:47:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:18,380 INFO L225 Difference]: With dead ends: 126372 [2021-11-07 01:47:18,381 INFO L226 Difference]: Without dead ends: 84140 [2021-11-07 01:47:18,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84140 states.