./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH --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 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:31:17,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:31:17,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:31:18,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:31:18,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:31:18,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:31:18,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:31:18,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:31:18,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:31:18,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:31:18,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:31:18,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:31:18,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:31:18,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:31:18,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:31:18,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:31:18,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:31:18,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:31:18,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:31:18,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:31:18,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:31:18,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:31:18,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:31:18,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:31:18,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:31:18,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:31:18,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:31:18,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:31:18,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:31:18,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:31:18,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:31:18,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:31:18,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:31:18,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:31:18,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:31:18,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:31:18,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:31:18,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:31:18,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:31:18,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:31:18,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:31:18,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:31:18,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:31:18,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:31:18,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:31:18,185 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:31:18,185 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:31:18,186 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:31:18,186 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:31:18,186 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:31:18,187 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:31:18,187 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:31:18,187 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:31:18,188 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:31:18,188 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:31:18,188 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:31:18,189 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:31:18,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:31:18,190 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:31:18,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:31:18,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:31:18,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:31:18,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:31:18,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:31:18,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:31:18,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:31:18,192 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:31:18,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:31:18,193 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:31:18,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:31:18,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:31:18,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:31:18,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:31:18,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:31:18,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:31:18,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:31:18,196 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:31:18,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:31:18,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:31:18,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:31:18,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:31:18,197 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_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2021-11-03 04:31:18,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:31:18,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:31:18,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:31:18,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:31:18,502 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:31:18,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-03 04:31:18,609 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/data/bf17a1ae3/1ba1e2c56adf48b98cb5fdf46b01e634/FLAG3568b1a50 [2021-11-03 04:31:19,354 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:31:19,354 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-03 04:31:19,398 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/data/bf17a1ae3/1ba1e2c56adf48b98cb5fdf46b01e634/FLAG3568b1a50 [2021-11-03 04:31:19,603 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/data/bf17a1ae3/1ba1e2c56adf48b98cb5fdf46b01e634 [2021-11-03 04:31:19,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:31:19,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:31:19,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:31:19,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:31:19,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:31:19,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:31:19" (1/1) ... [2021-11-03 04:31:19,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245cf3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:19, skipping insertion in model container [2021-11-03 04:31:19,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:31:19" (1/1) ... [2021-11-03 04:31:19,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:31:19,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:31:19,931 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_e13314a9-52d5-43d4-ada0-efc1845442ef/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-03 04:31:20,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:31:20,449 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) [2021-11-03 04:31:20,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a890331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:20, skipping insertion in model container [2021-11-03 04:31:20,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:31:20,451 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:31:20,453 INFO L168 Benchmark]: Toolchain (without parser) took 844.35 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 65.5 MB in the beginning and 86.9 MB in the end (delta: -21.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:31:20,454 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 100.7 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:31:20,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 841.60 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 65.4 MB in the beginning and 86.9 MB in the end (delta: -21.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:31:20,457 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 100.7 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 841.60 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 65.4 MB in the beginning and 86.9 MB in the end (delta: -21.5 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: 1117]: 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_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH --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 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:31:23,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:31:23,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:31:23,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:31:23,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:31:23,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:31:23,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:31:23,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:31:23,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:31:23,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:31:23,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:31:23,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:31:23,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:31:23,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:31:23,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:31:23,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:31:23,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:31:23,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:31:23,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:31:23,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:31:23,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:31:23,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:31:23,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:31:23,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:31:23,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:31:23,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:31:23,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:31:23,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:31:23,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:31:23,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:31:23,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:31:23,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:31:23,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:31:23,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:31:23,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:31:23,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:31:23,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:31:23,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:31:23,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:31:23,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:31:23,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:31:23,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:31:23,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:31:23,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:31:23,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:31:23,219 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:31:23,219 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:31:23,220 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:31:23,220 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:31:23,220 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:31:23,220 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:31:23,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:31:23,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:31:23,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:31:23,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:31:23,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:31:23,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:31:23,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:31:23,225 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:31:23,226 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:31:23,226 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:31:23,226 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:31:23,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:31:23,227 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:31:23,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:31:23,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:31:23,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:31:23,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:31:23,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:31:23,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:31:23,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:31:23,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:31:23,229 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:31:23,230 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:31:23,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:31:23,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:31:23,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:31:23,231 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_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2021-11-03 04:31:23,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:31:23,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:31:23,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:31:23,715 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:31:23,716 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:31:23,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-03 04:31:23,795 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/data/5df023678/879ba21845014cfd8dacb1c546f85bfa/FLAG587ccc21d [2021-11-03 04:31:24,746 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:31:24,747 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-11-03 04:31:24,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/data/5df023678/879ba21845014cfd8dacb1c546f85bfa/FLAG587ccc21d [2021-11-03 04:31:24,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/data/5df023678/879ba21845014cfd8dacb1c546f85bfa [2021-11-03 04:31:24,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:31:24,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:31:24,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:31:24,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:31:24,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:31:24,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:31:24" (1/1) ... [2021-11-03 04:31:24,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@721128ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:24, skipping insertion in model container [2021-11-03 04:31:24,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:31:24" (1/1) ... [2021-11-03 04:31:24,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:31:24,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:31:25,137 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_e13314a9-52d5-43d4-ada0-efc1845442ef/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-03 04:31:25,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:31:25,781 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:31:25,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:31:25,812 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_e13314a9-52d5-43d4-ada0-efc1845442ef/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-03 04:31:25,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:31:26,002 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:31:26,018 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_e13314a9-52d5-43d4-ada0-efc1845442ef/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-11-03 04:31:26,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:31:26,167 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:31:26,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26 WrapperNode [2021-11-03 04:31:26,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:31:26,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:31:26,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:31:26,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:31:26,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (1/1) ... [2021-11-03 04:31:26,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (1/1) ... [2021-11-03 04:31:26,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:31:26,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:31:26,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:31:26,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:31:26,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (1/1) ... [2021-11-03 04:31:26,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (1/1) ... [2021-11-03 04:31:26,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (1/1) ... [2021-11-03 04:31:26,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (1/1) ... [2021-11-03 04:31:27,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (1/1) ... [2021-11-03 04:31:27,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (1/1) ... [2021-11-03 04:31:27,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (1/1) ... [2021-11-03 04:31:27,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:31:27,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:31:27,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:31:27,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:31:27,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (1/1) ... [2021-11-03 04:31:27,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:31:27,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:31:27,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:31:27,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:31:27,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:31:27,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:31:27,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:31:27,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:31:48,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:31:48,548 INFO L299 CfgBuilder]: Removed 1469 assume(true) statements. [2021-11-03 04:31:48,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:31:48 BoogieIcfgContainer [2021-11-03 04:31:48,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:31:48,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:31:48,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:31:48,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:31:48,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:31:24" (1/3) ... [2021-11-03 04:31:48,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e66ab19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:31:48, skipping insertion in model container [2021-11-03 04:31:48,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:26" (2/3) ... [2021-11-03 04:31:48,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e66ab19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:31:48, skipping insertion in model container [2021-11-03 04:31:48,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:31:48" (3/3) ... [2021-11-03 04:31:48,566 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2021-11-03 04:31:48,572 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:31:48,572 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:31:48,655 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:31:48,661 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 [2021-11-03 04:31:48,661 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:31:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 6752 states, 6746 states have (on average 1.898161873702935) internal successors, (12805), 6751 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:48,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:31:48,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:48,799 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] [2021-11-03 04:31:48,800 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)] === [2021-11-03 04:31:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2073803296, now seen corresponding path program 1 times [2021-11-03 04:31:48,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:48,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510058869] [2021-11-03 04:31:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:48,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:48,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:48,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:48,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:31:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:49,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:31:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:49,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:49,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:49,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510058869] [2021-11-03 04:31:49,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510058869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:49,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:49,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:31:49,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831595202] [2021-11-03 04:31:49,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:31:49,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:49,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:31:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:31:49,418 INFO L87 Difference]: Start difference. First operand has 6752 states, 6746 states have (on average 1.898161873702935) internal successors, (12805), 6751 states have internal predecessors, (12805), 0 states have call successors, (0), 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) [2021-11-03 04:31:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:49,628 INFO L93 Difference]: Finished difference Result 6771 states and 12828 transitions. [2021-11-03 04:31:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:31:49,629 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 [2021-11-03 04:31:49,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:49,706 INFO L225 Difference]: With dead ends: 6771 [2021-11-03 04:31:49,706 INFO L226 Difference]: Without dead ends: 6748 [2021-11-03 04:31:49,716 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 [2021-11-03 04:31:49,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-11-03 04:31:49,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6748. [2021-11-03 04:31:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 6743 states have (on average 1.897226753670473) internal successors, (12793), 6747 states have internal predecessors, (12793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 12793 transitions. [2021-11-03 04:31:50,036 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 12793 transitions. Word has length 27 [2021-11-03 04:31:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:50,037 INFO L470 AbstractCegarLoop]: Abstraction has 6748 states and 12793 transitions. [2021-11-03 04:31:50,037 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) [2021-11-03 04:31:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 12793 transitions. [2021-11-03 04:31:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-03 04:31:50,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:50,047 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] [2021-11-03 04:31:50,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:50,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:50,271 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)] === [2021-11-03 04:31:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash -556870769, now seen corresponding path program 1 times [2021-11-03 04:31:50,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:50,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514747207] [2021-11-03 04:31:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:50,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:50,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:50,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:50,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:31:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:50,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:31:50,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:50,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:50,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:50,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514747207] [2021-11-03 04:31:50,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514747207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:50,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:50,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:31:50,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340271478] [2021-11-03 04:31:50,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:50,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:50,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:50,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:50,984 INFO L87 Difference]: Start difference. First operand 6748 states and 12793 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) [2021-11-03 04:31:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:51,585 INFO L93 Difference]: Finished difference Result 13483 states and 25567 transitions. [2021-11-03 04:31:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:31:51,586 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 [2021-11-03 04:31:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:51,641 INFO L225 Difference]: With dead ends: 13483 [2021-11-03 04:31:51,642 INFO L226 Difference]: Without dead ends: 6748 [2021-11-03 04:31:51,656 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 [2021-11-03 04:31:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-11-03 04:31:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6748. [2021-11-03 04:31:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 6743 states have (on average 1.8963369420139404) internal successors, (12787), 6747 states have internal predecessors, (12787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 12787 transitions. [2021-11-03 04:31:51,943 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 12787 transitions. Word has length 29 [2021-11-03 04:31:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:51,944 INFO L470 AbstractCegarLoop]: Abstraction has 6748 states and 12787 transitions. [2021-11-03 04:31:51,944 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) [2021-11-03 04:31:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 12787 transitions. [2021-11-03 04:31:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 04:31:51,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:51,947 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] [2021-11-03 04:31:51,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:52,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:52,164 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)] === [2021-11-03 04:31:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:52,165 INFO L85 PathProgramCache]: Analyzing trace with hash -675317179, now seen corresponding path program 1 times [2021-11-03 04:31:52,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:52,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880764135] [2021-11-03 04:31:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:52,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:52,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:52,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:31:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:31:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:52,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:52,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:52,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880764135] [2021-11-03 04:31:52,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880764135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:52,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:52,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:31:52,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317686803] [2021-11-03 04:31:52,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:31:52,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:31:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:31:52,844 INFO L87 Difference]: Start difference. First operand 6748 states and 12787 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) [2021-11-03 04:31:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:53,465 INFO L93 Difference]: Finished difference Result 13447 states and 25490 transitions. [2021-11-03 04:31:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:31:53,466 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 [2021-11-03 04:31:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:53,510 INFO L225 Difference]: With dead ends: 13447 [2021-11-03 04:31:53,510 INFO L226 Difference]: Without dead ends: 6721 [2021-11-03 04:31:53,519 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 [2021-11-03 04:31:53,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-11-03 04:31:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6721. [2021-11-03 04:31:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6721 states, 6716 states have (on average 1.895622394282311) internal successors, (12731), 6720 states have internal predecessors, (12731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6721 states to 6721 states and 12731 transitions. [2021-11-03 04:31:53,808 INFO L78 Accepts]: Start accepts. Automaton has 6721 states and 12731 transitions. Word has length 34 [2021-11-03 04:31:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:53,809 INFO L470 AbstractCegarLoop]: Abstraction has 6721 states and 12731 transitions. [2021-11-03 04:31:53,811 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) [2021-11-03 04:31:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6721 states and 12731 transitions. [2021-11-03 04:31:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 04:31:53,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:53,813 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] [2021-11-03 04:31:53,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:54,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:54,028 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)] === [2021-11-03 04:31:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:54,031 INFO L85 PathProgramCache]: Analyzing trace with hash 365505635, now seen corresponding path program 1 times [2021-11-03 04:31:54,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:54,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378589022] [2021-11-03 04:31:54,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:54,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:54,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:54,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:54,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:31:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:54,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:31:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:54,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:54,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:54,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378589022] [2021-11-03 04:31:54,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378589022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:54,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:54,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:31:54,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104259005] [2021-11-03 04:31:54,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:54,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:54,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:54,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:54,609 INFO L87 Difference]: Start difference. First operand 6721 states and 12731 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) [2021-11-03 04:31:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:55,025 INFO L93 Difference]: Finished difference Result 13420 states and 25434 transitions. [2021-11-03 04:31:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:31:55,026 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 [2021-11-03 04:31:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:55,082 INFO L225 Difference]: With dead ends: 13420 [2021-11-03 04:31:55,082 INFO L226 Difference]: Without dead ends: 6721 [2021-11-03 04:31:55,093 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 [2021-11-03 04:31:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-11-03 04:31:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6721. [2021-11-03 04:31:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6721 states, 6716 states have (on average 1.8947290053603336) internal successors, (12725), 6720 states have internal predecessors, (12725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6721 states to 6721 states and 12725 transitions. [2021-11-03 04:31:55,463 INFO L78 Accepts]: Start accepts. Automaton has 6721 states and 12725 transitions. Word has length 35 [2021-11-03 04:31:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:55,464 INFO L470 AbstractCegarLoop]: Abstraction has 6721 states and 12725 transitions. [2021-11-03 04:31:55,464 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) [2021-11-03 04:31:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 6721 states and 12725 transitions. [2021-11-03 04:31:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:31:55,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:55,468 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] [2021-11-03 04:31:55,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:55,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:55,682 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)] === [2021-11-03 04:31:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:55,682 INFO L85 PathProgramCache]: Analyzing trace with hash 180320562, now seen corresponding path program 1 times [2021-11-03 04:31:55,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:55,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702910737] [2021-11-03 04:31:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:55,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:55,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:55,686 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:55,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:31:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:31:56,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:56,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:56,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:56,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702910737] [2021-11-03 04:31:56,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702910737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:56,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:56,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:31:56,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264319080] [2021-11-03 04:31:56,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:31:56,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:56,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:31:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:31:56,393 INFO L87 Difference]: Start difference. First operand 6721 states and 12725 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) [2021-11-03 04:31:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:56,939 INFO L93 Difference]: Finished difference Result 13414 states and 25417 transitions. [2021-11-03 04:31:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:31:56,940 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 [2021-11-03 04:31:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:57,054 INFO L225 Difference]: With dead ends: 13414 [2021-11-03 04:31:57,054 INFO L226 Difference]: Without dead ends: 6718 [2021-11-03 04:31:57,064 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 [2021-11-03 04:31:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2021-11-03 04:31:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 6718. [2021-11-03 04:31:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6718 states, 6713 states have (on average 1.8943840309846567) internal successors, (12717), 6717 states have internal predecessors, (12717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 12717 transitions. [2021-11-03 04:31:57,373 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 12717 transitions. Word has length 40 [2021-11-03 04:31:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:57,373 INFO L470 AbstractCegarLoop]: Abstraction has 6718 states and 12717 transitions. [2021-11-03 04:31:57,374 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) [2021-11-03 04:31:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 12717 transitions. [2021-11-03 04:31:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 04:31:57,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:57,377 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] [2021-11-03 04:31:57,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:57,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:57,594 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)] === [2021-11-03 04:31:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:57,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1433601694, now seen corresponding path program 1 times [2021-11-03 04:31:57,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:57,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978174213] [2021-11-03 04:31:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:57,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:57,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:57,600 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:57,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:31:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:58,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:31:58,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:58,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:58,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:58,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978174213] [2021-11-03 04:31:58,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978174213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:58,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:58,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:31:58,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292334392] [2021-11-03 04:31:58,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:58,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:58,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:58,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:58,629 INFO L87 Difference]: Start difference. First operand 6718 states and 12717 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) [2021-11-03 04:32:00,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:00,431 INFO L93 Difference]: Finished difference Result 17669 states and 33472 transitions. [2021-11-03 04:32:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:32:00,437 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 [2021-11-03 04:32:00,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:00,486 INFO L225 Difference]: With dead ends: 17669 [2021-11-03 04:32:00,487 INFO L226 Difference]: Without dead ends: 14268 [2021-11-03 04:32:00,496 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 [2021-11-03 04:32:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14268 states. [2021-11-03 04:32:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14268 to 8805. [2021-11-03 04:32:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8805 states, 8800 states have (on average 1.8945454545454545) internal successors, (16672), 8804 states have internal predecessors, (16672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8805 states to 8805 states and 16672 transitions. [2021-11-03 04:32:01,052 INFO L78 Accepts]: Start accepts. Automaton has 8805 states and 16672 transitions. Word has length 41 [2021-11-03 04:32:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:01,053 INFO L470 AbstractCegarLoop]: Abstraction has 8805 states and 16672 transitions. [2021-11-03 04:32:01,053 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) [2021-11-03 04:32:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 8805 states and 16672 transitions. [2021-11-03 04:32:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:32:01,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:01,062 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] [2021-11-03 04:32:01,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:01,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:01,281 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)] === [2021-11-03 04:32:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:01,281 INFO L85 PathProgramCache]: Analyzing trace with hash -794605999, now seen corresponding path program 1 times [2021-11-03 04:32:01,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:01,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329254448] [2021-11-03 04:32:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:01,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:01,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:01,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:01,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:32:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:01,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:32:01,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:02,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:02,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:02,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329254448] [2021-11-03 04:32:02,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329254448] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:02,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:02,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 04:32:02,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290728415] [2021-11-03 04:32:02,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:32:02,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:32:02,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:32:02,400 INFO L87 Difference]: Start difference. First operand 8805 states and 16672 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:03,546 INFO L93 Difference]: Finished difference Result 16560 states and 31134 transitions. [2021-11-03 04:32:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:32:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:32:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:03,575 INFO L225 Difference]: With dead ends: 16560 [2021-11-03 04:32:03,575 INFO L226 Difference]: Without dead ends: 8929 [2021-11-03 04:32:03,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:32:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8929 states. [2021-11-03 04:32:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8929 to 6169. [2021-11-03 04:32:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6169 states, 6164 states have (on average 1.8877352368591824) internal successors, (11636), 6168 states have internal predecessors, (11636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 11636 transitions. [2021-11-03 04:32:03,921 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 11636 transitions. Word has length 59 [2021-11-03 04:32:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:03,922 INFO L470 AbstractCegarLoop]: Abstraction has 6169 states and 11636 transitions. [2021-11-03 04:32:03,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 11636 transitions. [2021-11-03 04:32:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:32:03,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:03,927 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] [2021-11-03 04:32:03,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:04,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:04,146 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)] === [2021-11-03 04:32:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash 556602042, now seen corresponding path program 1 times [2021-11-03 04:32:04,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:04,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323441901] [2021-11-03 04:32:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:04,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:04,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:04,154 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:04,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:32:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:04,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:32:04,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:05,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:06,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:06,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323441901] [2021-11-03 04:32:06,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323441901] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:06,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:06,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:32:06,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735635715] [2021-11-03 04:32:06,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:32:06,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:32:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:32:06,535 INFO L87 Difference]: Start difference. First operand 6169 states and 11636 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:10,275 INFO L93 Difference]: Finished difference Result 19668 states and 37161 transitions. [2021-11-03 04:32:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:10,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:32:10,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:10,327 INFO L225 Difference]: With dead ends: 19668 [2021-11-03 04:32:10,327 INFO L226 Difference]: Without dead ends: 13544 [2021-11-03 04:32:10,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:32:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13544 states. [2021-11-03 04:32:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13544 to 8549. [2021-11-03 04:32:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8549 states, 8544 states have (on average 1.886938202247191) internal successors, (16122), 8548 states have internal predecessors, (16122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8549 states to 8549 states and 16122 transitions. [2021-11-03 04:32:10,768 INFO L78 Accepts]: Start accepts. Automaton has 8549 states and 16122 transitions. Word has length 60 [2021-11-03 04:32:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:10,768 INFO L470 AbstractCegarLoop]: Abstraction has 8549 states and 16122 transitions. [2021-11-03 04:32:10,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 8549 states and 16122 transitions. [2021-11-03 04:32:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:32:10,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:10,773 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] [2021-11-03 04:32:10,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:10,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:10,986 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)] === [2021-11-03 04:32:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:10,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2073570190, now seen corresponding path program 1 times [2021-11-03 04:32:10,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:10,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891473095] [2021-11-03 04:32:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:10,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:10,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:10,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:10,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:32:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:11,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:32:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:11,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:11,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:11,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891473095] [2021-11-03 04:32:11,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891473095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:11,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:11,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:32:11,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930829758] [2021-11-03 04:32:11,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:11,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:11,917 INFO L87 Difference]: Start difference. First operand 8549 states and 16122 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:18,259 INFO L93 Difference]: Finished difference Result 37218 states and 69913 transitions. [2021-11-03 04:32:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:32:18,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 [2021-11-03 04:32:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:18,326 INFO L225 Difference]: With dead ends: 37218 [2021-11-03 04:32:18,326 INFO L226 Difference]: Without dead ends: 28713 [2021-11-03 04:32:18,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:32:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28713 states. [2021-11-03 04:32:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28713 to 8563. [2021-11-03 04:32:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8563 states, 8558 states have (on average 1.8854872633792943) internal successors, (16136), 8562 states have internal predecessors, (16136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8563 states to 8563 states and 16136 transitions. [2021-11-03 04:32:19,001 INFO L78 Accepts]: Start accepts. Automaton has 8563 states and 16136 transitions. Word has length 61 [2021-11-03 04:32:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:19,002 INFO L470 AbstractCegarLoop]: Abstraction has 8563 states and 16136 transitions. [2021-11-03 04:32:19,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 8563 states and 16136 transitions. [2021-11-03 04:32:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:32:19,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:19,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:19,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:19,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:19,222 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)] === [2021-11-03 04:32:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:19,223 INFO L85 PathProgramCache]: Analyzing trace with hash -777000072, now seen corresponding path program 1 times [2021-11-03 04:32:19,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:19,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750780509] [2021-11-03 04:32:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:19,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:19,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:19,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:19,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:32:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:19,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:32:19,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:20,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:20,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:20,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750780509] [2021-11-03 04:32:20,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750780509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:20,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:20,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:32:20,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917520472] [2021-11-03 04:32:20,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:32:20,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:32:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:20,391 INFO L87 Difference]: Start difference. First operand 8563 states and 16136 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:26,990 INFO L93 Difference]: Finished difference Result 26579 states and 49821 transitions. [2021-11-03 04:32:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:32:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:27,017 INFO L225 Difference]: With dead ends: 26579 [2021-11-03 04:32:27,018 INFO L226 Difference]: Without dead ends: 18047 [2021-11-03 04:32:27,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18047 states. [2021-11-03 04:32:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18047 to 10696. [2021-11-03 04:32:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10696 states, 10691 states have (on average 1.8480965297914134) internal successors, (19758), 10695 states have internal predecessors, (19758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10696 states to 10696 states and 19758 transitions. [2021-11-03 04:32:27,745 INFO L78 Accepts]: Start accepts. Automaton has 10696 states and 19758 transitions. Word has length 62 [2021-11-03 04:32:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:27,746 INFO L470 AbstractCegarLoop]: Abstraction has 10696 states and 19758 transitions. [2021-11-03 04:32:27,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 10696 states and 19758 transitions. [2021-11-03 04:32:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:32:27,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:27,750 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] [2021-11-03 04:32:27,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:27,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:27,967 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)] === [2021-11-03 04:32:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1382135440, now seen corresponding path program 1 times [2021-11-03 04:32:27,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:27,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774227607] [2021-11-03 04:32:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:27,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:27,969 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:27,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:32:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:28,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:32:28,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:28,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:28,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:28,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774227607] [2021-11-03 04:32:28,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774227607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:28,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:28,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:32:28,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351466490] [2021-11-03 04:32:28,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:28,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:28,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:28,888 INFO L87 Difference]: Start difference. First operand 10696 states and 19758 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:32,141 INFO L93 Difference]: Finished difference Result 75288 states and 139605 transitions. [2021-11-03 04:32:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:32:32,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 04:32:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:32,236 INFO L225 Difference]: With dead ends: 75288 [2021-11-03 04:32:32,237 INFO L226 Difference]: Without dead ends: 64632 [2021-11-03 04:32:32,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:32:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64632 states. [2021-11-03 04:32:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64632 to 17002. [2021-11-03 04:32:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17002 states, 16997 states have (on average 1.849091016061658) internal successors, (31429), 17001 states have internal predecessors, (31429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17002 states to 17002 states and 31429 transitions. [2021-11-03 04:32:33,864 INFO L78 Accepts]: Start accepts. Automaton has 17002 states and 31429 transitions. Word has length 64 [2021-11-03 04:32:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:33,866 INFO L470 AbstractCegarLoop]: Abstraction has 17002 states and 31429 transitions. [2021-11-03 04:32:33,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 17002 states and 31429 transitions. [2021-11-03 04:32:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 04:32:33,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:33,870 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:33,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:34,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:34,088 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)] === [2021-11-03 04:32:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:34,088 INFO L85 PathProgramCache]: Analyzing trace with hash -385850525, now seen corresponding path program 1 times [2021-11-03 04:32:34,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:34,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881285132] [2021-11-03 04:32:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:34,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:34,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:34,090 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:34,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:32:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:34,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:32:34,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:34,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:35,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:35,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881285132] [2021-11-03 04:32:35,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881285132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:35,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:35,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:32:35,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593353013] [2021-11-03 04:32:35,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:35,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:35,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:35,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:35,028 INFO L87 Difference]: Start difference. First operand 17002 states and 31429 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:36,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:36,603 INFO L93 Difference]: Finished difference Result 44697 states and 82708 transitions. [2021-11-03 04:32:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:36,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-03 04:32:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:36,647 INFO L225 Difference]: With dead ends: 44697 [2021-11-03 04:32:36,647 INFO L226 Difference]: Without dead ends: 29527 [2021-11-03 04:32:36,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29527 states. [2021-11-03 04:32:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29527 to 29512. [2021-11-03 04:32:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29512 states, 29507 states have (on average 1.8499339139865116) internal successors, (54586), 29511 states have internal predecessors, (54586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29512 states to 29512 states and 54586 transitions. [2021-11-03 04:32:38,420 INFO L78 Accepts]: Start accepts. Automaton has 29512 states and 54586 transitions. Word has length 65 [2021-11-03 04:32:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:38,421 INFO L470 AbstractCegarLoop]: Abstraction has 29512 states and 54586 transitions. [2021-11-03 04:32:38,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 29512 states and 54586 transitions. [2021-11-03 04:32:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 04:32:38,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:38,423 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] [2021-11-03 04:32:38,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:38,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:38,643 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)] === [2021-11-03 04:32:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1747585033, now seen corresponding path program 1 times [2021-11-03 04:32:38,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:38,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764517692] [2021-11-03 04:32:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:38,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:38,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:38,658 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:38,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:32:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:39,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:32:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:39,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:39,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:39,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764517692] [2021-11-03 04:32:39,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764517692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:39,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:39,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:32:39,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055706508] [2021-11-03 04:32:39,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:39,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:39,671 INFO L87 Difference]: Start difference. First operand 29512 states and 54586 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:42,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:42,288 INFO L93 Difference]: Finished difference Result 80931 states and 149759 transitions. [2021-11-03 04:32:42,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:42,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 04:32:42,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:42,382 INFO L225 Difference]: With dead ends: 80931 [2021-11-03 04:32:42,382 INFO L226 Difference]: Without dead ends: 54368 [2021-11-03 04:32:42,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:42,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54368 states. [2021-11-03 04:32:44,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54368 to 54353. [2021-11-03 04:32:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54353 states, 54348 states have (on average 1.8499300802237433) internal successors, (100540), 54352 states have internal predecessors, (100540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54353 states to 54353 states and 100540 transitions. [2021-11-03 04:32:45,078 INFO L78 Accepts]: Start accepts. Automaton has 54353 states and 100540 transitions. Word has length 66 [2021-11-03 04:32:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:45,078 INFO L470 AbstractCegarLoop]: Abstraction has 54353 states and 100540 transitions. [2021-11-03 04:32:45,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 54353 states and 100540 transitions. [2021-11-03 04:32:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 04:32:45,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:45,081 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:45,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:45,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:45,281 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)] === [2021-11-03 04:32:45,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:45,282 INFO L85 PathProgramCache]: Analyzing trace with hash 917173288, now seen corresponding path program 1 times [2021-11-03 04:32:45,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:45,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023152942] [2021-11-03 04:32:45,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:45,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:45,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:45,284 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:45,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:32:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:45,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:32:45,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:46,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:46,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:46,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023152942] [2021-11-03 04:32:46,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023152942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:46,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:46,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:32:46,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968842949] [2021-11-03 04:32:46,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:46,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:46,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:46,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:46,368 INFO L87 Difference]: Start difference. First operand 54353 states and 100540 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:51,400 INFO L93 Difference]: Finished difference Result 153041 states and 283074 transitions. [2021-11-03 04:32:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 04:32:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:51,631 INFO L225 Difference]: With dead ends: 153041 [2021-11-03 04:32:51,631 INFO L226 Difference]: Without dead ends: 103645 [2021-11-03 04:32:51,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103645 states. [2021-11-03 04:32:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103645 to 103630. [2021-11-03 04:32:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103630 states, 103625 states have (on average 1.8488588661037395) internal successors, (191588), 103629 states have internal predecessors, (191588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103630 states to 103630 states and 191588 transitions. [2021-11-03 04:32:57,438 INFO L78 Accepts]: Start accepts. Automaton has 103630 states and 191588 transitions. Word has length 67 [2021-11-03 04:32:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:57,439 INFO L470 AbstractCegarLoop]: Abstraction has 103630 states and 191588 transitions. [2021-11-03 04:32:57,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 103630 states and 191588 transitions. [2021-11-03 04:32:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:32:57,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:57,441 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:57,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:57,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:57,642 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)] === [2021-11-03 04:32:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash -445809572, now seen corresponding path program 1 times [2021-11-03 04:32:57,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:57,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551143064] [2021-11-03 04:32:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:57,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:57,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:57,646 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:57,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:32:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:32:58,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:58,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:58,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:58,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551143064] [2021-11-03 04:32:58,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551143064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:58,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:58,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:32:58,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62254857] [2021-11-03 04:32:58,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:58,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:58,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:58,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:58,859 INFO L87 Difference]: Start difference. First operand 103630 states and 191588 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:09,254 INFO L93 Difference]: Finished difference Result 296451 states and 547851 transitions. [2021-11-03 04:33:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:33:09,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:33:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:09,717 INFO L225 Difference]: With dead ends: 296451 [2021-11-03 04:33:09,717 INFO L226 Difference]: Without dead ends: 201342 [2021-11-03 04:33:09,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:33:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201342 states. [2021-11-03 04:33:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201342 to 201327. [2021-11-03 04:33:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201327 states, 201322 states have (on average 1.8469119122599618) internal successors, (371824), 201326 states have internal predecessors, (371824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201327 states to 201327 states and 371824 transitions. [2021-11-03 04:33:21,143 INFO L78 Accepts]: Start accepts. Automaton has 201327 states and 371824 transitions. Word has length 68 [2021-11-03 04:33:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:21,144 INFO L470 AbstractCegarLoop]: Abstraction has 201327 states and 371824 transitions. [2021-11-03 04:33:21,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand 201327 states and 371824 transitions. [2021-11-03 04:33:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:33:21,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:21,147 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:21,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 04:33:21,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:21,385 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)] === [2021-11-03 04:33:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2043719390, now seen corresponding path program 1 times [2021-11-03 04:33:21,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:21,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61142836] [2021-11-03 04:33:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:21,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:21,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:21,388 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:21,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:33:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:33:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:22,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:22,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:22,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61142836] [2021-11-03 04:33:22,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61142836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:22,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:22,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:33:22,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214938456] [2021-11-03 04:33:22,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:33:22,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:22,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:33:22,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:33:22,595 INFO L87 Difference]: Start difference. First operand 201327 states and 371824 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:52,758 INFO L93 Difference]: Finished difference Result 789415 states and 1466969 transitions. [2021-11-03 04:33:52,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:33:52,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:33:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:54,923 INFO L225 Difference]: With dead ends: 789415 [2021-11-03 04:33:54,923 INFO L226 Difference]: Without dead ends: 648381 [2021-11-03 04:33:55,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:33:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648381 states. [2021-11-03 04:34:17,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648381 to 323595. [2021-11-03 04:34:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323595 states, 323590 states have (on average 1.8470997249605983) internal successors, (597703), 323594 states have internal predecessors, (597703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323595 states to 323595 states and 597703 transitions. [2021-11-03 04:34:19,884 INFO L78 Accepts]: Start accepts. Automaton has 323595 states and 597703 transitions. Word has length 68 [2021-11-03 04:34:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:19,884 INFO L470 AbstractCegarLoop]: Abstraction has 323595 states and 597703 transitions. [2021-11-03 04:34:19,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 323595 states and 597703 transitions. [2021-11-03 04:34:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 04:34:19,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:19,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:19,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:20,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:20,137 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)] === [2021-11-03 04:34:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1025968336, now seen corresponding path program 1 times [2021-11-03 04:34:20,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:20,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744559593] [2021-11-03 04:34:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:20,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:20,143 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:20,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:34:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:21,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:34:21,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:21,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:21,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:21,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744559593] [2021-11-03 04:34:21,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744559593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:21,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:21,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:34:21,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796296708] [2021-11-03 04:34:21,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:34:21,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:21,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:34:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:34:21,678 INFO L87 Difference]: Start difference. First operand 323595 states and 597703 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:42,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:42,813 INFO L93 Difference]: Finished difference Result 1706143 states and 3173696 transitions. [2021-11-03 04:35:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:35:42,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 04:35:42,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:47,897 INFO L225 Difference]: With dead ends: 1706143 [2021-11-03 04:35:47,898 INFO L226 Difference]: Without dead ends: 1442841 [2021-11-03 04:35:48,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:35:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442841 states. [2021-11-03 04:36:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442841 to 502054. [2021-11-03 04:36:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502054 states, 502049 states have (on average 1.8531816615509642) internal successors, (930388), 502053 states have internal predecessors, (930388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502054 states to 502054 states and 930388 transitions. [2021-11-03 04:36:35,789 INFO L78 Accepts]: Start accepts. Automaton has 502054 states and 930388 transitions. Word has length 70 [2021-11-03 04:36:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:35,789 INFO L470 AbstractCegarLoop]: Abstraction has 502054 states and 930388 transitions. [2021-11-03 04:36:35,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:35,789 INFO L276 IsEmpty]: Start isEmpty. Operand 502054 states and 930388 transitions. [2021-11-03 04:36:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 04:36:35,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:35,795 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:35,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:36,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:36:36,003 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:36:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:36,003 INFO L85 PathProgramCache]: Analyzing trace with hash -618357210, now seen corresponding path program 1 times [2021-11-03 04:36:36,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:36,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451708962] [2021-11-03 04:36:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:36,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:36,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:36,005 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:36,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:36:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:36:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:37,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:37,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:37,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451708962] [2021-11-03 04:36:37,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451708962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:37,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:37,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:36:37,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248840464] [2021-11-03 04:36:37,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:36:37,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:36:37,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:36:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:36:37,347 INFO L87 Difference]: Start difference. First operand 502054 states and 930388 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:38:03,309 INFO L93 Difference]: Finished difference Result 1801187 states and 3340366 transitions. [2021-11-03 04:38:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:38:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-03 04:38:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:38:07,746 INFO L225 Difference]: With dead ends: 1801187 [2021-11-03 04:38:07,746 INFO L226 Difference]: Without dead ends: 1313908 [2021-11-03 04:38:08,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:38:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313908 states. [2021-11-03 04:38:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313908 to 495397. [2021-11-03 04:38:50,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495397 states, 495392 states have (on average 1.8301728731994058) internal successors, (906653), 495396 states have internal predecessors, (906653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495397 states to 495397 states and 906653 transitions. [2021-11-03 04:38:52,911 INFO L78 Accepts]: Start accepts. Automaton has 495397 states and 906653 transitions. Word has length 77 [2021-11-03 04:38:52,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:38:52,914 INFO L470 AbstractCegarLoop]: Abstraction has 495397 states and 906653 transitions. [2021-11-03 04:38:52,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:52,915 INFO L276 IsEmpty]: Start isEmpty. Operand 495397 states and 906653 transitions. [2021-11-03 04:38:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:38:52,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:38:52,920 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:38:52,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:53,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:38:53,126 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:38:53,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:38:53,128 INFO L85 PathProgramCache]: Analyzing trace with hash -333000139, now seen corresponding path program 1 times [2021-11-03 04:38:53,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:38:53,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389337275] [2021-11-03 04:38:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:53,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:38:53,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:38:53,131 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:38:53,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:38:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:54,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:38:54,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:38:54,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:38:54,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:38:54,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389337275] [2021-11-03 04:38:54,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389337275] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:38:54,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:38:54,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:38:54,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180872428] [2021-11-03 04:38:54,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:38:54,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:38:54,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:38:54,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:38:54,804 INFO L87 Difference]: Start difference. First operand 495397 states and 906653 transitions. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:21,651 INFO L93 Difference]: Finished difference Result 3406741 states and 6202949 transitions. [2021-11-03 04:42:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 04:42:21,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-03 04:42:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:31,021 INFO L225 Difference]: With dead ends: 3406741 [2021-11-03 04:42:31,021 INFO L226 Difference]: Without dead ends: 2926043 [2021-11-03 04:42:32,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:42:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926043 states. [2021-11-03 04:44:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926043 to 1130073. [2021-11-03 04:44:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130073 states, 1130068 states have (on average 1.8221071652325347) internal successors, (2059105), 1130072 states have internal predecessors, (2059105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130073 states to 1130073 states and 2059105 transitions. [2021-11-03 04:44:21,822 INFO L78 Accepts]: Start accepts. Automaton has 1130073 states and 2059105 transitions. Word has length 78 [2021-11-03 04:44:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:21,823 INFO L470 AbstractCegarLoop]: Abstraction has 1130073 states and 2059105 transitions. [2021-11-03 04:44:21,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1130073 states and 2059105 transitions. [2021-11-03 04:44:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:44:21,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:21,826 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:21,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:22,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:22,030 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:44:22,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2122907981, now seen corresponding path program 1 times [2021-11-03 04:44:22,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:22,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754400306] [2021-11-03 04:44:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:22,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:22,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:22,032 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:22,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e13314a9-52d5-43d4-ada0-efc1845442ef/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:44:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:23,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:44:23,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:44:24,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:44:24,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:24,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754400306] [2021-11-03 04:44:24,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754400306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:24,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:24,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:44:24,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023031996] [2021-11-03 04:44:24,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:44:24,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:24,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:44:24,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:44:24,382 INFO L87 Difference]: Start difference. First operand 1130073 states and 2059105 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:46:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:46:38,171 INFO L93 Difference]: Finished difference Result 3354994 states and 6114901 transitions. [2021-11-03 04:46:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:46:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-03 04:46:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted.