./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:57:01,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:57:01,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:57:01,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:57:01,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:57:01,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:57:01,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:57:01,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:57:01,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:57:01,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:57:01,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:57:01,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:57:01,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:57:01,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:57:01,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:57:01,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:57:01,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:57:01,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:57:01,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:57:01,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:57:01,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:57:01,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:57:01,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:57:01,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:57:01,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:57:01,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:57:01,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:57:01,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:57:01,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:57:01,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:57:01,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:57:01,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:57:01,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:57:01,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:57:01,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:57:01,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:57:01,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:57:01,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:57:01,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:57:01,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:57:01,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:57:01,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 00:57:01,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:57:01,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:57:01,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:57:01,337 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:57:01,337 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:57:01,338 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:57:01,338 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:57:01,338 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:57:01,344 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:57:01,344 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:57:01,345 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:57:01,346 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:57:01,346 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:57:01,346 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:57:01,346 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:57:01,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:57:01,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:57:01,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:57:01,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:57:01,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:57:01,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:57:01,348 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:57:01,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:57:01,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:57:01,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:57:01,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:57:01,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:57:01,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:57:01,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:57:01,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:57:01,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:57:01,352 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:57:01,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:57:01,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:57:01,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:57:01,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:57:01,353 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_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 [2021-11-07 00:57:01,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:57:01,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:57:01,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:57:01,680 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:57:01,681 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:57:01,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2021-11-07 00:57:01,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/data/1b09f120a/93255a9fad5641e9b30e9b856041016a/FLAG6619259fb [2021-11-07 00:57:02,449 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:57:02,450 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2021-11-07 00:57:02,480 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/data/1b09f120a/93255a9fad5641e9b30e9b856041016a/FLAG6619259fb [2021-11-07 00:57:02,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/data/1b09f120a/93255a9fad5641e9b30e9b856041016a [2021-11-07 00:57:02,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:57:02,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:57:02,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:02,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:57:02,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:57:02,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:02" (1/1) ... [2021-11-07 00:57:02,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301a445d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:02, skipping insertion in model container [2021-11-07 00:57:02,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:02" (1/1) ... [2021-11-07 00:57:02,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:57:02,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:57:03,585 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_c251c152-d107-430e-a9e3-d8ea2d5bfb93/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2021-11-07 00:57:03,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:03,629 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 00:57:03,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@615dd63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:03, skipping insertion in model container [2021-11-07 00:57:03,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:03,630 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:57:03,632 INFO L168 Benchmark]: Toolchain (without parser) took 1024.22 ms. Allocated memory is still 130.0 MB. Free memory was 89.1 MB in the beginning and 80.6 MB in the end (delta: 8.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2021-11-07 00:57:03,633 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 130.0 MB. Free memory is still 111.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:57:03,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1019.84 ms. Allocated memory is still 130.0 MB. Free memory was 88.7 MB in the beginning and 80.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2021-11-07 00:57:03,636 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 130.0 MB. Free memory is still 111.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1019.84 ms. Allocated memory is still 130.0 MB. Free memory was 88.7 MB in the beginning and 80.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4129]: 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_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:57:05,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:57:05,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:57:05,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:57:05,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:57:05,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:57:05,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:57:05,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:57:05,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:57:05,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:57:05,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:57:05,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:57:05,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:57:05,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:57:05,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:57:05,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:57:05,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:57:05,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:57:05,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:57:05,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:57:05,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:57:05,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:57:05,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:57:05,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:57:05,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:57:05,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:57:05,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:57:05,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:57:05,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:57:05,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:57:05,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:57:05,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:57:05,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:57:05,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:57:05,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:57:05,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:57:05,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:57:05,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:57:05,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:57:05,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:57:05,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:57:05,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 00:57:06,033 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:57:06,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:57:06,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:57:06,035 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:57:06,036 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:57:06,036 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:57:06,036 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:57:06,036 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:57:06,037 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:57:06,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:57:06,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:57:06,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:57:06,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:57:06,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:57:06,041 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:57:06,041 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:57:06,041 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:57:06,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:57:06,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:57:06,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:57:06,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:57:06,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:57:06,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:57:06,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:57:06,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:57:06,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:57:06,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:57:06,044 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:57:06,045 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:06,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:57:06,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:57:06,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:57:06,046 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_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 [2021-11-07 00:57:06,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:57:06,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:57:06,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:57:06,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:57:06,468 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:57:06,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2021-11-07 00:57:06,542 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/data/84e3e3aeb/571f5cccbf5645e4a4a45d354ba8e233/FLAGbc88a9aa6 [2021-11-07 00:57:07,319 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:57:07,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2021-11-07 00:57:07,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/data/84e3e3aeb/571f5cccbf5645e4a4a45d354ba8e233/FLAGbc88a9aa6 [2021-11-07 00:57:07,414 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/data/84e3e3aeb/571f5cccbf5645e4a4a45d354ba8e233 [2021-11-07 00:57:07,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:57:07,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:57:07,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:07,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:57:07,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:57:07,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:07" (1/1) ... [2021-11-07 00:57:07,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad35a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:07, skipping insertion in model container [2021-11-07 00:57:07,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:57:07" (1/1) ... [2021-11-07 00:57:07,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:57:07,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:57:08,431 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_c251c152-d107-430e-a9e3-d8ea2d5bfb93/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2021-11-07 00:57:08,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:08,534 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:57:08,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:57:08,763 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_c251c152-d107-430e-a9e3-d8ea2d5bfb93/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2021-11-07 00:57:08,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:08,786 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:57:08,947 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_c251c152-d107-430e-a9e3-d8ea2d5bfb93/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2021-11-07 00:57:08,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:57:09,039 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:57:09,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09 WrapperNode [2021-11-07 00:57:09,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:57:09,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:57:09,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:57:09,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:57:09,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (1/1) ... [2021-11-07 00:57:09,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (1/1) ... [2021-11-07 00:57:09,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:57:09,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:57:09,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:57:09,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:57:09,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (1/1) ... [2021-11-07 00:57:09,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (1/1) ... [2021-11-07 00:57:09,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (1/1) ... [2021-11-07 00:57:09,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (1/1) ... [2021-11-07 00:57:09,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (1/1) ... [2021-11-07 00:57:09,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (1/1) ... [2021-11-07 00:57:09,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (1/1) ... [2021-11-07 00:57:09,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:57:09,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:57:09,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:57:09,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:57:09,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (1/1) ... [2021-11-07 00:57:09,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:57:09,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:57:09,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:57:09,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:57:09,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 00:57:09,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 00:57:09,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 00:57:09,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 00:57:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 00:57:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 00:57:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:57:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 00:57:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 00:57:09,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 00:57:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 00:57:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 00:57:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 00:57:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:57:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 00:57:09,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 00:57:09,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:57:09,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:57:16,152 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:57:16,152 INFO L299 CfgBuilder]: Removed 1215 assume(true) statements. [2021-11-07 00:57:16,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:57:16 BoogieIcfgContainer [2021-11-07 00:57:16,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:57:16,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:57:16,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:57:16,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:57:16,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:57:07" (1/3) ... [2021-11-07 00:57:16,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d88193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:57:16, skipping insertion in model container [2021-11-07 00:57:16,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:57:09" (2/3) ... [2021-11-07 00:57:16,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d88193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:57:16, skipping insertion in model container [2021-11-07 00:57:16,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:57:16" (3/3) ... [2021-11-07 00:57:16,163 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2021-11-07 00:57:16,168 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:57:16,169 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 00:57:16,220 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:57:16,226 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 00:57:16,226 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 00:57:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 784 states, 782 states have (on average 1.326086956521739) internal successors, (1037), 783 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 00:57:16,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:16,269 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:16,270 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:16,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:16,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1882859951, now seen corresponding path program 1 times [2021-11-07 00:57:16,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:16,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385792772] [2021-11-07 00:57:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:16,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:16,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:16,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:16,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:57:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:16,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 00:57:16,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:17,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:17,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:17,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385792772] [2021-11-07 00:57:17,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385792772] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:17,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:17,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 00:57:17,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108931209] [2021-11-07 00:57:17,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 00:57:17,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 00:57:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:57:17,345 INFO L87 Difference]: Start difference. First operand has 784 states, 782 states have (on average 1.326086956521739) internal successors, (1037), 783 states have internal predecessors, (1037), 0 states have call successors, (0), 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 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:17,445 INFO L93 Difference]: Finished difference Result 1564 states and 2069 transitions. [2021-11-07 00:57:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 00:57:17,447 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 00:57:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:17,473 INFO L225 Difference]: With dead ends: 1564 [2021-11-07 00:57:17,473 INFO L226 Difference]: Without dead ends: 776 [2021-11-07 00:57:17,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 00:57:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-11-07 00:57:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2021-11-07 00:57:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 1.2916129032258064) internal successors, (1001), 775 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1001 transitions. [2021-11-07 00:57:17,594 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1001 transitions. Word has length 55 [2021-11-07 00:57:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:17,594 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1001 transitions. [2021-11-07 00:57:17,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1001 transitions. [2021-11-07 00:57:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 00:57:17,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:17,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:17,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:17,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:17,843 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1826553015, now seen corresponding path program 1 times [2021-11-07 00:57:17,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:17,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436850798] [2021-11-07 00:57:17,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:17,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:17,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:17,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:17,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:57:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:57:18,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:18,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:57:18,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:18,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436850798] [2021-11-07 00:57:18,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436850798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:18,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:18,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:57:18,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447252021] [2021-11-07 00:57:18,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:57:18,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:57:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:57:18,874 INFO L87 Difference]: Start difference. First operand 776 states and 1001 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:19,147 INFO L93 Difference]: Finished difference Result 1542 states and 2001 transitions. [2021-11-07 00:57:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:57:19,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 00:57:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:19,154 INFO L225 Difference]: With dead ends: 1542 [2021-11-07 00:57:19,155 INFO L226 Difference]: Without dead ends: 786 [2021-11-07 00:57:19,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:57:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-11-07 00:57:19,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2021-11-07 00:57:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 1.2878980891719745) internal successors, (1011), 785 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1011 transitions. [2021-11-07 00:57:19,194 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1011 transitions. Word has length 55 [2021-11-07 00:57:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:19,194 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1011 transitions. [2021-11-07 00:57:19,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1011 transitions. [2021-11-07 00:57:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 00:57:19,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:19,199 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:19,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:19,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:19,422 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1616944375, now seen corresponding path program 1 times [2021-11-07 00:57:19,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:19,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547509004] [2021-11-07 00:57:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:19,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:19,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:19,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:19,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:57:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:20,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 00:57:20,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 00:57:20,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:20,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547509004] [2021-11-07 00:57:20,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547509004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:20,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [68797645] [2021-11-07 00:57:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:20,793 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:20,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:20,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:20,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 00:57:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:57:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 00:57:21,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 00:57:21,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [68797645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:21,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:21,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 00:57:21,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859475043] [2021-11-07 00:57:21,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:57:21,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:21,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:57:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:21,805 INFO L87 Difference]: Start difference. First operand 786 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2021-11-07 00:57:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:21,940 INFO L93 Difference]: Finished difference Result 793 states and 1017 transitions. [2021-11-07 00:57:21,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:57:21,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 65 [2021-11-07 00:57:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:21,950 INFO L225 Difference]: With dead ends: 793 [2021-11-07 00:57:21,950 INFO L226 Difference]: Without dead ends: 790 [2021-11-07 00:57:21,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-11-07 00:57:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 787. [2021-11-07 00:57:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 1.2875318066157762) internal successors, (1012), 786 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1012 transitions. [2021-11-07 00:57:21,996 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1012 transitions. Word has length 65 [2021-11-07 00:57:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:21,997 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1012 transitions. [2021-11-07 00:57:21,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2021-11-07 00:57:21,998 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1012 transitions. [2021-11-07 00:57:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 00:57:21,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:21,999 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:22,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:22,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:22,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:22,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:22,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:22,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1616884793, now seen corresponding path program 1 times [2021-11-07 00:57:22,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:22,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796220718] [2021-11-07 00:57:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:22,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:22,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:22,408 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:22,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:57:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:23,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:23,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 00:57:23,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 00:57:23,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:23,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796220718] [2021-11-07 00:57:23,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796220718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:23,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1094898559] [2021-11-07 00:57:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:23,732 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:23,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:23,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:23,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 00:57:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:24,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:57:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 00:57:24,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 00:57:25,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1094898559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:25,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:25,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 00:57:25,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825629303] [2021-11-07 00:57:25,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:57:25,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:25,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:57:25,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:25,023 INFO L87 Difference]: Start difference. First operand 787 states and 1012 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 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) [2021-11-07 00:57:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:25,120 INFO L93 Difference]: Finished difference Result 1527 states and 1971 transitions. [2021-11-07 00:57:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:57:25,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 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 65 [2021-11-07 00:57:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:25,131 INFO L225 Difference]: With dead ends: 1527 [2021-11-07 00:57:25,131 INFO L226 Difference]: Without dead ends: 1480 [2021-11-07 00:57:25,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-11-07 00:57:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1479. [2021-11-07 00:57:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1478 states have (on average 1.2949932341001353) internal successors, (1914), 1478 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 1914 transitions. [2021-11-07 00:57:25,217 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 1914 transitions. Word has length 65 [2021-11-07 00:57:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:25,219 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 1914 transitions. [2021-11-07 00:57:25,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 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) [2021-11-07 00:57:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 1914 transitions. [2021-11-07 00:57:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 00:57:25,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:25,224 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:25,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:25,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:25,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:25,629 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:25,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:25,629 INFO L85 PathProgramCache]: Analyzing trace with hash -900805458, now seen corresponding path program 1 times [2021-11-07 00:57:25,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:25,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877177692] [2021-11-07 00:57:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:25,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:25,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:25,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:25,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:57:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:26,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:26,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 00:57:26,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 00:57:27,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:27,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877177692] [2021-11-07 00:57:27,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877177692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:27,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1444291840] [2021-11-07 00:57:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:27,197 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:27,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:27,198 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:27,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 00:57:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:27,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:57:27,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 00:57:28,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 00:57:28,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1444291840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:28,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:28,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 00:57:28,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659721917] [2021-11-07 00:57:28,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:57:28,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:28,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:57:28,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:28,437 INFO L87 Difference]: Start difference. First operand 1479 states and 1914 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:28,716 INFO L93 Difference]: Finished difference Result 3328 states and 4303 transitions. [2021-11-07 00:57:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:57:28,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 96 [2021-11-07 00:57:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:28,729 INFO L225 Difference]: With dead ends: 3328 [2021-11-07 00:57:28,729 INFO L226 Difference]: Without dead ends: 1896 [2021-11-07 00:57:28,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:28,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-11-07 00:57:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1854. [2021-11-07 00:57:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 1.2914193200215867) internal successors, (2393), 1853 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2393 transitions. [2021-11-07 00:57:28,867 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2393 transitions. Word has length 96 [2021-11-07 00:57:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:28,867 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 2393 transitions. [2021-11-07 00:57:28,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:28,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2393 transitions. [2021-11-07 00:57:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-07 00:57:28,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:28,883 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:28,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:29,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:29,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:29,293 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:29,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1165047788, now seen corresponding path program 1 times [2021-11-07 00:57:29,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:29,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867180723] [2021-11-07 00:57:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:29,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:29,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:29,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:29,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:57:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:30,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:57:30,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:57:31,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:31,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867180723] [2021-11-07 00:57:31,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867180723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:31,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [205766238] [2021-11-07 00:57:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:31,370 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:31,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:31,371 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:31,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 00:57:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:57:32,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 00:57:32,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 00:57:33,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [205766238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:33,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:33,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 00:57:33,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641775134] [2021-11-07 00:57:33,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:57:33,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:57:33,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:33,545 INFO L87 Difference]: Start difference. First operand 1854 states and 2393 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:33,654 INFO L93 Difference]: Finished difference Result 3661 states and 4733 transitions. [2021-11-07 00:57:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:57:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 161 [2021-11-07 00:57:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:33,668 INFO L225 Difference]: With dead ends: 3661 [2021-11-07 00:57:33,668 INFO L226 Difference]: Without dead ends: 1854 [2021-11-07 00:57:33,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-11-07 00:57:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1854. [2021-11-07 00:57:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 1.2892606583917972) internal successors, (2389), 1853 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2389 transitions. [2021-11-07 00:57:33,793 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2389 transitions. Word has length 161 [2021-11-07 00:57:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:33,794 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 2389 transitions. [2021-11-07 00:57:33,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2389 transitions. [2021-11-07 00:57:33,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-07 00:57:33,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:33,808 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:33,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:34,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:34,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:34,222 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1693599655, now seen corresponding path program 1 times [2021-11-07 00:57:34,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:34,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304301507] [2021-11-07 00:57:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:34,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:34,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:34,225 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:34,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:57:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:35,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:35,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:57:35,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:57:36,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:36,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304301507] [2021-11-07 00:57:36,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304301507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:36,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1766993736] [2021-11-07 00:57:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:36,632 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:36,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:36,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:36,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 00:57:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:57:37,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:57:38,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:57:38,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1766993736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:38,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:38,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 00:57:38,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753653772] [2021-11-07 00:57:38,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:57:38,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:38,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:57:38,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:57:38,949 INFO L87 Difference]: Start difference. First operand 1854 states and 2389 transitions. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:39,072 INFO L93 Difference]: Finished difference Result 3661 states and 4725 transitions. [2021-11-07 00:57:39,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:57:39,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 163 [2021-11-07 00:57:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:39,086 INFO L225 Difference]: With dead ends: 3661 [2021-11-07 00:57:39,086 INFO L226 Difference]: Without dead ends: 1854 [2021-11-07 00:57:39,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:57:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-11-07 00:57:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1854. [2021-11-07 00:57:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 1.2881813275769023) internal successors, (2387), 1853 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2387 transitions. [2021-11-07 00:57:39,223 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2387 transitions. Word has length 163 [2021-11-07 00:57:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:39,224 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 2387 transitions. [2021-11-07 00:57:39,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2387 transitions. [2021-11-07 00:57:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 00:57:39,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:39,230 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:39,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:39,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:39,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:39,646 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:39,646 INFO L85 PathProgramCache]: Analyzing trace with hash -380523627, now seen corresponding path program 1 times [2021-11-07 00:57:39,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:39,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284078555] [2021-11-07 00:57:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:39,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:39,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:39,648 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:39,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:57:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:40,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:57:41,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:57:42,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:42,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284078555] [2021-11-07 00:57:42,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284078555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:42,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [923733612] [2021-11-07 00:57:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:42,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:42,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:42,073 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:42,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 00:57:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:43,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:57:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 00:57:43,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 00:57:44,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [923733612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:44,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:44,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 00:57:44,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840185200] [2021-11-07 00:57:44,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:57:44,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:44,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:57:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 00:57:44,252 INFO L87 Difference]: Start difference. First operand 1854 states and 2387 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:46,013 INFO L93 Difference]: Finished difference Result 8880 states and 11703 transitions. [2021-11-07 00:57:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:57:46,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 0 states have call successors, (0), 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 165 [2021-11-07 00:57:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:46,062 INFO L225 Difference]: With dead ends: 8880 [2021-11-07 00:57:46,062 INFO L226 Difference]: Without dead ends: 7073 [2021-11-07 00:57:46,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-07 00:57:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2021-11-07 00:57:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 1870. [2021-11-07 00:57:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.2857142857142858) internal successors, (2403), 1869 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2403 transitions. [2021-11-07 00:57:46,311 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2403 transitions. Word has length 165 [2021-11-07 00:57:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:46,312 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2403 transitions. [2021-11-07 00:57:46,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2403 transitions. [2021-11-07 00:57:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-07 00:57:46,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:46,318 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:46,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:46,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-07 00:57:46,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:46,743 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1831272491, now seen corresponding path program 1 times [2021-11-07 00:57:46,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:46,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019538946] [2021-11-07 00:57:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:46,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:46,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:46,746 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:46,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:57:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:48,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:48,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:57:48,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:57:49,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:49,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019538946] [2021-11-07 00:57:49,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019538946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:49,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1050018342] [2021-11-07 00:57:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:49,489 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:49,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:49,494 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:49,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 00:57:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:51,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:57:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 00:57:51,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 00:57:52,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1050018342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:52,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:52,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 11 [2021-11-07 00:57:52,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181135921] [2021-11-07 00:57:52,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:57:52,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:57:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:57:52,319 INFO L87 Difference]: Start difference. First operand 1870 states and 2403 transitions. Second operand has 5 states, 5 states have (on average 41.2) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:52,984 INFO L93 Difference]: Finished difference Result 6791 states and 8749 transitions. [2021-11-07 00:57:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:57:52,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 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 173 [2021-11-07 00:57:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:53,014 INFO L225 Difference]: With dead ends: 6791 [2021-11-07 00:57:53,015 INFO L226 Difference]: Without dead ends: 4968 [2021-11-07 00:57:53,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:57:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4968 states. [2021-11-07 00:57:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4968 to 2150. [2021-11-07 00:57:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 1.273615635179153) internal successors, (2737), 2149 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 2737 transitions. [2021-11-07 00:57:53,286 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 2737 transitions. Word has length 173 [2021-11-07 00:57:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:53,287 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 2737 transitions. [2021-11-07 00:57:53,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 4 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 2737 transitions. [2021-11-07 00:57:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 00:57:53,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:53,292 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:53,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:53,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 00:57:53,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:53,712 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash 931235246, now seen corresponding path program 1 times [2021-11-07 00:57:53,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:53,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781676418] [2021-11-07 00:57:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:53,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:53,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:53,715 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:53,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 00:57:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:55,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:57:55,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:57:55,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:57:56,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:56,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781676418] [2021-11-07 00:57:56,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781676418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:57:56,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [322840775] [2021-11-07 00:57:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:56,399 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:57:56,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:57:56,400 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:57:56,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 00:57:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:58,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:57:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 00:57:58,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 00:57:59,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [322840775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:59,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:57:59,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 00:57:59,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639324772] [2021-11-07 00:57:59,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:57:59,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:59,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:57:59,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:59,435 INFO L87 Difference]: Start difference. First operand 2150 states and 2737 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:59,816 INFO L93 Difference]: Finished difference Result 5500 states and 7075 transitions. [2021-11-07 00:57:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:57:59,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 186 [2021-11-07 00:57:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:59,839 INFO L225 Difference]: With dead ends: 5500 [2021-11-07 00:57:59,839 INFO L226 Difference]: Without dead ends: 3397 [2021-11-07 00:57:59,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:57:59,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2021-11-07 00:58:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 2186. [2021-11-07 00:58:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 1.2672768878718534) internal successors, (2769), 2185 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 2769 transitions. [2021-11-07 00:58:00,096 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 2769 transitions. Word has length 186 [2021-11-07 00:58:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:00,096 INFO L470 AbstractCegarLoop]: Abstraction has 2186 states and 2769 transitions. [2021-11-07 00:58:00,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 2769 transitions. [2021-11-07 00:58:00,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 00:58:00,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:00,102 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:00,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:00,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:00,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:00,522 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:00,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:00,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1496643342, now seen corresponding path program 1 times [2021-11-07 00:58:00,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:00,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613607269] [2021-11-07 00:58:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:00,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:00,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:00,525 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:00,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 00:58:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:02,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:58:02,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:58:02,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:58:03,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:03,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613607269] [2021-11-07 00:58:03,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613607269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:03,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2103335391] [2021-11-07 00:58:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:03,595 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:03,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:03,596 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:03,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 00:58:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:05,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:58:05,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:58:06,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:58:06,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2103335391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:06,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:06,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 00:58:06,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248905830] [2021-11-07 00:58:06,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:58:06,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:58:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:06,459 INFO L87 Difference]: Start difference. First operand 2186 states and 2769 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:09,116 INFO L93 Difference]: Finished difference Result 6627 states and 8535 transitions. [2021-11-07 00:58:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:58:09,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 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 186 [2021-11-07 00:58:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:09,145 INFO L225 Difference]: With dead ends: 6627 [2021-11-07 00:58:09,145 INFO L226 Difference]: Without dead ends: 4391 [2021-11-07 00:58:09,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2021-11-07 00:58:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 4391. [2021-11-07 00:58:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4391 states, 4390 states have (on average 1.2933940774487471) internal successors, (5678), 4390 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:09,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4391 states to 4391 states and 5678 transitions. [2021-11-07 00:58:09,754 INFO L78 Accepts]: Start accepts. Automaton has 4391 states and 5678 transitions. Word has length 186 [2021-11-07 00:58:09,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:09,754 INFO L470 AbstractCegarLoop]: Abstraction has 4391 states and 5678 transitions. [2021-11-07 00:58:09,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4391 states and 5678 transitions. [2021-11-07 00:58:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 00:58:09,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:09,798 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:09,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:10,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-07 00:58:10,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:10,208 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:10,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:10,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1052742668, now seen corresponding path program 1 times [2021-11-07 00:58:10,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:10,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457398369] [2021-11-07 00:58:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:10,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:10,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:10,211 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:10,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 00:58:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:58:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:58:12,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 00:58:13,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:13,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457398369] [2021-11-07 00:58:13,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457398369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:13,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [152326140] [2021-11-07 00:58:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:13,438 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:13,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:13,439 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:13,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 00:58:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:15,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:58:15,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:58:16,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:58:16,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [152326140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:16,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:16,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 00:58:16,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152415680] [2021-11-07 00:58:16,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:58:16,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:16,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:58:16,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:58:16,550 INFO L87 Difference]: Start difference. First operand 4391 states and 5678 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:18,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:18,806 INFO L93 Difference]: Finished difference Result 5874 states and 7588 transitions. [2021-11-07 00:58:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:58:18,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 186 [2021-11-07 00:58:18,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:18,812 INFO L225 Difference]: With dead ends: 5874 [2021-11-07 00:58:18,812 INFO L226 Difference]: Without dead ends: 1488 [2021-11-07 00:58:18,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:58:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-11-07 00:58:19,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1486. [2021-11-07 00:58:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 1.2781144781144782) internal successors, (1898), 1485 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 1898 transitions. [2021-11-07 00:58:19,016 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 1898 transitions. Word has length 186 [2021-11-07 00:58:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:19,017 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 1898 transitions. [2021-11-07 00:58:19,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 1898 transitions. [2021-11-07 00:58:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-07 00:58:19,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:19,022 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:19,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:19,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-07 00:58:19,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:19,447 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1225549921, now seen corresponding path program 1 times [2021-11-07 00:58:19,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:19,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120655280] [2021-11-07 00:58:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:19,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:19,450 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:19,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 00:58:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:21,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:58:21,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:58:22,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:58:22,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:22,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120655280] [2021-11-07 00:58:22,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120655280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:22,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1037092733] [2021-11-07 00:58:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:22,730 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:22,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:22,731 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:22,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 00:58:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:58:25,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:58:25,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:58:26,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1037092733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:26,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:26,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 00:58:26,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160920761] [2021-11-07 00:58:26,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 00:58:26,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:26,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 00:58:26,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:58:26,229 INFO L87 Difference]: Start difference. First operand 1486 states and 1898 transitions. Second operand has 10 states, 10 states have (on average 18.8) internal successors, (188), 10 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:29,761 INFO L93 Difference]: Finished difference Result 17514 states and 23249 transitions. [2021-11-07 00:58:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 00:58:29,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.8) internal successors, (188), 10 states have internal predecessors, (188), 0 states have call successors, (0), 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 189 [2021-11-07 00:58:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:29,809 INFO L225 Difference]: With dead ends: 17514 [2021-11-07 00:58:29,809 INFO L226 Difference]: Without dead ends: 16365 [2021-11-07 00:58:29,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 00:58:29,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16365 states. [2021-11-07 00:58:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16365 to 1498. [2021-11-07 00:58:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 1.2758851035404142) internal successors, (1910), 1497 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 1910 transitions. [2021-11-07 00:58:30,167 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 1910 transitions. Word has length 189 [2021-11-07 00:58:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:30,168 INFO L470 AbstractCegarLoop]: Abstraction has 1498 states and 1910 transitions. [2021-11-07 00:58:30,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.8) internal successors, (188), 10 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:30,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 1910 transitions. [2021-11-07 00:58:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 00:58:30,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:30,172 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:30,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:30,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-07 00:58:30,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:30,578 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash -88961249, now seen corresponding path program 1 times [2021-11-07 00:58:30,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:30,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755385154] [2021-11-07 00:58:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:30,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:30,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:30,582 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:30,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 00:58:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:33,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:58:33,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:58:33,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:58:34,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:34,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755385154] [2021-11-07 00:58:34,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755385154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:34,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1354370897] [2021-11-07 00:58:34,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:34,663 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:34,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:34,666 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:34,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 00:58:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:37,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:58:37,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:58:38,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:58:39,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1354370897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:39,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:39,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-07 00:58:39,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069590917] [2021-11-07 00:58:39,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 00:58:39,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 00:58:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:58:39,107 INFO L87 Difference]: Start difference. First operand 1498 states and 1910 transitions. Second operand has 14 states, 14 states have (on average 13.857142857142858) internal successors, (194), 14 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:50,913 INFO L93 Difference]: Finished difference Result 28590 states and 37953 transitions. [2021-11-07 00:58:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-07 00:58:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.857142857142858) internal successors, (194), 14 states have internal predecessors, (194), 0 states have call successors, (0), 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 190 [2021-11-07 00:58:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:50,977 INFO L225 Difference]: With dead ends: 28590 [2021-11-07 00:58:50,978 INFO L226 Difference]: Without dead ends: 27429 [2021-11-07 00:58:50,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1158, Invalid=5648, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 00:58:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27429 states. [2021-11-07 00:58:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27429 to 1502. [2021-11-07 00:58:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 1.2751499000666222) internal successors, (1914), 1501 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 1914 transitions. [2021-11-07 00:58:51,505 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 1914 transitions. Word has length 190 [2021-11-07 00:58:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:51,505 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 1914 transitions. [2021-11-07 00:58:51,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.857142857142858) internal successors, (194), 14 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 1914 transitions. [2021-11-07 00:58:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 00:58:51,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:51,509 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:58:51,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:51,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:51,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:51,935 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:58:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:51,935 INFO L85 PathProgramCache]: Analyzing trace with hash 129893469, now seen corresponding path program 1 times [2021-11-07 00:58:51,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:51,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711346414] [2021-11-07 00:58:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:51,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:51,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:51,938 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:51,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 00:58:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:58:54,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:58:54,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:58:55,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:55,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711346414] [2021-11-07 00:58:55,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711346414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:58:55,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [105581067] [2021-11-07 00:58:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:55,603 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:58:55,603 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:58:55,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 00:58:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:58,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 00:58:58,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:58:59,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:58:59,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [105581067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:59,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 00:58:59,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-07 00:58:59,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147948052] [2021-11-07 00:58:59,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 00:58:59,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:59,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 00:58:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:58:59,809 INFO L87 Difference]: Start difference. First operand 1502 states and 1914 transitions. Second operand has 9 states, 9 states have (on average 22.88888888888889) internal successors, (206), 9 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:02,124 INFO L93 Difference]: Finished difference Result 5039 states and 6562 transitions. [2021-11-07 00:59:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:59:02,125 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 22.88888888888889) internal successors, (206), 9 states have internal predecessors, (206), 0 states have call successors, (0), 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 190 [2021-11-07 00:59:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:02,132 INFO L225 Difference]: With dead ends: 5039 [2021-11-07 00:59:02,132 INFO L226 Difference]: Without dead ends: 3575 [2021-11-07 00:59:02,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 746 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-07 00:59:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-11-07 00:59:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 1583. [2021-11-07 00:59:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 1.259165613147914) internal successors, (1992), 1582 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 1992 transitions. [2021-11-07 00:59:02,517 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 1992 transitions. Word has length 190 [2021-11-07 00:59:02,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:02,518 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 1992 transitions. [2021-11-07 00:59:02,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.88888888888889) internal successors, (206), 9 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 1992 transitions. [2021-11-07 00:59:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-07 00:59:02,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:02,522 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:02,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:02,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-07 00:59:02,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:02,939 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1713157909, now seen corresponding path program 1 times [2021-11-07 00:59:02,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:02,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157136885] [2021-11-07 00:59:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:02,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:02,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:02,941 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:02,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 00:59:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:05,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:59:05,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:59:05,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:59:06,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:06,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157136885] [2021-11-07 00:59:06,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157136885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:06,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1746137067] [2021-11-07 00:59:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:06,513 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:06,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:06,513 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:06,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 00:59:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:10,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:59:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:59:10,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:59:11,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1746137067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:11,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153366027] [2021-11-07 00:59:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:11,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:59:11,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:59:11,445 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:59:11,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 00:59:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:14,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:59:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:59:14,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 00:59:16,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153366027] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:16,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 00:59:16,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 00:59:16,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093160302] [2021-11-07 00:59:16,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:59:16,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:16,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:59:16,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 00:59:16,193 INFO L87 Difference]: Start difference. First operand 1583 states and 1992 transitions. Second operand has 6 states, 6 states have (on average 49.666666666666664) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:21,035 INFO L93 Difference]: Finished difference Result 6724 states and 8559 transitions. [2021-11-07 00:59:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:59:21,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 49.666666666666664) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 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 194 [2021-11-07 00:59:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:21,043 INFO L225 Difference]: With dead ends: 6724 [2021-11-07 00:59:21,044 INFO L226 Difference]: Without dead ends: 5401 [2021-11-07 00:59:21,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1159 GetRequests, 1148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-07 00:59:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-11-07 00:59:21,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 2916. [2021-11-07 00:59:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 1.2538593481989708) internal successors, (3655), 2915 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 3655 transitions. [2021-11-07 00:59:21,955 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 3655 transitions. Word has length 194 [2021-11-07 00:59:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:21,955 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 3655 transitions. [2021-11-07 00:59:21,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.666666666666664) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 3655 transitions. [2021-11-07 00:59:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-07 00:59:21,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:21,962 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:21,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:22,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-07 00:59:22,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:22,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:22,575 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:22,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:22,576 INFO L85 PathProgramCache]: Analyzing trace with hash 655319831, now seen corresponding path program 1 times [2021-11-07 00:59:22,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:22,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989067587] [2021-11-07 00:59:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:22,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:22,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:22,578 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:22,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 00:59:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:25,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:59:25,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:59:25,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:59:26,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:26,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989067587] [2021-11-07 00:59:26,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989067587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:26,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1522547562] [2021-11-07 00:59:26,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:26,410 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:26,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:26,417 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:26,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 00:59:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:30,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:59:30,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:59:31,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 00:59:31,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1522547562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:31,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132923629] [2021-11-07 00:59:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:31,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 00:59:31,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:59:31,545 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 00:59:31,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 00:59:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:34,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:59:34,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 00:59:35,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 00:59:35,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132923629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:35,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 00:59:35,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 10 [2021-11-07 00:59:35,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387310125] [2021-11-07 00:59:35,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 00:59:35,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 00:59:35,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:59:35,571 INFO L87 Difference]: Start difference. First operand 2916 states and 3655 transitions. Second operand has 10 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:37,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:37,486 INFO L93 Difference]: Finished difference Result 5832 states and 7331 transitions. [2021-11-07 00:59:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 00:59:37,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 0 states have call successors, (0), 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 194 [2021-11-07 00:59:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:37,490 INFO L225 Difference]: With dead ends: 5832 [2021-11-07 00:59:37,490 INFO L226 Difference]: Without dead ends: 2938 [2021-11-07 00:59:37,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1162 GetRequests, 1152 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-11-07 00:59:37,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-11-07 00:59:38,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-11-07 00:59:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 1.2519577800476678) internal successors, (3677), 2937 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 3677 transitions. [2021-11-07 00:59:38,246 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 3677 transitions. Word has length 194 [2021-11-07 00:59:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:38,246 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 3677 transitions. [2021-11-07 00:59:38,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 3677 transitions. [2021-11-07 00:59:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-07 00:59:38,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:38,250 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:38,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:38,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-07 00:59:38,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:38,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:38,851 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:59:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash -656944873, now seen corresponding path program 2 times [2021-11-07 00:59:38,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:38,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128916311] [2021-11-07 00:59:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:59:38,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:38,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:38,854 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:38,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 00:59:55,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 00:59:55,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 00:59:55,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 00:59:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-07 00:59:56,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-07 00:59:57,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:57,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128916311] [2021-11-07 00:59:57,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128916311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 00:59:57,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [534341930] [2021-11-07 00:59:57,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 00:59:57,703 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 00:59:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 00:59:57,709 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 00:59:57,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 01:01:36,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:01:36,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:01:37,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:01:37,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-07 01:01:37,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-07 01:01:38,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [534341930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:01:38,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582998974] [2021-11-07 01:01:38,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:01:38,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:01:38,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:01:38,615 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:01:38,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 01:02:23,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:02:23,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:02:24,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:02:24,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-07 01:02:24,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-07 01:02:27,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582998974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:02:27,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:02:27,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 22 [2021-11-07 01:02:27,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390251436] [2021-11-07 01:02:27,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 01:02:27,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:27,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 01:02:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:02:27,212 INFO L87 Difference]: Start difference. First operand 2938 states and 3677 transitions. Second operand has 22 states, 22 states have (on average 9.272727272727273) internal successors, (204), 22 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:09,884 INFO L93 Difference]: Finished difference Result 8769 states and 11017 transitions. [2021-11-07 01:03:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:03:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 9.272727272727273) internal successors, (204), 22 states have internal predecessors, (204), 0 states have call successors, (0), 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 216 [2021-11-07 01:03:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:09,891 INFO L225 Difference]: With dead ends: 8769 [2021-11-07 01:03:09,891 INFO L226 Difference]: Without dead ends: 5857 [2021-11-07 01:03:09,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1301 GetRequests, 1270 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 01:03:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5857 states. [2021-11-07 01:03:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5857 to 2976. [2021-11-07 01:03:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2975 states have (on average 1.2507563025210084) internal successors, (3721), 2975 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 3721 transitions. [2021-11-07 01:03:10,966 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 3721 transitions. Word has length 216 [2021-11-07 01:03:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:10,966 INFO L470 AbstractCegarLoop]: Abstraction has 2976 states and 3721 transitions. [2021-11-07 01:03:10,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.272727272727273) internal successors, (204), 22 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 3721 transitions. [2021-11-07 01:03:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-07 01:03:10,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:10,971 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:11,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:11,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:11,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:11,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:11,572 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:11,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash 125755607, now seen corresponding path program 3 times [2021-11-07 01:03:11,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:11,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878062404] [2021-11-07 01:03:11,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:03:11,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:11,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:11,575 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:11,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c251c152-d107-430e-a9e3-d8ea2d5bfb93/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 01:03:27,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:03:27,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:03:27,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:03:27,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:28,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:28,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:28,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:28,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:28,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:28,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:28,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:28,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:28,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 79 [2021-11-07 01:03:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:31,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:03:31,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 148 treesize of output 56 [2021-11-07 01:03:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-07 01:03:32,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:32,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 386 treesize of output 372