./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/s3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/s3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8 --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 22366af6514966a73d28a63d2bc4f38bf02b60e4 ............................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/s3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8 --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 22366af6514966a73d28a63d2bc4f38bf02b60e4 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:45:04,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:45:04,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:45:04,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:45:04,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:45:04,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:45:04,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:45:04,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:45:04,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:45:04,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:45:04,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:45:04,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:45:04,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:45:04,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:45:04,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:45:04,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:45:04,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:45:04,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:45:04,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:45:04,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:45:04,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:45:04,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:45:04,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:45:04,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:45:04,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:45:04,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:45:04,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:45:04,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:45:04,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:45:04,875 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:45:04,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:45:04,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:45:04,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:45:04,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:45:04,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:45:04,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:45:04,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:45:04,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:45:04,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:45:04,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:45:04,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:45:04,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:45:04,916 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:45:04,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:45:04,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:45:04,917 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:45:04,918 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:45:04,918 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:45:04,918 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:45:04,919 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:45:04,919 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:45:04,919 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:45:04,919 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:45:04,920 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:45:04,920 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:45:04,920 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:45:04,920 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:45:04,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:45:04,922 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:45:04,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:45:04,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:45:04,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:45:04,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:45:04,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:45:04,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:45:04,923 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:45:04,924 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:45:04,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:45:04,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:45:04,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:45:04,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:45:04,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:45:04,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:45:04,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:45:04,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:45:04,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:45:04,926 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:45:04,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:45:04,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:45:04,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:45:04,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:45:04,928 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_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22366af6514966a73d28a63d2bc4f38bf02b60e4 [2021-10-13 06:45:05,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:45:05,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:45:05,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:45:05,210 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:45:05,211 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:45:05,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/s3.i [2021-10-13 06:45:05,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/data/7a17feca1/771e4be7c0134529a68be0573db3f097/FLAGae3719fb9 [2021-10-13 06:45:05,883 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:45:05,884 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/sv-benchmarks/c/loops/s3.i [2021-10-13 06:45:05,925 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/data/7a17feca1/771e4be7c0134529a68be0573db3f097/FLAGae3719fb9 [2021-10-13 06:45:06,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/data/7a17feca1/771e4be7c0134529a68be0573db3f097 [2021-10-13 06:45:06,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:45:06,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:45:06,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:45:06,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:45:06,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:45:06,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:45:06" (1/1) ... [2021-10-13 06:45:06,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fa6dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:06, skipping insertion in model container [2021-10-13 06:45:06,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:45:06" (1/1) ... [2021-10-13 06:45:06,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:45:06,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:45:06,661 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_beff0a32-38f7-473e-9e85-e409b5046af2/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-13 06:45:06,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:45:06,703 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) [2021-10-13 06:45:06,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39a5ec1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:06, skipping insertion in model container [2021-10-13 06:45:06,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:45:06,705 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-13 06:45:06,707 INFO L168 Benchmark]: Toolchain (without parser) took 579.94 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 53.6 MB in the beginning and 86.9 MB in the end (delta: -33.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:06,709 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory was 59.7 MB in the beginning and 59.6 MB in the end (delta: 27.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:45:06,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 577.57 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 53.6 MB in the beginning and 86.9 MB in the end (delta: -33.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:06,713 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory was 59.7 MB in the beginning and 59.6 MB in the end (delta: 27.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 577.57 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 53.6 MB in the beginning and 86.9 MB in the end (delta: -33.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1038]: 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:45:08,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:45:09,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:45:09,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:45:09,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:45:09,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:45:09,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:45:09,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:45:09,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:45:09,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:45:09,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:45:09,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:45:09,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:45:09,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:45:09,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:45:09,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:45:09,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:45:09,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:45:09,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:45:09,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:45:09,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:45:09,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:45:09,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:45:09,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:45:09,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:45:09,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:45:09,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:45:09,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:45:09,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:45:09,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:45:09,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:45:09,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:45:09,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:45:09,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:45:09,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:45:09,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:45:09,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:45:09,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:45:09,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:45:09,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:45:09,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:45:09,115 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:45:09,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:45:09,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:45:09,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:45:09,150 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:45:09,150 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:45:09,150 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:45:09,150 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:45:09,150 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:45:09,151 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:45:09,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:45:09,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:45:09,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:45:09,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:45:09,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:45:09,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:45:09,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:45:09,153 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:45:09,153 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:45:09,153 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:45:09,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:45:09,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:45:09,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:45:09,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:45:09,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:45:09,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:45:09,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:45:09,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:45:09,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:45:09,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:45:09,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:45:09,155 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:45:09,155 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:09,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:45:09,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:45:09,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:45:09,155 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_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22366af6514966a73d28a63d2bc4f38bf02b60e4 [2021-10-13 06:45:09,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:45:09,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:45:09,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:45:09,599 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:45:09,601 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:45:09,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loops/s3.i [2021-10-13 06:45:09,684 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/data/ecfd2e187/8c901d859417460087d6f6600f49504a/FLAG7d425c404 [2021-10-13 06:45:10,384 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:45:10,387 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/sv-benchmarks/c/loops/s3.i [2021-10-13 06:45:10,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/data/ecfd2e187/8c901d859417460087d6f6600f49504a/FLAG7d425c404 [2021-10-13 06:45:10,613 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/data/ecfd2e187/8c901d859417460087d6f6600f49504a [2021-10-13 06:45:10,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:45:10,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:45:10,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:45:10,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:45:10,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:45:10,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:45:10" (1/1) ... [2021-10-13 06:45:10,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6658a504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:10, skipping insertion in model container [2021-10-13 06:45:10,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:45:10" (1/1) ... [2021-10-13 06:45:10,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:45:10,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:45:11,101 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_beff0a32-38f7-473e-9e85-e409b5046af2/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-13 06:45:11,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:45:11,127 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 06:45:11,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:45:11,247 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_beff0a32-38f7-473e-9e85-e409b5046af2/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-13 06:45:11,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:45:11,259 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:45:11,346 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_beff0a32-38f7-473e-9e85-e409b5046af2/sv-benchmarks/c/loops/s3.i[64167,64180] [2021-10-13 06:45:11,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:45:11,367 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:45:11,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11 WrapperNode [2021-10-13 06:45:11,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:45:11,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:45:11,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:45:11,370 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:45:11,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (1/1) ... [2021-10-13 06:45:11,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (1/1) ... [2021-10-13 06:45:11,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:45:11,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:45:11,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:45:11,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:45:11,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (1/1) ... [2021-10-13 06:45:11,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (1/1) ... [2021-10-13 06:45:11,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (1/1) ... [2021-10-13 06:45:11,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (1/1) ... [2021-10-13 06:45:11,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (1/1) ... [2021-10-13 06:45:11,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (1/1) ... [2021-10-13 06:45:11,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (1/1) ... [2021-10-13 06:45:11,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:45:11,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:45:11,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:45:11,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:45:11,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (1/1) ... [2021-10-13 06:45:11,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:45:11,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:11,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:45:11,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:45:11,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:45:11,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:45:11,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:45:11,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 06:45:11,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:45:11,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:45:11,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:45:11,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:45:11,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 06:45:11,992 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-13 06:45:21,372 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-13 06:45:21,372 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-13 06:45:21,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:45:21,381 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 06:45:21,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:21 BoogieIcfgContainer [2021-10-13 06:45:21,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:45:21,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:45:21,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:45:21,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:45:21,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:45:10" (1/3) ... [2021-10-13 06:45:21,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4fe8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:45:21, skipping insertion in model container [2021-10-13 06:45:21,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:11" (2/3) ... [2021-10-13 06:45:21,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4fe8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:45:21, skipping insertion in model container [2021-10-13 06:45:21,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:21" (3/3) ... [2021-10-13 06:45:21,392 INFO L111 eAbstractionObserver]: Analyzing ICFG s3.i [2021-10-13 06:45:21,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:45:21,397 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:45:21,457 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:45:21,466 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, mConcurrency=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 [2021-10-13 06:45:21,466 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:45:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:45:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 06:45:21,506 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:21,507 INFO L512 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] [2021-10-13 06:45:21,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:21,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1457703967, now seen corresponding path program 1 times [2021-10-13 06:45:21,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:21,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290546441] [2021-10-13 06:45:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:21,544 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:21,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:21,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:21,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:45:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:45:21,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:22,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:22,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:22,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290546441] [2021-10-13 06:45:22,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290546441] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:22,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:22,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:45:22,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126379362] [2021-10-13 06:45:22,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:45:22,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:22,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:45:22,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:45:22,241 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 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 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:45:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:22,383 INFO L93 Difference]: Finished difference Result 375 states and 626 transitions. [2021-10-13 06:45:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:45:22,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 24 [2021-10-13 06:45:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:22,396 INFO L225 Difference]: With dead ends: 375 [2021-10-13 06:45:22,396 INFO L226 Difference]: Without dead ends: 217 [2021-10-13 06:45:22,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:45:22,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-13 06:45:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-10-13 06:45:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4814814814814814) internal successors, (320), 216 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:45:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 320 transitions. [2021-10-13 06:45:22,449 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 320 transitions. Word has length 24 [2021-10-13 06:45:22,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:22,449 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 320 transitions. [2021-10-13 06:45:22,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:45:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 320 transitions. [2021-10-13 06:45:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 06:45:22,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:22,453 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:22,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:22,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:22,666 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1495258694, now seen corresponding path program 1 times [2021-10-13 06:45:22,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:22,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861524845] [2021-10-13 06:45:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:22,669 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:22,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:22,670 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:22,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:45:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:22,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:45:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:23,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:23,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:23,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861524845] [2021-10-13 06:45:23,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861524845] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:23,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:23,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:45:23,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004540804] [2021-10-13 06:45:23,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:45:23,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:23,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:45:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:45:23,444 INFO L87 Difference]: Start difference. First operand 217 states and 320 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2021-10-13 06:45:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:25,671 INFO L93 Difference]: Finished difference Result 628 states and 933 transitions. [2021-10-13 06:45:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:45:25,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 41 [2021-10-13 06:45:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:25,677 INFO L225 Difference]: With dead ends: 628 [2021-10-13 06:45:25,678 INFO L226 Difference]: Without dead ends: 521 [2021-10-13 06:45:25,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:45:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-10-13 06:45:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 421. [2021-10-13 06:45:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.480952380952381) internal successors, (622), 420 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:45:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 622 transitions. [2021-10-13 06:45:25,743 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 622 transitions. Word has length 41 [2021-10-13 06:45:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:25,744 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 622 transitions. [2021-10-13 06:45:25,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2021-10-13 06:45:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 622 transitions. [2021-10-13 06:45:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-13 06:45:25,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:25,758 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:25,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:25,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:25,959 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:25,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:25,960 INFO L82 PathProgramCache]: Analyzing trace with hash 924360661, now seen corresponding path program 1 times [2021-10-13 06:45:25,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:25,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906814533] [2021-10-13 06:45:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:25,962 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:25,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:25,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:25,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:45:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:26,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:45:26,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 06:45:26,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 06:45:27,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:27,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906814533] [2021-10-13 06:45:27,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906814533] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:27,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:27,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:45:27,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121974611] [2021-10-13 06:45:27,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:45:27,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:45:27,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:45:27,055 INFO L87 Difference]: Start difference. First operand 421 states and 622 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:45:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:29,223 INFO L93 Difference]: Finished difference Result 939 states and 1394 transitions. [2021-10-13 06:45:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:45:29,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 80 [2021-10-13 06:45:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:29,227 INFO L225 Difference]: With dead ends: 939 [2021-10-13 06:45:29,228 INFO L226 Difference]: Without dead ends: 628 [2021-10-13 06:45:29,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:45:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-10-13 06:45:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2021-10-13 06:45:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.4784688995215312) internal successors, (927), 627 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:45:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 927 transitions. [2021-10-13 06:45:29,259 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 927 transitions. Word has length 80 [2021-10-13 06:45:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:29,260 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 927 transitions. [2021-10-13 06:45:29,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:45:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 927 transitions. [2021-10-13 06:45:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-13 06:45:29,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:29,265 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:29,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:29,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:29,483 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:29,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1855651051, now seen corresponding path program 1 times [2021-10-13 06:45:29,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:29,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226965720] [2021-10-13 06:45:29,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:29,486 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:29,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:29,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:29,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 06:45:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:30,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:45:30,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:30,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:30,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:30,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:30,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:45:30,441 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-10-13 06:45:30,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-10-13 06:45:30,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:45:30,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:45:30,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:45:31,083 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-10-13 06:45:31,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-10-13 06:45:32,629 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:45:32,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-10-13 06:45:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-13 06:45:32,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-13 06:45:33,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:33,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226965720] [2021-10-13 06:45:33,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226965720] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:33,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:33,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-10-13 06:45:33,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594348949] [2021-10-13 06:45:33,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 06:45:33,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 06:45:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 06:45:33,443 INFO L87 Difference]: Start difference. First operand 628 states and 927 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:46:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:46:28,863 INFO L93 Difference]: Finished difference Result 2264 states and 3359 transitions. [2021-10-13 06:46:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 06:46:28,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 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 100 [2021-10-13 06:46:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:46:28,878 INFO L225 Difference]: With dead ends: 2264 [2021-10-13 06:46:28,878 INFO L226 Difference]: Without dead ends: 1643 [2021-10-13 06:46:28,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 06:46:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-10-13 06:46:28,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 753. [2021-10-13 06:46:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 1.5106382978723405) internal successors, (1136), 752 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:46:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1136 transitions. [2021-10-13 06:46:28,967 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1136 transitions. Word has length 100 [2021-10-13 06:46:28,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:46:28,968 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1136 transitions. [2021-10-13 06:46:28,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:46:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1136 transitions. [2021-10-13 06:46:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-13 06:46:28,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:46:28,976 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:46:29,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:29,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:46:29,185 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:46:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:46:29,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1223162519, now seen corresponding path program 1 times [2021-10-13 06:46:29,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:46:29,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212414391] [2021-10-13 06:46:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:29,187 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:46:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:46:29,189 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:46:29,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:46:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:46:29,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:46:29,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:30,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:46:30,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:46:30,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:46:30,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:46:30,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:46:30,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:46:30,626 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:46:30,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:46:32,415 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:46:32,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:46:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 06:46:32,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 06:46:32,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:46:32,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212414391] [2021-10-13 06:46:32,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212414391] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:46:32,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:46:32,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-13 06:46:32,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611061335] [2021-10-13 06:46:32,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:46:32,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:46:32,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:46:32,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:46:32,911 INFO L87 Difference]: Start difference. First operand 753 states and 1136 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2021-10-13 06:46:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:46:59,332 INFO L93 Difference]: Finished difference Result 1757 states and 2634 transitions. [2021-10-13 06:46:59,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:46:59,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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 100 [2021-10-13 06:46:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:46:59,345 INFO L225 Difference]: With dead ends: 1757 [2021-10-13 06:46:59,345 INFO L226 Difference]: Without dead ends: 1011 [2021-10-13 06:46:59,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:46:59,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-10-13 06:46:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 873. [2021-10-13 06:46:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.5378440366972477) internal successors, (1341), 872 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:46:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1341 transitions. [2021-10-13 06:46:59,413 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1341 transitions. Word has length 100 [2021-10-13 06:46:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:46:59,415 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1341 transitions. [2021-10-13 06:46:59,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2021-10-13 06:46:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1341 transitions. [2021-10-13 06:46:59,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-13 06:46:59,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:46:59,418 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:46:59,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:59,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:46:59,635 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:46:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:46:59,636 INFO L82 PathProgramCache]: Analyzing trace with hash -517718612, now seen corresponding path program 1 times [2021-10-13 06:46:59,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:46:59,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424143923] [2021-10-13 06:46:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:59,637 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:46:59,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:46:59,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:46:59,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 06:47:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:47:00,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:47:00,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:47:00,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:00,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:00,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:00,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:00,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:00,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:01,251 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:47:01,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:47:01,908 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:47:01,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:47:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 06:47:02,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:47:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 06:47:02,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:47:02,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424143923] [2021-10-13 06:47:02,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424143923] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:47:02,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:47:02,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:47:02,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003106328] [2021-10-13 06:47:02,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:47:02,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:47:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:47:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:47:02,487 INFO L87 Difference]: Start difference. First operand 873 states and 1341 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:47:35,384 INFO L93 Difference]: Finished difference Result 2405 states and 3628 transitions. [2021-10-13 06:47:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:47:35,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-10-13 06:47:35,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:47:35,397 INFO L225 Difference]: With dead ends: 2405 [2021-10-13 06:47:35,397 INFO L226 Difference]: Without dead ends: 1539 [2021-10-13 06:47:35,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:47:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-10-13 06:47:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 931. [2021-10-13 06:47:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 1.5204301075268818) internal successors, (1414), 930 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1414 transitions. [2021-10-13 06:47:35,459 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1414 transitions. Word has length 115 [2021-10-13 06:47:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:47:35,460 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1414 transitions. [2021-10-13 06:47:35,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1414 transitions. [2021-10-13 06:47:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-13 06:47:35,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:47:35,463 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:47:35,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 06:47:35,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:47:35,677 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:47:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:47:35,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1265744566, now seen corresponding path program 1 times [2021-10-13 06:47:35,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:47:35,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903622269] [2021-10-13 06:47:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:47:35,679 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:47:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:47:35,679 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:47:35,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 06:47:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:47:36,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:47:36,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:47:36,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:36,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:36,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:36,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:36,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:36,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:37,211 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:47:37,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:47:37,801 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:47:37,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:47:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 06:47:37,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:47:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 06:47:38,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:47:38,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903622269] [2021-10-13 06:47:38,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903622269] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:47:38,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:47:38,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:47:38,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752072955] [2021-10-13 06:47:38,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:47:38,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:47:38,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:47:38,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:47:38,374 INFO L87 Difference]: Start difference. First operand 931 states and 1414 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:47:57,977 INFO L93 Difference]: Finished difference Result 2578 states and 3869 transitions. [2021-10-13 06:47:57,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:47:57,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-10-13 06:47:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:47:57,989 INFO L225 Difference]: With dead ends: 2578 [2021-10-13 06:47:57,989 INFO L226 Difference]: Without dead ends: 1657 [2021-10-13 06:47:57,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:47:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-10-13 06:47:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1014. [2021-10-13 06:47:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.5024679170779862) internal successors, (1522), 1013 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1522 transitions. [2021-10-13 06:47:58,056 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1522 transitions. Word has length 115 [2021-10-13 06:47:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:47:58,056 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 1522 transitions. [2021-10-13 06:47:58,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:47:58,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1522 transitions. [2021-10-13 06:47:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-13 06:47:58,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:47:58,059 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:47:58,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 06:47:58,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:47:58,285 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:47:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:47:58,285 INFO L82 PathProgramCache]: Analyzing trace with hash -647023955, now seen corresponding path program 1 times [2021-10-13 06:47:58,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:47:58,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464790446] [2021-10-13 06:47:58,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:47:58,286 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:47:58,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:47:58,287 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:47:58,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 06:47:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:47:59,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:47:59,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:47:59,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:47:59,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:59,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:59,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:59,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:59,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:47:59,795 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:47:59,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:48:00,730 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:48:00,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:48:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 06:48:00,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:48:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-13 06:48:01,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:48:01,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464790446] [2021-10-13 06:48:01,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464790446] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:48:01,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:48:01,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:48:01,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158033973] [2021-10-13 06:48:01,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:48:01,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:48:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:48:01,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:48:01,243 INFO L87 Difference]: Start difference. First operand 1014 states and 1522 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:48:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:48:25,664 INFO L93 Difference]: Finished difference Result 2562 states and 3807 transitions. [2021-10-13 06:48:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:48:25,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 115 [2021-10-13 06:48:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:48:25,676 INFO L225 Difference]: With dead ends: 2562 [2021-10-13 06:48:25,676 INFO L226 Difference]: Without dead ends: 1729 [2021-10-13 06:48:25,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:48:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-10-13 06:48:25,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1130. [2021-10-13 06:48:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 1.5022143489813995) internal successors, (1696), 1129 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:48:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1696 transitions. [2021-10-13 06:48:25,746 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1696 transitions. Word has length 115 [2021-10-13 06:48:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:48:25,747 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 1696 transitions. [2021-10-13 06:48:25,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:48:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1696 transitions. [2021-10-13 06:48:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-13 06:48:25,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:48:25,750 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:48:25,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:48:25,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:48:25,966 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:48:25,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:48:25,966 INFO L82 PathProgramCache]: Analyzing trace with hash 336272896, now seen corresponding path program 1 times [2021-10-13 06:48:25,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:48:25,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033473614] [2021-10-13 06:48:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:48:25,971 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:48:25,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:48:25,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:48:25,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 06:48:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:48:27,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:48:27,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:48:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:48:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:48:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:48:27,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:48:27,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:48:27,693 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:48:27,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:48:28,345 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:48:28,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:48:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:48:28,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:48:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:48:28,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:48:28,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033473614] [2021-10-13 06:48:28,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033473614] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:48:28,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:48:28,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:48:28,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536780326] [2021-10-13 06:48:28,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:48:28,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:48:28,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:48:28,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:48:28,891 INFO L87 Difference]: Start difference. First operand 1130 states and 1696 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:48:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:48:49,569 INFO L93 Difference]: Finished difference Result 2873 states and 4263 transitions. [2021-10-13 06:48:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:48:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 117 [2021-10-13 06:48:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:48:49,598 INFO L225 Difference]: With dead ends: 2873 [2021-10-13 06:48:49,598 INFO L226 Difference]: Without dead ends: 1753 [2021-10-13 06:48:49,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:48:49,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-10-13 06:48:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1136. [2021-10-13 06:48:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.4854625550660794) internal successors, (1686), 1135 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:48:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1686 transitions. [2021-10-13 06:48:49,672 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1686 transitions. Word has length 117 [2021-10-13 06:48:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:48:49,672 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1686 transitions. [2021-10-13 06:48:49,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:48:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1686 transitions. [2021-10-13 06:48:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-13 06:48:49,675 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:48:49,675 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:48:49,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:48:49,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:48:49,888 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:48:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:48:49,889 INFO L82 PathProgramCache]: Analyzing trace with hash 475530403, now seen corresponding path program 1 times [2021-10-13 06:48:49,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:48:49,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776207672] [2021-10-13 06:48:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:48:49,890 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:48:49,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:48:49,890 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:48:49,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 06:48:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:48:50,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:48:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:48:51,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:48:51,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:48:51,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:48:51,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:48:51,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:48:51,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:48:51,627 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:48:51,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:48:52,603 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:48:52,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:48:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:48:52,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:48:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:48:53,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:48:53,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776207672] [2021-10-13 06:48:53,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776207672] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:48:53,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:48:53,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:48:53,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725479818] [2021-10-13 06:48:53,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:48:53,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:48:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:48:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:48:53,121 INFO L87 Difference]: Start difference. First operand 1136 states and 1686 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:49:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:49:25,234 INFO L93 Difference]: Finished difference Result 2642 states and 3887 transitions. [2021-10-13 06:49:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:49:25,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 117 [2021-10-13 06:49:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:49:25,248 INFO L225 Difference]: With dead ends: 2642 [2021-10-13 06:49:25,248 INFO L226 Difference]: Without dead ends: 1708 [2021-10-13 06:49:25,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:49:25,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-10-13 06:49:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1152. [2021-10-13 06:49:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.476107732406603) internal successors, (1699), 1151 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:49:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1699 transitions. [2021-10-13 06:49:25,393 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1699 transitions. Word has length 117 [2021-10-13 06:49:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:49:25,393 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1699 transitions. [2021-10-13 06:49:25,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:49:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1699 transitions. [2021-10-13 06:49:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-13 06:49:25,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:49:25,396 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:49:25,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-13 06:49:25,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:49:25,612 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:49:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:49:25,613 INFO L82 PathProgramCache]: Analyzing trace with hash -760085446, now seen corresponding path program 1 times [2021-10-13 06:49:25,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:49:25,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90231638] [2021-10-13 06:49:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:25,614 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:49:25,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:49:25,616 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:49:25,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 06:49:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:49:26,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:49:26,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:49:26,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:26,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:26,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:26,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:26,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:26,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:27,452 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:49:27,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:49:28,192 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:49:28,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:49:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:49:28,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:49:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:49:28,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:49:28,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90231638] [2021-10-13 06:49:28,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90231638] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:49:28,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:49:28,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:49:28,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880397789] [2021-10-13 06:49:28,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:49:28,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:49:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:49:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:49:28,791 INFO L87 Difference]: Start difference. First operand 1152 states and 1699 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:49:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:49:53,686 INFO L93 Difference]: Finished difference Result 2887 states and 4218 transitions. [2021-10-13 06:49:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:49:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 118 [2021-10-13 06:49:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:49:53,697 INFO L225 Difference]: With dead ends: 2887 [2021-10-13 06:49:53,698 INFO L226 Difference]: Without dead ends: 1750 [2021-10-13 06:49:53,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:49:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-10-13 06:49:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1158. [2021-10-13 06:49:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 1.4589455488331893) internal successors, (1688), 1157 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:49:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1688 transitions. [2021-10-13 06:49:53,771 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1688 transitions. Word has length 118 [2021-10-13 06:49:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:49:53,771 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 1688 transitions. [2021-10-13 06:49:53,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:49:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1688 transitions. [2021-10-13 06:49:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-13 06:49:53,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:49:53,775 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:49:53,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 06:49:53,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:49:53,989 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:49:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:49:53,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1579061573, now seen corresponding path program 1 times [2021-10-13 06:49:53,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:49:53,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938194974] [2021-10-13 06:49:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:49:53,990 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:49:53,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:49:53,991 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:49:53,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 06:49:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:49:55,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:49:55,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:49:55,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:49:55,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:55,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:55,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:55,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:55,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:49:55,944 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:49:55,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:49:56,790 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:49:56,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:49:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:49:56,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:49:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:49:57,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:49:57,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938194974] [2021-10-13 06:49:57,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938194974] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:49:57,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:49:57,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:49:57,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091708210] [2021-10-13 06:49:57,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:49:57,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:49:57,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:49:57,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:49:57,385 INFO L87 Difference]: Start difference. First operand 1158 states and 1688 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:50:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:50:19,038 INFO L93 Difference]: Finished difference Result 2812 states and 4076 transitions. [2021-10-13 06:50:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:50:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 119 [2021-10-13 06:50:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:50:19,046 INFO L225 Difference]: With dead ends: 2812 [2021-10-13 06:50:19,046 INFO L226 Difference]: Without dead ends: 1669 [2021-10-13 06:50:19,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:50:19,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-10-13 06:50:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1158. [2021-10-13 06:50:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 1.439066551426102) internal successors, (1665), 1157 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:50:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1665 transitions. [2021-10-13 06:50:19,132 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1665 transitions. Word has length 119 [2021-10-13 06:50:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:50:19,132 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 1665 transitions. [2021-10-13 06:50:19,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:50:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1665 transitions. [2021-10-13 06:50:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-13 06:50:19,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:50:19,136 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:50:19,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 06:50:19,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:50:19,362 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:50:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:50:19,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1069684126, now seen corresponding path program 1 times [2021-10-13 06:50:19,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:50:19,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338909185] [2021-10-13 06:50:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:50:19,364 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:50:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:50:19,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:50:19,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 06:50:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:50:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:50:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:50:20,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:20,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:20,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:20,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:20,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:20,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:21,529 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:50:21,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:50:22,812 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:50:22,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:50:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:50:22,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:50:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:50:23,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:50:23,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338909185] [2021-10-13 06:50:23,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338909185] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:50:23,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:50:23,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:50:23,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538520317] [2021-10-13 06:50:23,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:50:23,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:50:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:50:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:50:23,534 INFO L87 Difference]: Start difference. First operand 1158 states and 1665 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:50:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:50:49,293 INFO L93 Difference]: Finished difference Result 2912 states and 4166 transitions. [2021-10-13 06:50:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:50:49,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 119 [2021-10-13 06:50:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:50:49,305 INFO L225 Difference]: With dead ends: 2912 [2021-10-13 06:50:49,305 INFO L226 Difference]: Without dead ends: 1769 [2021-10-13 06:50:49,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:50:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-10-13 06:50:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1253. [2021-10-13 06:50:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 1.420926517571885) internal successors, (1779), 1252 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:50:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1779 transitions. [2021-10-13 06:50:49,390 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1779 transitions. Word has length 119 [2021-10-13 06:50:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:50:49,390 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 1779 transitions. [2021-10-13 06:50:49,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:50:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1779 transitions. [2021-10-13 06:50:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-13 06:50:49,393 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:50:49,394 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:50:49,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 06:50:49,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:50:49,614 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:50:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:50:49,615 INFO L82 PathProgramCache]: Analyzing trace with hash -672153909, now seen corresponding path program 1 times [2021-10-13 06:50:49,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:50:49,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120610972] [2021-10-13 06:50:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:50:49,616 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:50:49,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:50:49,618 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:50:49,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 06:50:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:50:50,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:50:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:50:51,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:50:51,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:51,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:51,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:51,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:51,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:50:51,582 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:50:51,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:50:52,859 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:50:52,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:50:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:50:52,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:50:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:50:53,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:50:53,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120610972] [2021-10-13 06:50:53,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120610972] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:50:53,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:50:53,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:50:53,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614994161] [2021-10-13 06:50:53,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:50:53,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:50:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:50:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:50:53,386 INFO L87 Difference]: Start difference. First operand 1253 states and 1779 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:51:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:51:20,853 INFO L93 Difference]: Finished difference Result 2966 states and 4210 transitions. [2021-10-13 06:51:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:51:20,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 120 [2021-10-13 06:51:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:51:20,862 INFO L225 Difference]: With dead ends: 2966 [2021-10-13 06:51:20,862 INFO L226 Difference]: Without dead ends: 1728 [2021-10-13 06:51:20,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:51:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-10-13 06:51:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1269. [2021-10-13 06:51:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 1.4195583596214512) internal successors, (1800), 1268 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:51:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1800 transitions. [2021-10-13 06:51:20,944 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1800 transitions. Word has length 120 [2021-10-13 06:51:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:51:20,944 INFO L470 AbstractCegarLoop]: Abstraction has 1269 states and 1800 transitions. [2021-10-13 06:51:20,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:51:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1800 transitions. [2021-10-13 06:51:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-13 06:51:20,948 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:51:20,948 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:51:20,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 06:51:21,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:51:21,163 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:51:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:51:21,164 INFO L82 PathProgramCache]: Analyzing trace with hash 745942391, now seen corresponding path program 1 times [2021-10-13 06:51:21,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:51:21,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245024953] [2021-10-13 06:51:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:51:21,165 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:51:21,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:51:21,165 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:51:21,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 06:51:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:51:22,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:51:22,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:51:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:22,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:51:22,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:51:22,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:51:22,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:51:22,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:51:23,332 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-10-13 06:51:23,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-10-13 06:51:24,513 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-10-13 06:51:24,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-10-13 06:51:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:51:24,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:51:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-13 06:51:25,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:51:25,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245024953] [2021-10-13 06:51:25,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245024953] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:51:25,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:51:25,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:51:25,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530381609] [2021-10-13 06:51:25,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:51:25,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:51:25,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:51:25,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:51:25,076 INFO L87 Difference]: Start difference. First operand 1269 states and 1800 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:51:51,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:51:51,691 INFO L93 Difference]: Finished difference Result 2960 states and 4191 transitions. [2021-10-13 06:51:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:51:51,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 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 120 [2021-10-13 06:51:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:51:51,705 INFO L225 Difference]: With dead ends: 2960 [2021-10-13 06:51:51,705 INFO L226 Difference]: Without dead ends: 1706 [2021-10-13 06:51:51,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:51:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-10-13 06:51:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1269. [2021-10-13 06:51:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 1.4069400630914826) internal successors, (1784), 1268 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:51:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1784 transitions. [2021-10-13 06:51:51,842 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1784 transitions. Word has length 120 [2021-10-13 06:51:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:51:51,843 INFO L470 AbstractCegarLoop]: Abstraction has 1269 states and 1784 transitions. [2021-10-13 06:51:51,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:51:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1784 transitions. [2021-10-13 06:51:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-13 06:51:51,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:51:51,847 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:51:51,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 06:51:52,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:51:52,057 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:51:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:51:52,057 INFO L82 PathProgramCache]: Analyzing trace with hash 787843816, now seen corresponding path program 1 times [2021-10-13 06:51:52,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:51:52,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048238954] [2021-10-13 06:51:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:51:52,058 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:51:52,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:51:52,059 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:51:52,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 06:51:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:51:53,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:51:53,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:51:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:51:53,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:51:53,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:51:53,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:51:53,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:51:53,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:53,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:54,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 69 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 113 [2021-10-13 06:51:56,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:51:56,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:51:56,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 273 treesize of output 221 [2021-10-13 06:52:04,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:04,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 120 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 186 treesize of output 106 [2021-10-13 06:52:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-13 06:52:05,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-10-13 06:52:06,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:52:06,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048238954] [2021-10-13 06:52:06,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048238954] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:06,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:06,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-10-13 06:52:06,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137654074] [2021-10-13 06:52:06,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 06:52:06,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:52:06,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 06:52:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-10-13 06:52:06,123 INFO L87 Difference]: Start difference. First operand 1269 states and 1784 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2021-10-13 06:53:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:53:04,254 INFO L93 Difference]: Finished difference Result 2791 states and 3932 transitions. [2021-10-13 06:53:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 06:53:04,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 123 [2021-10-13 06:53:04,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:53:04,266 INFO L225 Difference]: With dead ends: 2791 [2021-10-13 06:53:04,266 INFO L226 Difference]: Without dead ends: 1736 [2021-10-13 06:53:04,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12482.8ms TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-10-13 06:53:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-10-13 06:53:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1264. [2021-10-13 06:53:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 1.4085510688836105) internal successors, (1779), 1263 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:53:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1779 transitions. [2021-10-13 06:53:04,350 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1779 transitions. Word has length 123 [2021-10-13 06:53:04,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:53:04,350 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1779 transitions. [2021-10-13 06:53:04,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2021-10-13 06:53:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1779 transitions. [2021-10-13 06:53:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-13 06:53:04,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:53:04,354 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:53:04,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:04,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:53:04,577 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:53:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:53:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash -272550210, now seen corresponding path program 1 times [2021-10-13 06:53:04,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:53:04,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865182233] [2021-10-13 06:53:04,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:04,578 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:53:04,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:53:04,579 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:53:04,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 06:53:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 06:53:10,260 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 06:53:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 06:53:14,925 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 06:53:14,926 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 06:53:14,927 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:53:14,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:15,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:53:15,141 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 06:53:15,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:53:15 BoogieIcfgContainer [2021-10-13 06:53:15,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 06:53:15,383 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 06:53:15,383 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 06:53:15,384 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 06:53:15,384 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:21" (3/4) ... [2021-10-13 06:53:15,386 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 06:53:15,510 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 06:53:15,510 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 06:53:15,511 INFO L168 Benchmark]: Toolchain (without parser) took 484893.92 ms. Allocated memory was 58.7 MB in the beginning and 90.2 MB in the end (delta: 31.5 MB). Free memory was 34.9 MB in the beginning and 34.3 MB in the end (delta: 598.8 kB). Peak memory consumption was 46.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:15,511 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 58.7 MB. Free memory is still 40.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:53:15,512 INFO L168 Benchmark]: CACSL2BoogieTranslator took 749.98 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 34.6 MB in the beginning and 39.5 MB in the end (delta: -4.9 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:15,512 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.15 ms. Allocated memory is still 71.3 MB. Free memory was 39.5 MB in the beginning and 34.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:15,513 INFO L168 Benchmark]: Boogie Preprocessor took 137.61 ms. Allocated memory is still 71.3 MB. Free memory was 34.8 MB in the beginning and 47.1 MB in the end (delta: -12.3 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:15,513 INFO L168 Benchmark]: RCFGBuilder took 9765.38 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 47.1 MB in the beginning and 56.2 MB in the end (delta: -9.1 MB). Peak memory consumption was 43.9 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:15,513 INFO L168 Benchmark]: TraceAbstraction took 473997.74 ms. Allocated memory is still 90.2 MB. Free memory was 55.4 MB in the beginning and 31.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 35.6 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:15,514 INFO L168 Benchmark]: Witness Printer took 127.08 ms. Allocated memory is still 90.2 MB. Free memory was 31.3 MB in the beginning and 34.3 MB in the end (delta: -2.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:15,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 58.7 MB. Free memory is still 40.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 749.98 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 34.6 MB in the beginning and 39.5 MB in the end (delta: -4.9 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 110.15 ms. Allocated memory is still 71.3 MB. Free memory was 39.5 MB in the beginning and 34.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 137.61 ms. Allocated memory is still 71.3 MB. Free memory was 34.8 MB in the beginning and 47.1 MB in the end (delta: -12.3 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 9765.38 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 47.1 MB in the beginning and 56.2 MB in the end (delta: -9.1 MB). Peak memory consumption was 43.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 473997.74 ms. Allocated memory is still 90.2 MB. Free memory was 55.4 MB in the beginning and 31.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 35.6 MB. Max. memory is 16.1 GB. * Witness Printer took 127.08 ms. Allocated memory is still 90.2 MB. Free memory was 31.3 MB in the beginning and 34.3 MB in the end (delta: -2.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1658]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1042] static int init = 1; [L1043] static SSL_METHOD SSLv3_client_data ; VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1065] SSL *s ; [L1069] s = malloc (sizeof (SSL)) [L1070] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1071] EXPR s->s3 [L1071] s->s3->flags = __VERIFIER_nondet_long() [L1072] EXPR s->s3 [L1072] (s->s3)->tmp.cert_req = __VERIFIER_nondet_int() [L1073] EXPR s->s3 [L1073] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1074] EXPR s->s3 [L1074] EXPR (s->s3)->tmp.new_cipher [L1074] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1075] EXPR s->s3 [L1075] s->s3->tmp.next_state = __VERIFIER_nondet_int() [L1076] s->bbio = (BIO *) __VERIFIER_nondet_ulong() [L1077] s->wbio = (BIO *) __VERIFIER_nondet_ulong() [L1078] s->ctx = malloc(sizeof(SSL_CTX)) [L1079] EXPR s->ctx [L1079] (s->ctx)->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1080] s->state = 12292 [L1081] s->version = __VERIFIER_nondet_int() [L1082] s->init_buf = (BUF_MEM *)__VERIFIER_nondet_ulong() [L1083] s->info_callback = (void (*)()) __VERIFIER_nondet_ulong() [L1090] BUF_MEM *buf = (BUF_MEM *)__VERIFIER_nondet_ulong(); [L1091] unsigned long tmp ; [L1092] unsigned long l ; [L1093] long num1 ; [L1094] void (*cb)() ; [L1095] int ret ; [L1096] int new_state ; [L1097] int state ; [L1098] int skip ; [L1099] int *tmp___0 ; [L1100] int tmp___1 = __VERIFIER_nondet_int(); [L1101] int tmp___2 = __VERIFIER_nondet_int(); [L1102] int tmp___3 ; [L1103] int tmp___4 ; [L1104] int tmp___5 ; [L1105] int tmp___6 ; [L1106] int tmp___7 ; [L1107] int tmp___8 ; [L1108] long tmp___9 ; [L1110] int blastFlag ; [L1113] blastFlag = 0 [L1114] s->state = 12292 [L1115] s->hit = __VERIFIER_nondet_int() [L1117] tmp = __VERIFIER_nondet_int() [L1118] cb = (void (*)())((void *)0) [L1119] ret = -1 [L1120] skip = 0 [L1121] tmp___0 = (int*)malloc(sizeof(int)) [L1122] *tmp___0 = 0 [L1123] EXPR s->info_callback VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1123] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1124] EXPR s->info_callback [L1124] cb = s->info_callback [L1132] EXPR s->in_handshake [L1132] s->in_handshake += 1 [L1133] COND FALSE !(tmp___1 & 12288) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND TRUE s->state == 12292 [L1249] s->new_session = 1 [L1250] s->state = 4096 [L1251] EXPR s->ctx [L1251] EXPR (s->ctx)->stats.sess_connect_renegotiate [L1251] (s->ctx)->stats.sess_connect_renegotiate += 1 [L1256] s->server = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1257] COND TRUE (unsigned long )cb != (unsigned long )((void *)0) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1262] EXPR s->version VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1262] COND FALSE !((s->version & 65280) != 768) [L1268] s->type = 4096 [L1269] EXPR s->init_buf VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1269] COND FALSE !((unsigned long )s->init_buf == (unsigned long )((void *)0)) [L1281] tmp___4 = __VERIFIER_nondet_int() [L1282] COND FALSE !(! tmp___4) [L1288] tmp___5 = __VERIFIER_nondet_int() [L1289] COND FALSE !(! tmp___5) [L1295] s->state = 4368 [L1296] EXPR s->ctx [L1296] EXPR (s->ctx)->stats.sess_connect [L1296] (s->ctx)->stats.sess_connect += 1 [L1297] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND TRUE s->state == 4368 [L1301] s->shutdown = 0 [L1302] ret = __VERIFIER_nondet_int() [L1303] COND TRUE blastFlag == 0 [L1304] blastFlag = 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1308] COND FALSE !(ret <= 0) [L1313] s->state = 4384 [L1314] s->init_num = 0 [L1315] EXPR s->bbio [L1315] EXPR s->wbio VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1315] COND TRUE (unsigned long )s->bbio != (unsigned long )s->wbio [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND TRUE s->state == 4384 [L1323] ret = __VERIFIER_nondet_int() [L1324] COND TRUE blastFlag == 1 [L1325] blastFlag = 2 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1329] COND FALSE !(ret <= 0) [L1334] s->hit VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1334] COND FALSE !(s->hit) [L1337] s->state = 4400 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1339] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND TRUE s->state == 4400 [L1343] EXPR s->s3 [L1343] EXPR (s->s3)->tmp.new_cipher [L1343] EXPR ((s->s3)->tmp.new_cipher)->algorithms VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1343] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1346] ret = __VERIFIER_nondet_int() [L1347] COND TRUE blastFlag == 2 [L1348] blastFlag = 3 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1352] COND FALSE !(ret <= 0) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1358] s->state = 4416 [L1359] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND TRUE s->state == 4416 [L1363] ret = __VERIFIER_nondet_int() [L1364] COND TRUE blastFlag == 3 [L1365] blastFlag = 4 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1369] COND FALSE !(ret <= 0) [L1374] s->state = 4432 [L1375] s->init_num = 0 [L1376] tmp___6 = __VERIFIER_nondet_int() [L1377] COND FALSE !(! tmp___6) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1185] COND TRUE s->state == 4432 [L1386] ret = __VERIFIER_nondet_int() [L1387] COND FALSE !(blastFlag == 5) VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1392] COND FALSE !(ret <= 0) [L1397] s->state = 4448 [L1398] s->init_num = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] EXPR s->s3 [L1617] EXPR (s->s3)->tmp.reuse_message VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1617] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1646] skip = 0 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1143] COND TRUE 1 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1145] EXPR s->state [L1145] state = s->state [L1146] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1146] COND FALSE !(s->state == 12292) [L1149] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1149] COND FALSE !(s->state == 16384) [L1152] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1152] COND FALSE !(s->state == 4096) [L1155] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1155] COND FALSE !(s->state == 20480) [L1158] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1158] COND FALSE !(s->state == 4099) [L1161] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1161] COND FALSE !(s->state == 4368) [L1164] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1164] COND FALSE !(s->state == 4369) [L1167] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1167] COND FALSE !(s->state == 4384) [L1170] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1170] COND FALSE !(s->state == 4385) [L1173] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1173] COND FALSE !(s->state == 4400) [L1176] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1176] COND FALSE !(s->state == 4401) [L1179] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1179] COND FALSE !(s->state == 4416) [L1182] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1182] COND FALSE !(s->state == 4417) [L1185] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1185] COND FALSE !(s->state == 4432) [L1188] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1188] COND FALSE !(s->state == 4433) [L1191] EXPR s->state VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1191] COND TRUE s->state == 4448 [L1402] ret = __VERIFIER_nondet_int() [L1403] COND TRUE blastFlag == 4 VAL [init=1, SSLv3_client_data={-2147483569:0}] [L1658] reach_error() VAL [init=1, SSLv3_client_data={-2147483569:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 131 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 473684.5ms, OverallIterations: 17, TraceHistogramMax: 7, EmptinessCheckTime: 80.7ms, AutomataDifference: 400919.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2842 SDtfs, 3034 SDslu, 6270 SDs, 0 SdLazy, 5456 SolverSat, 640 SolverUnsat, 46 SolverUnknown, 0 SolverNotchecked, 386027.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3279 GetRequests, 3192 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 15718.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1269occurred in iteration=14, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1179.5ms AutomataMinimizationTime, 16 MinimizatonAttempts, 7138 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 708.8ms SsaConstructionTime, 12707.8ms SatisfiabilityAnalysisTime, 42044.0ms InterpolantComputationTime, 1780 NumberOfCodeBlocks, 1780 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 3254 ConstructedInterpolants, 11 QuantifiedInterpolants, 21028 SizeOfPredicates, 79 NumberOfNonLiveVariables, 4765 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 32 InterpolantComputations, 32 PerfectInterpolantSequences, 4446/4446 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 06:53:15,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beff0a32-38f7-473e-9e85-e409b5046af2/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...