./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:07:21,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:07:21,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:07:21,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:07:21,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:07:21,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:07:21,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:07:21,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:07:21,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:07:21,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:07:21,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:07:21,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:07:21,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:07:21,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:07:21,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:07:21,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:07:21,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:07:21,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:07:21,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:07:21,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:07:21,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:07:21,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:07:21,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:07:21,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:07:21,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:07:21,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:07:21,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:07:21,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:07:21,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:07:21,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:07:21,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:07:21,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:07:21,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:07:21,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:07:21,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:07:21,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:07:21,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:07:21,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:07:21,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:07:21,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:07:21,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:07:21,950 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:07:21,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:07:21,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:07:22,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:07:22,000 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:07:22,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:07:22,001 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:07:22,001 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:07:22,001 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:07:22,007 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:07:22,008 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:07:22,009 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:07:22,009 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:07:22,009 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:07:22,009 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:07:22,010 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:07:22,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:07:22,011 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:07:22,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:07:22,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:07:22,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:07:22,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:07:22,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:07:22,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:07:22,012 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:07:22,012 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:07:22,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:07:22,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:07:22,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:07:22,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:07:22,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:07:22,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:07:22,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:07:22,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:07:22,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:07:22,015 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:07:22,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:07:22,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:07:22,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:07:22,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:07:22,016 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_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 [2021-11-03 04:07:22,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:07:22,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:07:22,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:07:22,355 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:07:22,355 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:07:22,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2021-11-03 04:07:22,438 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/data/5879a7d6e/d74c06deef8a45fc98860d6008c4304c/FLAGa91b28c68 [2021-11-03 04:07:23,058 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:07:23,058 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2021-11-03 04:07:23,091 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/data/5879a7d6e/d74c06deef8a45fc98860d6008c4304c/FLAGa91b28c68 [2021-11-03 04:07:23,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/data/5879a7d6e/d74c06deef8a45fc98860d6008c4304c [2021-11-03 04:07:23,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:07:23,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:07:23,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:07:23,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:07:23,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:07:23,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:23" (1/1) ... [2021-11-03 04:07:23,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e5199d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:23, skipping insertion in model container [2021-11-03 04:07:23,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:23" (1/1) ... [2021-11-03 04:07:23,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:07:23,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:07:23,901 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_0b1ad433-045b-4332-953a-dff8965d018e/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2021-11-03 04:07:23,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:07:23,934 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:07:23,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@216f2058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:23, skipping insertion in model container [2021-11-03 04:07:23,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:07:23,936 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:07:23,940 INFO L168 Benchmark]: Toolchain (without parser) took 643.53 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 53.8 MB in the beginning and 72.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:07:23,941 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 61.9 MB in the beginning and 61.9 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:07:23,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 640.86 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 53.7 MB in the beginning and 72.0 MB in the end (delta: -18.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:07:23,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 61.9 MB in the beginning and 61.9 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 640.86 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 53.7 MB in the beginning and 72.0 MB in the end (delta: -18.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2802]: 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_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:07:26,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:07:26,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:07:26,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:07:26,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:07:26,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:07:26,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:07:26,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:07:26,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:07:26,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:07:26,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:07:26,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:07:26,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:07:26,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:07:26,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:07:26,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:07:26,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:07:26,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:07:26,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:07:26,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:07:26,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:07:26,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:07:26,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:07:26,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:07:26,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:07:26,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:07:26,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:07:26,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:07:26,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:07:26,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:07:26,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:07:26,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:07:26,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:07:26,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:07:26,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:07:26,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:07:26,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:07:26,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:07:26,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:07:26,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:07:26,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:07:26,380 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:07:26,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:07:26,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:07:26,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:07:26,418 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:07:26,418 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:07:26,419 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:07:26,419 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:07:26,419 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:07:26,419 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:07:26,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:07:26,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:07:26,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:07:26,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:07:26,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:07:26,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:07:26,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:07:26,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:07:26,422 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:07:26,422 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:07:26,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:07:26,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:07:26,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:07:26,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:07:26,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:07:26,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:07:26,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:07:26,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:07:26,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:07:26,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:07:26,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:07:26,425 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:07:26,425 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:07:26,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:07:26,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:07:26,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:07:26,426 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_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9a9e332bba43f0e6d965514fc764881b170e0a0500d860d4fcce12986d98914 [2021-11-03 04:07:26,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:07:26,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:07:26,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:07:26,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:07:26,821 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:07:26,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2021-11-03 04:07:26,899 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/data/b9af27879/fab57031632541819f9ee20daf2d997f/FLAG0f1c26997 [2021-11-03 04:07:27,684 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:07:27,685 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c [2021-11-03 04:07:27,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/data/b9af27879/fab57031632541819f9ee20daf2d997f/FLAG0f1c26997 [2021-11-03 04:07:27,844 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/data/b9af27879/fab57031632541819f9ee20daf2d997f [2021-11-03 04:07:27,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:07:27,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:07:27,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:07:27,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:07:27,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:07:27,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:27" (1/1) ... [2021-11-03 04:07:27,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3caa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:27, skipping insertion in model container [2021-11-03 04:07:27,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:27" (1/1) ... [2021-11-03 04:07:27,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:07:27,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:07:28,668 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_0b1ad433-045b-4332-953a-dff8965d018e/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2021-11-03 04:07:28,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:07:28,695 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:07:28,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:07:28,833 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_0b1ad433-045b-4332-953a-dff8965d018e/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2021-11-03 04:07:28,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:07:28,852 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:07:28,959 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_0b1ad433-045b-4332-953a-dff8965d018e/sv-benchmarks/c/product-lines/elevator_spec14_product24.cil.c[71679,71692] [2021-11-03 04:07:28,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:07:28,990 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:07:28,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28 WrapperNode [2021-11-03 04:07:28,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:07:28,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:07:28,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:07:28,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:07:29,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (1/1) ... [2021-11-03 04:07:29,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (1/1) ... [2021-11-03 04:07:30,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:07:30,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:07:30,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:07:30,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:07:30,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (1/1) ... [2021-11-03 04:07:30,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (1/1) ... [2021-11-03 04:07:30,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (1/1) ... [2021-11-03 04:07:30,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (1/1) ... [2021-11-03 04:07:31,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (1/1) ... [2021-11-03 04:07:31,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (1/1) ... [2021-11-03 04:07:31,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (1/1) ... [2021-11-03 04:07:31,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:07:31,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:07:31,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:07:31,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:07:31,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (1/1) ... [2021-11-03 04:07:31,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:07:31,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:07:31,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:07:31,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:07:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:07:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:07:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:07:31,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:08:06,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:08:06,489 INFO L299 CfgBuilder]: Removed 3823 assume(true) statements. [2021-11-03 04:08:06,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:08:06 BoogieIcfgContainer [2021-11-03 04:08:06,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:08:06,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:08:06,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:08:06,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:08:06,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:07:27" (1/3) ... [2021-11-03 04:08:06,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639e4105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:08:06, skipping insertion in model container [2021-11-03 04:08:06,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:28" (2/3) ... [2021-11-03 04:08:06,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639e4105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:08:06, skipping insertion in model container [2021-11-03 04:08:06,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:08:06" (3/3) ... [2021-11-03 04:08:06,517 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product24.cil.c [2021-11-03 04:08:06,522 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:08:06,522 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:08:06,628 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:08:06,635 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:08:06,635 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:08:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 16947 states, 16941 states have (on average 1.890030104480255) internal successors, (32019), 16946 states have internal predecessors, (32019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:08:06,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:06,945 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:08:06,946 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:08:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:06,952 INFO L85 PathProgramCache]: Analyzing trace with hash -174955907, now seen corresponding path program 1 times [2021-11-03 04:08:06,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:06,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520223993] [2021-11-03 04:08:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:06,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:06,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:06,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:06,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:08:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:07,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:08:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:07,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:07,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:07,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520223993] [2021-11-03 04:08:07,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520223993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:07,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:07,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:08:07,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964089765] [2021-11-03 04:08:07,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:08:07,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:07,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:08:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:08:07,598 INFO L87 Difference]: Start difference. First operand has 16947 states, 16941 states have (on average 1.890030104480255) internal successors, (32019), 16946 states have internal predecessors, (32019), 0 states have call successors, (0), 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 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:09,550 INFO L93 Difference]: Finished difference Result 47506 states and 89753 transitions. [2021-11-03 04:08:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:08:09,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:08:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:09,809 INFO L225 Difference]: With dead ends: 47506 [2021-11-03 04:08:09,809 INFO L226 Difference]: Without dead ends: 30559 [2021-11-03 04:08:09,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:08:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30559 states. [2021-11-03 04:08:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30559 to 16943. [2021-11-03 04:08:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16943 states, 16938 states have (on average 1.8891840831266973) internal successors, (31999), 16942 states have internal predecessors, (31999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16943 states to 16943 states and 31999 transitions. [2021-11-03 04:08:10,853 INFO L78 Accepts]: Start accepts. Automaton has 16943 states and 31999 transitions. Word has length 27 [2021-11-03 04:08:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:10,854 INFO L470 AbstractCegarLoop]: Abstraction has 16943 states and 31999 transitions. [2021-11-03 04:08:10,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 16943 states and 31999 transitions. [2021-11-03 04:08:10,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-03 04:08:10,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:10,865 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] [2021-11-03 04:08:10,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:11,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:11,080 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:08:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:11,083 INFO L85 PathProgramCache]: Analyzing trace with hash 977459209, now seen corresponding path program 1 times [2021-11-03 04:08:11,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:11,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232819853] [2021-11-03 04:08:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:11,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:11,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:11,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:11,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:08:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:08:11,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:11,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:11,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:11,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232819853] [2021-11-03 04:08:11,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232819853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:11,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:11,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:08:11,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134898495] [2021-11-03 04:08:11,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:08:11,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:11,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:08:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:08:11,710 INFO L87 Difference]: Start difference. First operand 16943 states and 31999 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:14,977 INFO L93 Difference]: Finished difference Result 67737 states and 127921 transitions. [2021-11-03 04:08:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:08:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 32 [2021-11-03 04:08:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:15,218 INFO L225 Difference]: With dead ends: 67737 [2021-11-03 04:08:15,218 INFO L226 Difference]: Without dead ends: 50815 [2021-11-03 04:08:15,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:08:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50815 states. [2021-11-03 04:08:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50815 to 16921. [2021-11-03 04:08:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16921 states, 16916 states have (on average 1.8886261527547883) internal successors, (31948), 16920 states have internal predecessors, (31948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16921 states to 16921 states and 31948 transitions. [2021-11-03 04:08:16,417 INFO L78 Accepts]: Start accepts. Automaton has 16921 states and 31948 transitions. Word has length 32 [2021-11-03 04:08:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:16,418 INFO L470 AbstractCegarLoop]: Abstraction has 16921 states and 31948 transitions. [2021-11-03 04:08:16,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 16921 states and 31948 transitions. [2021-11-03 04:08:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-03 04:08:16,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:16,428 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] [2021-11-03 04:08:16,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:16,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:16,647 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:08:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1400455191, now seen corresponding path program 1 times [2021-11-03 04:08:16,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:16,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617218166] [2021-11-03 04:08:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:16,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:16,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:16,665 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:16,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:08:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:08:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:17,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:17,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:17,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617218166] [2021-11-03 04:08:17,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617218166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:17,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:17,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:08:17,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569941990] [2021-11-03 04:08:17,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:08:17,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:08:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:08:17,163 INFO L87 Difference]: Start difference. First operand 16921 states and 31948 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:18,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:18,593 INFO L93 Difference]: Finished difference Result 47365 states and 89441 transitions. [2021-11-03 04:08:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:08:18,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-03 04:08:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:18,714 INFO L225 Difference]: With dead ends: 47365 [2021-11-03 04:08:18,714 INFO L226 Difference]: Without dead ends: 30465 [2021-11-03 04:08:18,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:08:18,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30465 states. [2021-11-03 04:08:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30465 to 16921. [2021-11-03 04:08:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16921 states, 16916 states have (on average 1.8882714589737526) internal successors, (31942), 16920 states have internal predecessors, (31942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16921 states to 16921 states and 31942 transitions. [2021-11-03 04:08:19,421 INFO L78 Accepts]: Start accepts. Automaton has 16921 states and 31942 transitions. Word has length 33 [2021-11-03 04:08:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:19,421 INFO L470 AbstractCegarLoop]: Abstraction has 16921 states and 31942 transitions. [2021-11-03 04:08:19,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 16921 states and 31942 transitions. [2021-11-03 04:08:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 04:08:19,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:19,424 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] [2021-11-03 04:08:19,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:19,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:19,638 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:08:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:19,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2110791356, now seen corresponding path program 1 times [2021-11-03 04:08:19,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:19,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896322406] [2021-11-03 04:08:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:19,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:19,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:19,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:19,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:08:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:20,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:08:20,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:20,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:20,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:20,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896322406] [2021-11-03 04:08:20,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896322406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:20,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:20,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:08:20,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118365853] [2021-11-03 04:08:20,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:08:20,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:20,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:08:20,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:08:20,290 INFO L87 Difference]: Start difference. First operand 16921 states and 31942 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:24,778 INFO L93 Difference]: Finished difference Result 94764 states and 178932 transitions. [2021-11-03 04:08:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:08:24,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 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 38 [2021-11-03 04:08:24,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:25,280 INFO L225 Difference]: With dead ends: 94764 [2021-11-03 04:08:25,280 INFO L226 Difference]: Without dead ends: 77867 [2021-11-03 04:08:25,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:08:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77867 states. [2021-11-03 04:08:26,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77867 to 16923. [2021-11-03 04:08:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16923 states, 16918 states have (on average 1.8878709067265633) internal successors, (31939), 16922 states have internal predecessors, (31939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16923 states to 16923 states and 31939 transitions. [2021-11-03 04:08:26,458 INFO L78 Accepts]: Start accepts. Automaton has 16923 states and 31939 transitions. Word has length 38 [2021-11-03 04:08:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:26,459 INFO L470 AbstractCegarLoop]: Abstraction has 16923 states and 31939 transitions. [2021-11-03 04:08:26,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 16923 states and 31939 transitions. [2021-11-03 04:08:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 04:08:26,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:26,461 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] [2021-11-03 04:08:26,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:26,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:26,674 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:08:26,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash -155097142, now seen corresponding path program 1 times [2021-11-03 04:08:26,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:26,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262896746] [2021-11-03 04:08:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:26,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:26,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:26,678 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:26,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:08:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:27,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:08:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:27,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:27,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:27,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262896746] [2021-11-03 04:08:27,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262896746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:27,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:27,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:08:27,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051608873] [2021-11-03 04:08:27,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:08:27,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:27,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:08:27,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:08:27,545 INFO L87 Difference]: Start difference. First operand 16923 states and 31939 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:31,393 INFO L93 Difference]: Finished difference Result 53879 states and 101773 transitions. [2021-11-03 04:08:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:08:31,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-03 04:08:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:31,457 INFO L225 Difference]: With dead ends: 53879 [2021-11-03 04:08:31,457 INFO L226 Difference]: Without dead ends: 40322 [2021-11-03 04:08:31,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:08:31,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40322 states. [2021-11-03 04:08:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40322 to 23548. [2021-11-03 04:08:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23548 states, 23543 states have (on average 1.887609905279701) internal successors, (44440), 23547 states have internal predecessors, (44440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23548 states to 23548 states and 44440 transitions. [2021-11-03 04:08:32,664 INFO L78 Accepts]: Start accepts. Automaton has 23548 states and 44440 transitions. Word has length 39 [2021-11-03 04:08:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:32,664 INFO L470 AbstractCegarLoop]: Abstraction has 23548 states and 44440 transitions. [2021-11-03 04:08:32,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 23548 states and 44440 transitions. [2021-11-03 04:08:32,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:08:32,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:32,671 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:08:32,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:32,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:32,884 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:08:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:32,884 INFO L85 PathProgramCache]: Analyzing trace with hash 617069500, now seen corresponding path program 1 times [2021-11-03 04:08:32,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:32,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710539732] [2021-11-03 04:08:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:32,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:32,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:32,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:32,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:08:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:33,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:08:33,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:33,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:33,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:33,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710539732] [2021-11-03 04:08:33,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710539732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:33,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:33,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:08:33,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111512476] [2021-11-03 04:08:33,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:08:33,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:08:33,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:08:33,695 INFO L87 Difference]: Start difference. First operand 23548 states and 44440 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:39,970 INFO L93 Difference]: Finished difference Result 49452 states and 92986 transitions. [2021-11-03 04:08:39,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:08:39,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 04:08:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:40,028 INFO L225 Difference]: With dead ends: 49452 [2021-11-03 04:08:40,029 INFO L226 Difference]: Without dead ends: 29130 [2021-11-03 04:08:40,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:08:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29130 states. [2021-11-03 04:08:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29130 to 28402. [2021-11-03 04:08:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28402 states, 28397 states have (on average 1.8811846321794556) internal successors, (53420), 28401 states have internal predecessors, (53420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28402 states to 28402 states and 53420 transitions. [2021-11-03 04:08:41,383 INFO L78 Accepts]: Start accepts. Automaton has 28402 states and 53420 transitions. Word has length 58 [2021-11-03 04:08:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:41,384 INFO L470 AbstractCegarLoop]: Abstraction has 28402 states and 53420 transitions. [2021-11-03 04:08:41,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 28402 states and 53420 transitions. [2021-11-03 04:08:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:08:41,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:41,395 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:08:41,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:41,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:41,610 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:08:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1188368834, now seen corresponding path program 1 times [2021-11-03 04:08:41,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:41,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352218766] [2021-11-03 04:08:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:41,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:41,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:41,613 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:41,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:08:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:42,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:08:42,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:42,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:42,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:42,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352218766] [2021-11-03 04:08:42,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352218766] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:42,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:42,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 04:08:42,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026320836] [2021-11-03 04:08:42,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:08:42,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:42,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:08:42,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:08:42,687 INFO L87 Difference]: Start difference. First operand 28402 states and 53420 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:43,766 INFO L93 Difference]: Finished difference Result 45540 states and 85533 transitions. [2021-11-03 04:08:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:08:43,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 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 58 [2021-11-03 04:08:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:43,790 INFO L225 Difference]: With dead ends: 45540 [2021-11-03 04:08:43,790 INFO L226 Difference]: Without dead ends: 19126 [2021-11-03 04:08:43,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:08:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19126 states. [2021-11-03 04:08:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19126 to 18259. [2021-11-03 04:08:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18259 states, 18254 states have (on average 1.8849019393009752) internal successors, (34407), 18258 states have internal predecessors, (34407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18259 states to 18259 states and 34407 transitions. [2021-11-03 04:08:44,510 INFO L78 Accepts]: Start accepts. Automaton has 18259 states and 34407 transitions. Word has length 58 [2021-11-03 04:08:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:44,511 INFO L470 AbstractCegarLoop]: Abstraction has 18259 states and 34407 transitions. [2021-11-03 04:08:44,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 18259 states and 34407 transitions. [2021-11-03 04:08:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:08:44,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:44,515 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:08:44,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:44,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:44,730 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:08:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:44,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2062438738, now seen corresponding path program 1 times [2021-11-03 04:08:44,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:44,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087211586] [2021-11-03 04:08:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:44,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:44,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:44,734 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:44,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:08:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:45,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:08:45,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:45,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:45,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:45,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087211586] [2021-11-03 04:08:45,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087211586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:45,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:45,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:08:45,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299323655] [2021-11-03 04:08:45,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:08:45,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:08:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:08:45,468 INFO L87 Difference]: Start difference. First operand 18259 states and 34407 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:58,702 INFO L93 Difference]: Finished difference Result 63270 states and 119479 transitions. [2021-11-03 04:08:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:08:58,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:08:58,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:58,791 INFO L225 Difference]: With dead ends: 63270 [2021-11-03 04:08:58,792 INFO L226 Difference]: Without dead ends: 45044 [2021-11-03 04:08:58,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:08:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45044 states. [2021-11-03 04:08:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45044 to 18259. [2021-11-03 04:08:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18259 states, 18254 states have (on average 1.8247507395639313) internal successors, (33309), 18258 states have internal predecessors, (33309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18259 states to 18259 states and 33309 transitions. [2021-11-03 04:08:59,650 INFO L78 Accepts]: Start accepts. Automaton has 18259 states and 33309 transitions. Word has length 59 [2021-11-03 04:08:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:59,650 INFO L470 AbstractCegarLoop]: Abstraction has 18259 states and 33309 transitions. [2021-11-03 04:08:59,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 18259 states and 33309 transitions. [2021-11-03 04:08:59,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:08:59,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:59,654 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:08:59,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:59,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:59,869 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:08:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:59,869 INFO L85 PathProgramCache]: Analyzing trace with hash -676991268, now seen corresponding path program 1 times [2021-11-03 04:08:59,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:59,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830065855] [2021-11-03 04:08:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:59,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:59,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:59,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:59,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:09:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:09:00,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:00,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:09:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:00,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:09:00,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830065855] [2021-11-03 04:09:00,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830065855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:00,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:00,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:09:00,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742593085] [2021-11-03 04:09:00,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:09:00,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:09:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:09:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:09:00,756 INFO L87 Difference]: Start difference. First operand 18259 states and 33309 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:12,798 INFO L93 Difference]: Finished difference Result 87581 states and 162111 transitions. [2021-11-03 04:09:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 04:09:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:09:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:12,897 INFO L225 Difference]: With dead ends: 87581 [2021-11-03 04:09:12,897 INFO L226 Difference]: Without dead ends: 69382 [2021-11-03 04:09:12,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:09:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69382 states. [2021-11-03 04:09:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69382 to 26121. [2021-11-03 04:09:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26121 states, 26116 states have (on average 1.8250880686169397) internal successors, (47664), 26120 states have internal predecessors, (47664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26121 states to 26121 states and 47664 transitions. [2021-11-03 04:09:14,155 INFO L78 Accepts]: Start accepts. Automaton has 26121 states and 47664 transitions. Word has length 71 [2021-11-03 04:09:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:14,156 INFO L470 AbstractCegarLoop]: Abstraction has 26121 states and 47664 transitions. [2021-11-03 04:09:14,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 26121 states and 47664 transitions. [2021-11-03 04:09:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:09:14,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:14,160 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:09:14,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:09:14,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:09:14,382 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:09:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1195159483, now seen corresponding path program 1 times [2021-11-03 04:09:14,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:09:14,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023126536] [2021-11-03 04:09:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:14,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:09:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:09:14,384 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:09:14,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:09:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:14,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:09:14,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:15,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:09:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:16,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:09:16,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023126536] [2021-11-03 04:09:16,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023126536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:16,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:16,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:09:16,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490595176] [2021-11-03 04:09:16,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:09:16,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:09:16,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:09:16,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:09:16,582 INFO L87 Difference]: Start difference. First operand 26121 states and 47664 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:25,614 INFO L93 Difference]: Finished difference Result 90100 states and 164171 transitions. [2021-11-03 04:09:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:09:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 04:09:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:25,699 INFO L225 Difference]: With dead ends: 90100 [2021-11-03 04:09:25,699 INFO L226 Difference]: Without dead ends: 64031 [2021-11-03 04:09:25,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:09:25,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64031 states. [2021-11-03 04:09:27,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64031 to 39222. [2021-11-03 04:09:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39222 states, 39217 states have (on average 1.8093173878675064) internal successors, (70956), 39221 states have internal predecessors, (70956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39222 states to 39222 states and 70956 transitions. [2021-11-03 04:09:27,321 INFO L78 Accepts]: Start accepts. Automaton has 39222 states and 70956 transitions. Word has length 74 [2021-11-03 04:09:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:27,322 INFO L470 AbstractCegarLoop]: Abstraction has 39222 states and 70956 transitions. [2021-11-03 04:09:27,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 39222 states and 70956 transitions. [2021-11-03 04:09:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:09:27,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:27,325 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:09:27,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-03 04:09:27,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:09:27,541 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:09:27,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:27,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1525935120, now seen corresponding path program 1 times [2021-11-03 04:09:27,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:09:27,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649532362] [2021-11-03 04:09:27,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:27,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:09:27,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:09:27,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:09:27,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:09:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:28,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:09:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:28,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:09:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:28,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:09:28,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649532362] [2021-11-03 04:09:28,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649532362] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:28,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:28,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:09:28,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883276907] [2021-11-03 04:09:28,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:09:28,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:09:28,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:09:28,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:09:28,529 INFO L87 Difference]: Start difference. First operand 39222 states and 70956 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:47,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:47,074 INFO L93 Difference]: Finished difference Result 192418 states and 350908 transitions. [2021-11-03 04:09:47,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:09:47,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-03 04:09:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:47,324 INFO L225 Difference]: With dead ends: 192418 [2021-11-03 04:09:47,324 INFO L226 Difference]: Without dead ends: 153247 [2021-11-03 04:09:47,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:09:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153247 states. [2021-11-03 04:09:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153247 to 52016. [2021-11-03 04:09:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52016 states, 52011 states have (on average 1.8075599392436215) internal successors, (94013), 52015 states have internal predecessors, (94013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52016 states to 52016 states and 94013 transitions. [2021-11-03 04:09:50,179 INFO L78 Accepts]: Start accepts. Automaton has 52016 states and 94013 transitions. Word has length 75 [2021-11-03 04:09:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:50,179 INFO L470 AbstractCegarLoop]: Abstraction has 52016 states and 94013 transitions. [2021-11-03 04:09:50,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 52016 states and 94013 transitions. [2021-11-03 04:09:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 04:09:50,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:50,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:09:50,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:09:50,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:09:50,397 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:09:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:50,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1745995485, now seen corresponding path program 1 times [2021-11-03 04:09:50,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:09:50,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827206281] [2021-11-03 04:09:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:50,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:09:50,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:09:50,402 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:09:50,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:09:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:50,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:09:50,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:51,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:09:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:51,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:09:51,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827206281] [2021-11-03 04:09:51,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827206281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:51,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:51,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:09:51,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442015194] [2021-11-03 04:09:51,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:09:51,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:09:51,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:09:51,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:09:51,553 INFO L87 Difference]: Start difference. First operand 52016 states and 94013 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:07,070 INFO L93 Difference]: Finished difference Result 160677 states and 293756 transitions. [2021-11-03 04:10:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:10:07,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-03 04:10:07,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:07,247 INFO L225 Difference]: With dead ends: 160677 [2021-11-03 04:10:07,247 INFO L226 Difference]: Without dead ends: 108699 [2021-11-03 04:10:07,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:10:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108699 states. [2021-11-03 04:10:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108699 to 68810. [2021-11-03 04:10:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68810 states, 68805 states have (on average 1.7676622338492842) internal successors, (121624), 68809 states have internal predecessors, (121624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68810 states to 68810 states and 121624 transitions. [2021-11-03 04:10:10,559 INFO L78 Accepts]: Start accepts. Automaton has 68810 states and 121624 transitions. Word has length 76 [2021-11-03 04:10:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:10,560 INFO L470 AbstractCegarLoop]: Abstraction has 68810 states and 121624 transitions. [2021-11-03 04:10:10,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 68810 states and 121624 transitions. [2021-11-03 04:10:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:10:10,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:10,562 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:10:10,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:10:10,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:10:10,762 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:10:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1915456101, now seen corresponding path program 1 times [2021-11-03 04:10:10,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:10:10,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430541140] [2021-11-03 04:10:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:10,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:10:10,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:10:10,765 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:10:10,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:10:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:11,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:10:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:11,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:10:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:11,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:10:11,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430541140] [2021-11-03 04:10:11,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430541140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:11,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:11,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:10:11,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899784947] [2021-11-03 04:10:11,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:10:11,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:10:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:10:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:10:11,809 INFO L87 Difference]: Start difference. First operand 68810 states and 121624 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:32,108 INFO L93 Difference]: Finished difference Result 503595 states and 895215 transitions. [2021-11-03 04:10:32,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:10:32,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-03 04:10:32,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:32,983 INFO L225 Difference]: With dead ends: 503595 [2021-11-03 04:10:32,983 INFO L226 Difference]: Without dead ends: 434832 [2021-11-03 04:10:33,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:10:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434832 states. [2021-11-03 04:10:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434832 to 111122. [2021-11-03 04:10:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111122 states, 111117 states have (on average 1.7734730059306856) internal successors, (197063), 111121 states have internal predecessors, (197063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111122 states to 111122 states and 197063 transitions. [2021-11-03 04:10:41,144 INFO L78 Accepts]: Start accepts. Automaton has 111122 states and 197063 transitions. Word has length 78 [2021-11-03 04:10:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:41,144 INFO L470 AbstractCegarLoop]: Abstraction has 111122 states and 197063 transitions. [2021-11-03 04:10:41,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 111122 states and 197063 transitions. [2021-11-03 04:10:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:10:41,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:41,146 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:10:41,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:10:41,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:10:41,347 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:10:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1521089315, now seen corresponding path program 1 times [2021-11-03 04:10:41,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:10:41,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232136439] [2021-11-03 04:10:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:41,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:10:41,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:10:41,349 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:10:41,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:10:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:41,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:10:41,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:42,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:10:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:42,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:10:42,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232136439] [2021-11-03 04:10:42,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232136439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:42,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:42,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:10:42,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880513118] [2021-11-03 04:10:42,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:10:42,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:10:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:10:42,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:10:42,406 INFO L87 Difference]: Start difference. First operand 111122 states and 197063 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:59,600 INFO L93 Difference]: Finished difference Result 299571 states and 539950 transitions. [2021-11-03 04:10:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 04:10:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-03 04:10:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:59,984 INFO L225 Difference]: With dead ends: 299571 [2021-11-03 04:10:59,984 INFO L226 Difference]: Without dead ends: 216861 [2021-11-03 04:11:00,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:11:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216861 states. [2021-11-03 04:11:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216861 to 111006. [2021-11-03 04:11:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111006 states, 111001 states have (on average 1.7732362771506562) internal successors, (196831), 111005 states have internal predecessors, (196831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111006 states to 111006 states and 196831 transitions. [2021-11-03 04:11:06,416 INFO L78 Accepts]: Start accepts. Automaton has 111006 states and 196831 transitions. Word has length 78 [2021-11-03 04:11:06,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:06,416 INFO L470 AbstractCegarLoop]: Abstraction has 111006 states and 196831 transitions. [2021-11-03 04:11:06,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 111006 states and 196831 transitions. [2021-11-03 04:11:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:11:06,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:06,419 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:11:06,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:11:06,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:11:06,620 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:11:06,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1334796899, now seen corresponding path program 1 times [2021-11-03 04:11:06,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:11:06,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988719929] [2021-11-03 04:11:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:06,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:11:06,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:11:06,622 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:11:06,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:11:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:07,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:11:07,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:11:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:07,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:11:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:07,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:11:07,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988719929] [2021-11-03 04:11:07,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988719929] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:07,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:07,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:11:07,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394917934] [2021-11-03 04:11:07,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:11:07,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:11:07,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:11:07,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:11:07,775 INFO L87 Difference]: Start difference. First operand 111006 states and 196831 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:17,060 INFO L93 Difference]: Finished difference Result 289844 states and 514512 transitions. [2021-11-03 04:11:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:11:17,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 04:11:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:17,380 INFO L225 Difference]: With dead ends: 289844 [2021-11-03 04:11:17,381 INFO L226 Difference]: Without dead ends: 195289 [2021-11-03 04:11:17,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:11:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195289 states. [2021-11-03 04:11:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195289 to 195279. [2021-11-03 04:11:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195279 states, 195274 states have (on average 1.7774409291559552) internal successors, (347088), 195278 states have internal predecessors, (347088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195279 states to 195279 states and 347088 transitions. [2021-11-03 04:11:27,693 INFO L78 Accepts]: Start accepts. Automaton has 195279 states and 347088 transitions. Word has length 85 [2021-11-03 04:11:27,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:27,694 INFO L470 AbstractCegarLoop]: Abstraction has 195279 states and 347088 transitions. [2021-11-03 04:11:27,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 195279 states and 347088 transitions. [2021-11-03 04:11:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 04:11:27,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:27,706 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:11:27,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:11:27,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:11:27,907 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:11:27,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:27,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1892854390, now seen corresponding path program 1 times [2021-11-03 04:11:27,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:11:27,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591152206] [2021-11-03 04:11:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:27,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:11:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:11:27,910 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:11:27,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:11:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:11:28,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:11:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:28,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:11:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:29,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:11:29,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591152206] [2021-11-03 04:11:29,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591152206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:29,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:29,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:11:29,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38914508] [2021-11-03 04:11:29,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:11:29,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:11:29,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:11:29,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:11:29,070 INFO L87 Difference]: Start difference. First operand 195279 states and 347088 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:45,559 INFO L93 Difference]: Finished difference Result 527723 states and 938250 transitions. [2021-11-03 04:11:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:11:45,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 04:11:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:46,286 INFO L225 Difference]: With dead ends: 527723 [2021-11-03 04:11:46,287 INFO L226 Difference]: Without dead ends: 363574 [2021-11-03 04:11:46,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:11:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363574 states. [2021-11-03 04:12:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363574 to 363564. [2021-11-03 04:12:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363564 states, 363559 states have (on average 1.7794498279508966) internal successors, (646935), 363563 states have internal predecessors, (646935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363564 states to 363564 states and 646935 transitions. [2021-11-03 04:12:05,528 INFO L78 Accepts]: Start accepts. Automaton has 363564 states and 646935 transitions. Word has length 86 [2021-11-03 04:12:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:12:05,528 INFO L470 AbstractCegarLoop]: Abstraction has 363564 states and 646935 transitions. [2021-11-03 04:12:05,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 363564 states and 646935 transitions. [2021-11-03 04:12:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-03 04:12:05,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:05,531 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:12:05,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:12:05,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:12:05,731 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:12:05,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash -616067966, now seen corresponding path program 1 times [2021-11-03 04:12:05,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:12:05,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889659627] [2021-11-03 04:12:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:05,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:12:05,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:12:05,734 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:12:05,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b1ad433-045b-4332-953a-dff8965d018e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:12:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:12:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:12:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:12:06,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:12:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:12:07,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:12:07,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889659627] [2021-11-03 04:12:07,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889659627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:07,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:12:07,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:12:07,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641068408] [2021-11-03 04:12:07,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:12:07,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:12:07,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:12:07,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:12:07,016 INFO L87 Difference]: Start difference. First operand 363564 states and 646935 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:12:39,578 INFO L93 Difference]: Finished difference Result 1002738 states and 1783533 transitions. [2021-11-03 04:12:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:12:39,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-03 04:12:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. --- End real Ultimate output --- Execution finished with exit code -9 Writing output log to file Ultimate.log Result: UNKNOWN