./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF --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 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:38:34,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:38:34,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:38:34,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:38:34,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:38:34,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:38:34,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:38:34,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:38:34,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:38:34,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:38:34,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:38:34,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:38:34,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:38:34,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:38:34,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:38:35,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:38:35,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:38:35,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:38:35,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:38:35,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:38:35,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:38:35,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:38:35,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:38:35,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:38:35,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:38:35,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:38:35,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:38:35,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:38:35,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:38:35,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:38:35,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:38:35,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:38:35,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:38:35,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:38:35,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:38:35,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:38:35,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:38:35,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:38:35,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:38:35,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:38:35,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:38:35,056 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:38:35,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:38:35,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:38:35,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:38:35,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:38:35,092 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:38:35,093 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:38:35,094 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:38:35,094 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:38:35,095 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:38:35,095 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:38:35,095 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:38:35,096 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:38:35,096 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:38:35,097 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:38:35,097 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:38:35,098 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:38:35,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:38:35,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:38:35,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:38:35,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:38:35,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:38:35,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:38:35,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:38:35,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:38:35,103 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:38:35,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:38:35,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:38:35,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:38:35,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:38:35,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:38:35,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:38:35,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:38:35,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:38:35,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:38:35,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:38:35,108 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:38:35,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:38:35,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:38:35,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:38:35,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:38:35,110 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_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df [2021-11-12 23:38:35,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:38:35,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:38:35,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:38:35,445 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:38:35,446 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:38:35,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-12 23:38:35,521 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/data/1e0441b64/e9d324e00fe14b3f80b63324107f12df/FLAGd1e4f91fb [2021-11-12 23:38:36,288 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:38:36,289 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-12 23:38:36,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/data/1e0441b64/e9d324e00fe14b3f80b63324107f12df/FLAGd1e4f91fb [2021-11-12 23:38:36,505 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/data/1e0441b64/e9d324e00fe14b3f80b63324107f12df [2021-11-12 23:38:36,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:38:36,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:38:36,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:36,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:38:36,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:38:36,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:36" (1/1) ... [2021-11-12 23:38:36,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e0be8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:36, skipping insertion in model container [2021-11-12 23:38:36,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:36" (1/1) ... [2021-11-12 23:38:36,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:38:36,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:38:37,230 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_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-12 23:38:37,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:37,282 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:38:37,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39faff46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:37, skipping insertion in model container [2021-11-12 23:38:37,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:37,283 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:38:37,286 INFO L158 Benchmark]: Toolchain (without parser) took 771.40ms. Allocated memory was 104.9MB in the beginning and 134.2MB in the end (delta: 29.4MB). Free memory was 68.6MB in the beginning and 98.6MB in the end (delta: -29.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:38:37,286 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 104.9MB. Free memory is still 57.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:38:37,288 INFO L158 Benchmark]: CACSL2BoogieTranslator took 767.89ms. Allocated memory was 104.9MB in the beginning and 134.2MB in the end (delta: 29.4MB). Free memory was 68.6MB in the beginning and 98.6MB in the end (delta: -29.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:38:37,290 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 104.9MB. Free memory is still 57.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 767.89ms. Allocated memory was 104.9MB in the beginning and 134.2MB in the end (delta: 29.4MB). Free memory was 68.6MB in the beginning and 98.6MB in the end (delta: -29.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF --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 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:38:39,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:38:39,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:38:39,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:38:39,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:38:39,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:38:39,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:38:39,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:38:39,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:38:39,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:38:39,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:38:39,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:38:39,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:38:39,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:38:39,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:38:39,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:38:39,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:38:39,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:38:39,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:38:39,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:38:39,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:38:39,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:38:39,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:38:39,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:38:39,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:38:39,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:38:39,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:38:39,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:38:39,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:38:39,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:38:39,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:38:39,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:38:39,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:38:39,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:38:39,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:38:39,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:38:39,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:38:39,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:38:39,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:38:39,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:38:39,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:38:39,861 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:38:39,893 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:38:39,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:38:39,894 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:38:39,894 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:38:39,895 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:38:39,895 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:38:39,895 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:38:39,895 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:38:39,896 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:38:39,896 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:38:39,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:38:39,897 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:38:39,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:38:39,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:38:39,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:38:39,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:38:39,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:38:39,898 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:38:39,899 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:38:39,899 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:38:39,899 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:38:39,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:38:39,900 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:38:39,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:38:39,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:38:39,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:38:39,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:38:39,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:38:39,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:38:39,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:38:39,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:38:39,904 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:38:39,905 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:38:39,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:38:39,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:38:39,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:38:39,907 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_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df [2021-11-12 23:38:40,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:38:40,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:38:40,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:38:40,395 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:38:40,396 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:38:40,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-12 23:38:40,478 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/data/094ffb2f5/6c1101daeb1147ec93367a2c322884af/FLAG1475de23c [2021-11-12 23:38:41,313 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:38:41,314 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-12 23:38:41,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/data/094ffb2f5/6c1101daeb1147ec93367a2c322884af/FLAG1475de23c [2021-11-12 23:38:41,403 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/data/094ffb2f5/6c1101daeb1147ec93367a2c322884af [2021-11-12 23:38:41,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:38:41,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:38:41,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:41,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:38:41,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:38:41,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:41" (1/1) ... [2021-11-12 23:38:41,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44378679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:41, skipping insertion in model container [2021-11-12 23:38:41,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:38:41" (1/1) ... [2021-11-12 23:38:41,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:38:41,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:38:42,124 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_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-12 23:38:42,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:42,187 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:38:42,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:38:42,395 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_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-12 23:38:42,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:42,416 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:38:42,607 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_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-12 23:38:42,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:38:42,637 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:38:42,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42 WrapperNode [2021-11-12 23:38:42,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:38:42,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:38:42,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:38:42,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:38:42,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (1/1) ... [2021-11-12 23:38:42,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (1/1) ... [2021-11-12 23:38:42,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:38:42,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:38:42,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:38:42,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:38:42,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (1/1) ... [2021-11-12 23:38:42,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (1/1) ... [2021-11-12 23:38:42,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (1/1) ... [2021-11-12 23:38:42,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (1/1) ... [2021-11-12 23:38:42,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (1/1) ... [2021-11-12 23:38:42,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (1/1) ... [2021-11-12 23:38:42,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (1/1) ... [2021-11-12 23:38:42,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:38:42,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:38:42,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:38:42,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:38:42,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (1/1) ... [2021-11-12 23:38:42,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:38:42,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:38:42,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:38:42,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:38:43,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:38:43,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:38:43,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:38:43,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:38:43,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:38:43,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:38:43,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:38:43,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:38:43,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:38:43,275 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:38:53,603 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-12 23:38:53,603 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-12 23:38:53,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:38:53,613 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:38:53,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:38:53 BoogieIcfgContainer [2021-11-12 23:38:53,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:38:53,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:38:53,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:38:53,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:38:53,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:38:41" (1/3) ... [2021-11-12 23:38:53,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32005efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:38:53, skipping insertion in model container [2021-11-12 23:38:53,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:38:42" (2/3) ... [2021-11-12 23:38:53,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32005efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:38:53, skipping insertion in model container [2021-11-12 23:38:53,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:38:53" (3/3) ... [2021-11-12 23:38:53,626 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.13.i.cil-1.c [2021-11-12 23:38:53,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:38:53,632 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:38:53,684 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:38:53,692 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:38:53,692 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:38:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-12 23:38:53,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:53,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:53,727 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-11-12 23:38:53,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:53,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405846539] [2021-11-12 23:38:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:53,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:53,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:53,757 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:53,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:38:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:54,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:54,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:38:54,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:38:54,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:54,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405846539] [2021-11-12 23:38:54,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405846539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:54,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:54,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:38:54,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548250254] [2021-11-12 23:38:54,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:54,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:54,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:54,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:54,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:54,738 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:55,047 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-12 23:38:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:55,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-12 23:38:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:55,074 INFO L225 Difference]: With dead ends: 566 [2021-11-12 23:38:55,074 INFO L226 Difference]: Without dead ends: 387 [2021-11-12 23:38:55,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:55,097 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 402 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.91ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:55,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 670 Invalid, 76 Unknown, 0 Unchecked, 17.91ms Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 162.37ms Time] [2021-11-12 23:38:55,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-12 23:38:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-12 23:38:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-12 23:38:55,225 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-12 23:38:55,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:55,226 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-12 23:38:55,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-12 23:38:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:38:55,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:55,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:55,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:55,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:55,455 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:55,456 INFO L85 PathProgramCache]: Analyzing trace with hash 457194935, now seen corresponding path program 1 times [2021-11-12 23:38:55,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:55,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435112633] [2021-11-12 23:38:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:55,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:55,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:55,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:55,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:38:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:55,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:55,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:38:55,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:38:56,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:56,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435112633] [2021-11-12 23:38:56,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435112633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:56,222 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:56,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:38:56,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451471101] [2021-11-12 23:38:56,223 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:56,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:56,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:56,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:56,226 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:56,651 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-12 23:38:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:56,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 23:38:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:56,660 INFO L225 Difference]: With dead ends: 882 [2021-11-12 23:38:56,660 INFO L226 Difference]: Without dead ends: 631 [2021-11-12 23:38:56,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:56,664 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 305 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 337.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.36ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 379.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:56,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 722 Invalid, 79 Unknown, 0 Unchecked, 5.36ms Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 379.44ms Time] [2021-11-12 23:38:56,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-12 23:38:56,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-12 23:38:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5222929936305734) internal successors, (956), 628 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-12 23:38:56,728 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-12 23:38:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:56,728 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-12 23:38:56,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-12 23:38:56,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:38:56,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:56,753 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:56,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:56,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:56,966 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash 335691035, now seen corresponding path program 1 times [2021-11-12 23:38:56,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:56,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147026995] [2021-11-12 23:38:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:56,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:56,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:56,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:57,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:38:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:57,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:38:57,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:38:58,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:58,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147026995] [2021-11-12 23:38:58,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147026995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:58,222 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:58,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:38:58,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441974300] [2021-11-12 23:38:58,223 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:58,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:38:58,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:38:58,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:58,225 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:59,413 INFO L93 Difference]: Finished difference Result 1370 states and 2096 transitions. [2021-11-12 23:38:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:38:59,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 112 [2021-11-12 23:38:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:59,428 INFO L225 Difference]: With dead ends: 1370 [2021-11-12 23:38:59,428 INFO L226 Difference]: Without dead ends: 875 [2021-11-12 23:38:59,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:38:59,436 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 303 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1090.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.84ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1136.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:59,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 730 Invalid, 79 Unknown, 0 Unchecked, 3.84ms Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 1136.14ms Time] [2021-11-12 23:38:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-12 23:38:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2021-11-12 23:38:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.5183066361556063) internal successors, (1327), 874 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1327 transitions. [2021-11-12 23:38:59,512 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1327 transitions. Word has length 112 [2021-11-12 23:38:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:59,512 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1327 transitions. [2021-11-12 23:38:59,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1327 transitions. [2021-11-12 23:38:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 23:38:59,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:59,523 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:38:59,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:59,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:59,741 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:59,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1891434834, now seen corresponding path program 1 times [2021-11-12 23:38:59,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:59,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422178748] [2021-11-12 23:38:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:59,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:59,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:59,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:59,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:39:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:00,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:39:00,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:39:00,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:39:01,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:01,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422178748] [2021-11-12 23:39:01,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422178748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:01,004 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:01,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:39:01,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834142986] [2021-11-12 23:39:01,005 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:01,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:39:01,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:39:01,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:39:01,007 INFO L87 Difference]: Start difference. First operand 875 states and 1327 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:39:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:02,151 INFO L93 Difference]: Finished difference Result 1863 states and 2837 transitions. [2021-11-12 23:39:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:39:02,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 141 [2021-11-12 23:39:02,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:02,161 INFO L225 Difference]: With dead ends: 1863 [2021-11-12 23:39:02,162 INFO L226 Difference]: Without dead ends: 1122 [2021-11-12 23:39:02,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:39:02,165 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 310 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1045.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.56ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1082.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:02,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 728 Invalid, 75 Unknown, 0 Unchecked, 3.56ms Time], IncrementalHoareTripleChecker [19 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1082.43ms Time] [2021-11-12 23:39:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-12 23:39:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-11-12 23:39:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.5138269402319358) internal successors, (1697), 1121 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:39:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1697 transitions. [2021-11-12 23:39:02,225 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1697 transitions. Word has length 141 [2021-11-12 23:39:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:02,226 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1697 transitions. [2021-11-12 23:39:02,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:39:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1697 transitions. [2021-11-12 23:39:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 23:39:02,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:02,231 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:02,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:02,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:02,439 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash -490932893, now seen corresponding path program 1 times [2021-11-12 23:39:02,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:02,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37228949] [2021-11-12 23:39:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:02,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:02,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:02,443 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:02,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:39:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:39:03,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:03,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:39:03,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:39:03,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:03,605 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 23:39:03,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-12 23:39:04,143 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-12 23:39:04,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 601 treesize of output 573 [2021-11-12 23:39:04,256 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-12 23:39:04,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 23:39:04,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:04,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 23:39:04,285 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:04,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 23:39:04,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-12 23:39:04,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-12 23:39:04,628 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-12 23:39:04,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 23:39:04,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:04,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 23:39:04,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-12 23:39:04,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-12 23:39:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-12 23:39:05,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:05,769 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:05,776 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-12 23:39:05,782 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:05,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 23:39:05,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:05,976 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-12 23:39:05,984 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:05,987 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-12 23:39:05,998 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:06,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-12 23:39:06,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:06,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-12 23:39:06,045 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:06,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-12 23:39:06,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:39:06,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-12 23:39:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-12 23:39:06,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:06,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37228949] [2021-11-12 23:39:06,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37228949] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:06,656 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:06,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:39:06,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759681575] [2021-11-12 23:39:06,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:06,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:39:06,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:06,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:39:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:39:06,659 INFO L87 Difference]: Start difference. First operand 1122 states and 1697 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:39:08,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:10,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:12,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:17,414 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:23,199 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:24,310 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:27,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:29,260 INFO L93 Difference]: Finished difference Result 2241 states and 3390 transitions. [2021-11-12 23:39:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:39:29,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-12 23:39:29,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:29,270 INFO L225 Difference]: With dead ends: 2241 [2021-11-12 23:39:29,271 INFO L226 Difference]: Without dead ends: 1122 [2021-11-12 23:39:29,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:39:29,274 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21990.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 22459.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:29,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 931 Invalid, 328 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 3 Unknown, 58 Unchecked, 22459.33ms Time] [2021-11-12 23:39:29,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-12 23:39:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-11-12 23:39:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.512934879571811) internal successors, (1696), 1121 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) [2021-11-12 23:39:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1696 transitions. [2021-11-12 23:39:29,325 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1696 transitions. Word has length 165 [2021-11-12 23:39:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:29,325 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1696 transitions. [2021-11-12 23:39:29,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:39:29,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1696 transitions. [2021-11-12 23:39:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 23:39:29,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:29,330 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:39:29,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:29,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:29,546 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:29,547 INFO L85 PathProgramCache]: Analyzing trace with hash 7623909, now seen corresponding path program 1 times [2021-11-12 23:39:29,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:29,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262143748] [2021-11-12 23:39:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:29,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:29,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:29,549 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:29,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:39:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:30,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:30,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:30,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:30,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:30,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:30,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:30,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:30,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:39:30,678 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:39:30,679 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 [2021-11-12 23:39:30,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:39:30,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:39:30,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:39:31,208 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:39:31,209 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 [2021-11-12 23:39:32,751 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:39:32,752 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 [2021-11-12 23:39:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-12 23:39:33,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-12 23:39:33,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:33,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262143748] [2021-11-12 23:39:33,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262143748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:33,648 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:33,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:39:33,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363522475] [2021-11-12 23:39:33,649 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:33,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:39:33,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:33,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:39:33,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:39:33,651 INFO L87 Difference]: Start difference. First operand 1122 states and 1696 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:39:35,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:37,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:39,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:42,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:49,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:55,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:58,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:04,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:07,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:24,233 INFO L93 Difference]: Finished difference Result 4230 states and 6420 transitions. [2021-11-12 23:40:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:40:24,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-12 23:40:24,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:24,254 INFO L225 Difference]: With dead ends: 4230 [2021-11-12 23:40:24,255 INFO L226 Difference]: Without dead ends: 3118 [2021-11-12 23:40:24,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:24,259 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 267 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 74 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49135.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.98ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50338.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:24,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 898 Invalid, 909 Unknown, 0 Unchecked, 11.98ms Time], IncrementalHoareTripleChecker [74 Valid, 832 Invalid, 3 Unknown, 0 Unchecked, 50338.76ms Time] [2021-11-12 23:40:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-11-12 23:40:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 1346. [2021-11-12 23:40:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 1.5479553903345724) internal successors, (2082), 1345 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 2082 transitions. [2021-11-12 23:40:24,373 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 2082 transitions. Word has length 165 [2021-11-12 23:40:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:24,374 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 2082 transitions. [2021-11-12 23:40:24,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 2082 transitions. [2021-11-12 23:40:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 23:40:24,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:24,379 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:24,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:24,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:24,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:24,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:24,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2042784989, now seen corresponding path program 1 times [2021-11-12 23:40:24,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:24,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510253722] [2021-11-12 23:40:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:24,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:24,601 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:24,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:40:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:25,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:40:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:25,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:25,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:25,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:25,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:25,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:25,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:25,897 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:40:25,898 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 [2021-11-12 23:40:27,513 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:40:27,513 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 [2021-11-12 23:40:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:40:27,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:40:28,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:28,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510253722] [2021-11-12 23:40:28,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510253722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:28,208 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:28,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:40:28,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817465738] [2021-11-12 23:40:28,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:28,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:40:28,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:28,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:40:28,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:40:28,210 INFO L87 Difference]: Start difference. First operand 1346 states and 2082 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:30,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:32,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:35,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:38,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:40,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:46,124 INFO L93 Difference]: Finished difference Result 3254 states and 5034 transitions. [2021-11-12 23:40:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:40:46,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-12 23:40:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:46,144 INFO L225 Difference]: With dead ends: 3254 [2021-11-12 23:40:46,144 INFO L226 Difference]: Without dead ends: 1918 [2021-11-12 23:40:46,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 324 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:40:46,148 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 110 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17303.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.04ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17741.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:46,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 615 Invalid, 240 Unknown, 0 Unchecked, 4.04ms Time], IncrementalHoareTripleChecker [18 Valid, 220 Invalid, 2 Unknown, 0 Unchecked, 17741.39ms Time] [2021-11-12 23:40:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-12 23:40:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1598. [2021-11-12 23:40:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 1.5798371947401377) internal successors, (2523), 1597 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2523 transitions. [2021-11-12 23:40:46,266 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2523 transitions. Word has length 165 [2021-11-12 23:40:46,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:46,266 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 2523 transitions. [2021-11-12 23:40:46,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2523 transitions. [2021-11-12 23:40:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-12 23:40:46,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:46,272 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:46,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 23:40:46,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:46,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:46,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1123899760, now seen corresponding path program 1 times [2021-11-12 23:40:46,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:46,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523112869] [2021-11-12 23:40:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:46,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:46,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:46,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:46,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:40:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:47,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:40:47,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:47,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:47,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:47,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:47,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:47,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:47,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:48,110 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:40:48,110 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 [2021-11-12 23:40:48,817 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:40:48,818 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 [2021-11-12 23:40:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:40:49,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:40:49,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:49,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523112869] [2021-11-12 23:40:49,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523112869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:49,560 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:49,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:40:49,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799339623] [2021-11-12 23:40:49,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:49,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:40:49,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:49,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:40:49,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:40:49,563 INFO L87 Difference]: Start difference. First operand 1598 states and 2523 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:51,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:55,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:56,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:03,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:13,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:23,396 INFO L93 Difference]: Finished difference Result 4766 states and 7445 transitions. [2021-11-12 23:41:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:41:23,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 178 [2021-11-12 23:41:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:23,424 INFO L225 Difference]: With dead ends: 4766 [2021-11-12 23:41:23,425 INFO L226 Difference]: Without dead ends: 3178 [2021-11-12 23:41:23,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:41:23,428 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 214 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32811.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.96ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33595.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:23,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 567 Invalid, 552 Unknown, 0 Unchecked, 6.96ms Time], IncrementalHoareTripleChecker [69 Valid, 482 Invalid, 1 Unknown, 0 Unchecked, 33595.07ms Time] [2021-11-12 23:41:23,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-11-12 23:41:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 1886. [2021-11-12 23:41:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 1.5819628647214854) internal successors, (2982), 1885 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2982 transitions. [2021-11-12 23:41:23,550 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2982 transitions. Word has length 178 [2021-11-12 23:41:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:23,551 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 2982 transitions. [2021-11-12 23:41:23,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2982 transitions. [2021-11-12 23:41:23,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:41:23,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:23,557 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:23,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:23,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:23,779 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1047988863, now seen corresponding path program 1 times [2021-11-12 23:41:23,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:23,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77568570] [2021-11-12 23:41:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:23,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:23,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:23,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:23,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:41:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:24,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:41:24,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:25,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:25,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:25,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:25,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:25,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:25,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:25,395 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:41:25,397 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 [2021-11-12 23:41:25,816 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:41:25,817 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 [2021-11-12 23:41:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:41:26,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:41:26,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:26,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77568570] [2021-11-12 23:41:26,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77568570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:26,412 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:26,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:41:26,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947437612] [2021-11-12 23:41:26,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:26,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:41:26,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:26,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:41:26,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:41:26,414 INFO L87 Difference]: Start difference. First operand 1886 states and 2982 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:41:28,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:30,456 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:34,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:40,760 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:45,152 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:47,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:51,349 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:52,933 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:59,948 INFO L93 Difference]: Finished difference Result 4964 states and 7724 transitions. [2021-11-12 23:41:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:41:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 179 [2021-11-12 23:41:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:59,963 INFO L225 Difference]: With dead ends: 4964 [2021-11-12 23:41:59,963 INFO L226 Difference]: Without dead ends: 3088 [2021-11-12 23:41:59,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:41:59,967 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 223 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 69 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32519.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.97ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33259.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:59,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 529 Invalid, 543 Unknown, 0 Unchecked, 5.97ms Time], IncrementalHoareTripleChecker [69 Valid, 471 Invalid, 3 Unknown, 0 Unchecked, 33259.41ms Time] [2021-11-12 23:41:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-11-12 23:42:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 1886. [2021-11-12 23:42:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 1.5628647214854112) internal successors, (2946), 1885 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2946 transitions. [2021-11-12 23:42:00,102 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2946 transitions. Word has length 179 [2021-11-12 23:42:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:00,102 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 2946 transitions. [2021-11-12 23:42:00,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2946 transitions. [2021-11-12 23:42:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:42:00,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:00,108 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:00,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:00,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:00,326 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:00,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:00,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1895629075, now seen corresponding path program 1 times [2021-11-12 23:42:00,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:00,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964523028] [2021-11-12 23:42:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:00,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:00,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:00,329 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:00,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:42:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:42:01,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:01,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:01,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:01,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:01,746 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:42:01,746 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 [2021-11-12 23:42:02,196 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:42:02,196 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 [2021-11-12 23:42:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:42:02,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:42:02,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:02,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964523028] [2021-11-12 23:42:02,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964523028] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:02,854 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:02,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:42:02,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204017463] [2021-11-12 23:42:02,855 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:02,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:42:02,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:02,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:42:02,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:42:02,856 INFO L87 Difference]: Start difference. First operand 1886 states and 2946 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:04,880 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:06,888 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:10,248 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:12,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:14,811 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:21,396 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:25,989 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:30,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:32,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:45,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:46,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:47,680 INFO L93 Difference]: Finished difference Result 5180 states and 8012 transitions. [2021-11-12 23:42:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:42:47,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 179 [2021-11-12 23:42:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:47,698 INFO L225 Difference]: With dead ends: 5180 [2021-11-12 23:42:47,699 INFO L226 Difference]: Without dead ends: 3304 [2021-11-12 23:42:47,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:42:47,702 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 219 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 65 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43619.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.91ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44564.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:47,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 781 Invalid, 689 Unknown, 0 Unchecked, 4.91ms Time], IncrementalHoareTripleChecker [65 Valid, 620 Invalid, 4 Unknown, 0 Unchecked, 44564.54ms Time] [2021-11-12 23:42:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-11-12 23:42:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 1994. [2021-11-12 23:42:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 1.5413948820873056) internal successors, (3072), 1993 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 3072 transitions. [2021-11-12 23:42:47,860 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 3072 transitions. Word has length 179 [2021-11-12 23:42:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:47,861 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 3072 transitions. [2021-11-12 23:42:47,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 3072 transitions. [2021-11-12 23:42:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:42:47,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:47,868 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:47,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:48,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:48,082 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:48,082 INFO L85 PathProgramCache]: Analyzing trace with hash -892296342, now seen corresponding path program 1 times [2021-11-12 23:42:48,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:48,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962038279] [2021-11-12 23:42:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:48,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:48,086 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:48,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:42:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:48,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:42:48,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:49,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:49,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:49,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:49,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:49,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:49,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:49,424 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:42:49,424 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 [2021-11-12 23:42:50,279 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:42:50,280 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 [2021-11-12 23:42:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:42:50,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:42:50,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:50,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962038279] [2021-11-12 23:42:50,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962038279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:50,889 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:50,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:42:50,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690685424] [2021-11-12 23:42:50,890 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:50,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:42:50,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:50,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:42:50,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:42:50,891 INFO L87 Difference]: Start difference. First operand 1994 states and 3072 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:52,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:56,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:57,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:59,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:05,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:07,301 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:15,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:24,492 INFO L93 Difference]: Finished difference Result 5162 states and 7886 transitions. [2021-11-12 23:43:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:43:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 179 [2021-11-12 23:43:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:24,506 INFO L225 Difference]: With dead ends: 5162 [2021-11-12 23:43:24,506 INFO L226 Difference]: Without dead ends: 3178 [2021-11-12 23:43:24,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:43:24,520 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 206 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32620.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.41ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33366.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:24,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 524 Invalid, 530 Unknown, 0 Unchecked, 3.41ms Time], IncrementalHoareTripleChecker [68 Valid, 461 Invalid, 1 Unknown, 0 Unchecked, 33366.31ms Time] [2021-11-12 23:43:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-11-12 23:43:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2012. [2021-11-12 23:43:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 1.5320735952262556) internal successors, (3081), 2011 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 3081 transitions. [2021-11-12 23:43:24,661 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 3081 transitions. Word has length 179 [2021-11-12 23:43:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:24,661 INFO L470 AbstractCegarLoop]: Abstraction has 2012 states and 3081 transitions. [2021-11-12 23:43:24,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 3081 transitions. [2021-11-12 23:43:24,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:43:24,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:24,668 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:24,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:24,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:24,882 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:24,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1478052906, now seen corresponding path program 1 times [2021-11-12 23:43:24,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:24,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907724346] [2021-11-12 23:43:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:24,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:24,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:24,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:24,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:43:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:43:25,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:25,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:25,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:43:25,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:43:25,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:43:25,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:43:25,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:43:26,356 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:43:26,357 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 [2021-11-12 23:43:27,094 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:43:27,094 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 [2021-11-12 23:43:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:43:27,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:43:27,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:27,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907724346] [2021-11-12 23:43:27,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907724346] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:27,678 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:27,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:43:27,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689169712] [2021-11-12 23:43:27,678 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:27,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:43:27,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:27,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:43:27,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:43:27,680 INFO L87 Difference]: Start difference. First operand 2012 states and 3081 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:29,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:34,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:38,069 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:39,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:43,981 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:48,902 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:57,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:57,954 INFO L93 Difference]: Finished difference Result 5300 states and 8054 transitions. [2021-11-12 23:43:57,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:43:57,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 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 179 [2021-11-12 23:43:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:57,975 INFO L225 Difference]: With dead ends: 5300 [2021-11-12 23:43:57,975 INFO L226 Difference]: Without dead ends: 3298 [2021-11-12 23:43:57,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:43:57,980 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 206 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29285.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.51ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29983.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:57,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 521 Invalid, 520 Unknown, 0 Unchecked, 3.51ms Time], IncrementalHoareTripleChecker [65 Valid, 453 Invalid, 2 Unknown, 0 Unchecked, 29983.15ms Time] [2021-11-12 23:43:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2021-11-12 23:43:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 2148. [2021-11-12 23:43:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2148 states, 2147 states have (on average 1.5197950628784351) internal successors, (3263), 2147 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 3263 transitions. [2021-11-12 23:43:58,198 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 3263 transitions. Word has length 179 [2021-11-12 23:43:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:58,199 INFO L470 AbstractCegarLoop]: Abstraction has 2148 states and 3263 transitions. [2021-11-12 23:43:58,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 3263 transitions. [2021-11-12 23:43:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-12 23:43:58,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:58,206 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:58,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:58,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:58,422 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:58,422 INFO L85 PathProgramCache]: Analyzing trace with hash -704993927, now seen corresponding path program 1 times [2021-11-12 23:43:58,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:58,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929969090] [2021-11-12 23:43:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:58,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:58,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:58,427 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:58,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:43:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:59,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:43:59,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:59,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:43:59,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:43:59,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:43:59,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:43:59,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:43:59,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:43:59,857 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:43:59,857 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 [2021-11-12 23:44:00,346 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:44:00,346 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 [2021-11-12 23:44:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:44:00,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:44:00,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:00,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929969090] [2021-11-12 23:44:00,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929969090] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:00,947 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:44:00,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:44:00,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299310637] [2021-11-12 23:44:00,947 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:00,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:44:00,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:00,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:44:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:44:00,949 INFO L87 Difference]: Start difference. First operand 2148 states and 3263 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:02,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:13,769 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:29,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:31,056 INFO L93 Difference]: Finished difference Result 5542 states and 8394 transitions. [2021-11-12 23:44:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 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 180 [2021-11-12 23:44:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:31,066 INFO L225 Difference]: With dead ends: 5542 [2021-11-12 23:44:31,067 INFO L226 Difference]: Without dead ends: 3404 [2021-11-12 23:44:31,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:44:31,069 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 212 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28957.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.09ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29826.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:31,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 749 Invalid, 657 Unknown, 0 Unchecked, 4.09ms Time], IncrementalHoareTripleChecker [63 Valid, 593 Invalid, 1 Unknown, 0 Unchecked, 29826.39ms Time] [2021-11-12 23:44:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2021-11-12 23:44:31,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 2157. [2021-11-12 23:44:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 1.50139146567718) internal successors, (3237), 2156 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3237 transitions. [2021-11-12 23:44:31,235 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3237 transitions. Word has length 180 [2021-11-12 23:44:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:31,235 INFO L470 AbstractCegarLoop]: Abstraction has 2157 states and 3237 transitions. [2021-11-12 23:44:31,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3237 transitions. [2021-11-12 23:44:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-12 23:44:31,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:31,242 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:31,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:31,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:31,456 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:31,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:31,456 INFO L85 PathProgramCache]: Analyzing trace with hash 320365464, now seen corresponding path program 1 times [2021-11-12 23:44:31,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:31,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733404922] [2021-11-12 23:44:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:31,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:31,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:31,458 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:31,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:44:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:32,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:44:32,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:32,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:44:32,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:44:32,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:44:32,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:44:32,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:44:32,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:44:33,044 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:44:33,044 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 [2021-11-12 23:44:33,547 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:44:33,548 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 [2021-11-12 23:44:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:44:33,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:44:34,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:34,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733404922] [2021-11-12 23:44:34,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733404922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:34,149 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:44:34,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:44:34,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184368959] [2021-11-12 23:44:34,149 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:34,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:44:34,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:44:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:44:34,150 INFO L87 Difference]: Start difference. First operand 2157 states and 3237 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:36,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:43,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:44:47,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:00,151 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:00,361 INFO L93 Difference]: Finished difference Result 5553 states and 8320 transitions. [2021-11-12 23:45:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 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 181 [2021-11-12 23:45:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:00,368 INFO L225 Difference]: With dead ends: 5553 [2021-11-12 23:45:00,369 INFO L226 Difference]: Without dead ends: 3406 [2021-11-12 23:45:00,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:45:00,372 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 207 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25234.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.41ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25919.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:00,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 564 Invalid, 513 Unknown, 0 Unchecked, 3.41ms Time], IncrementalHoareTripleChecker [61 Valid, 450 Invalid, 2 Unknown, 0 Unchecked, 25919.71ms Time] [2021-11-12 23:45:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2021-11-12 23:45:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 2166. [2021-11-12 23:45:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 1.48729792147806) internal successors, (3220), 2165 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:45:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 3220 transitions. [2021-11-12 23:45:00,547 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 3220 transitions. Word has length 181 [2021-11-12 23:45:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:00,547 INFO L470 AbstractCegarLoop]: Abstraction has 2166 states and 3220 transitions. [2021-11-12 23:45:00,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:45:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 3220 transitions. [2021-11-12 23:45:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-12 23:45:00,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:00,556 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:00,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:00,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:00,770 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2082029342, now seen corresponding path program 1 times [2021-11-12 23:45:00,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:00,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836738046] [2021-11-12 23:45:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:00,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:00,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:00,774 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:00,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:45:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:01,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:02,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:02,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:02,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:02,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:02,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:02,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:02,533 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:45:02,534 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 [2021-11-12 23:45:03,181 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:45:03,182 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 [2021-11-12 23:45:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:45:03,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:45:03,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:03,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836738046] [2021-11-12 23:45:03,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836738046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:03,831 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:03,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:45:03,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89625498] [2021-11-12 23:45:03,831 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:03,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:45:03,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:03,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:45:03,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:03,833 INFO L87 Difference]: Start difference. First operand 2166 states and 3220 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:45:05,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:07,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:11,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:19,184 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:23,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:25,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:34,007 INFO L93 Difference]: Finished difference Result 5380 states and 8011 transitions. [2021-11-12 23:45:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:34,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 182 [2021-11-12 23:45:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:34,014 INFO L225 Difference]: With dead ends: 5380 [2021-11-12 23:45:34,014 INFO L226 Difference]: Without dead ends: 3224 [2021-11-12 23:45:34,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:45:34,016 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 200 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29191.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.44ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29883.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:34,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 548 Invalid, 517 Unknown, 0 Unchecked, 3.44ms Time], IncrementalHoareTripleChecker [61 Valid, 453 Invalid, 3 Unknown, 0 Unchecked, 29883.22ms Time] [2021-11-12 23:45:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3224 states. [2021-11-12 23:45:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3224 to 2166. [2021-11-12 23:45:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 1.466974595842956) internal successors, (3176), 2165 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:45:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 3176 transitions. [2021-11-12 23:45:34,159 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 3176 transitions. Word has length 182 [2021-11-12 23:45:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:34,160 INFO L470 AbstractCegarLoop]: Abstraction has 2166 states and 3176 transitions. [2021-11-12 23:45:34,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:45:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 3176 transitions. [2021-11-12 23:45:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-12 23:45:34,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:34,166 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:45:34,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:34,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:34,382 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:34,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:34,382 INFO L85 PathProgramCache]: Analyzing trace with hash 51593096, now seen corresponding path program 1 times [2021-11-12 23:45:34,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:34,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741959356] [2021-11-12 23:45:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:34,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:34,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:34,385 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:34,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:45:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:35,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:35,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:35,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:35,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:35,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:35,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:35,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:35,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:35,861 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:45:35,862 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 [2021-11-12 23:45:36,794 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:45:36,794 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 [2021-11-12 23:45:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:45:36,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:45:37,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:37,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741959356] [2021-11-12 23:45:37,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741959356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:37,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:37,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:45:37,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897498981] [2021-11-12 23:45:37,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:37,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:45:37,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:45:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:37,463 INFO L87 Difference]: Start difference. First operand 2166 states and 3176 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:45:39,486 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:40,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:43,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:46,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:49,037 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:45:51,980 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:00,005 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:02,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:07,097 INFO L93 Difference]: Finished difference Result 5356 states and 7880 transitions. [2021-11-12 23:46:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:07,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 182 [2021-11-12 23:46:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:07,104 INFO L225 Difference]: With dead ends: 5356 [2021-11-12 23:46:07,104 INFO L226 Difference]: Without dead ends: 3440 [2021-11-12 23:46:07,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:46:07,107 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 182 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28573.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29327.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:07,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 806 Invalid, 499 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [42 Valid, 456 Invalid, 1 Unknown, 0 Unchecked, 29327.38ms Time] [2021-11-12 23:46:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-11-12 23:46:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2346. [2021-11-12 23:46:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 1.4464818763326226) internal successors, (3392), 2345 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:46:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3392 transitions. [2021-11-12 23:46:07,311 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3392 transitions. Word has length 182 [2021-11-12 23:46:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:07,312 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 3392 transitions. [2021-11-12 23:46:07,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:46:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3392 transitions. [2021-11-12 23:46:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-12 23:46:07,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:07,317 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:07,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:07,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:07,526 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:07,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:07,526 INFO L85 PathProgramCache]: Analyzing trace with hash 525669319, now seen corresponding path program 1 times [2021-11-12 23:46:07,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:07,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333058298] [2021-11-12 23:46:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:07,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:07,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:07,529 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:07,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:46:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:08,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:46:08,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:08,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:08,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:08,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:08,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:08,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:08,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:09,054 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:46:09,054 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 [2021-11-12 23:46:10,037 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:46:10,037 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 [2021-11-12 23:46:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:46:10,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:46:10,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:10,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333058298] [2021-11-12 23:46:10,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333058298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:10,647 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:46:10,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:46:10,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360068326] [2021-11-12 23:46:10,648 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:10,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:46:10,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:10,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:46:10,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:46:10,649 INFO L87 Difference]: Start difference. First operand 2346 states and 3392 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:46:12,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:22,191 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:25,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:28,047 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:29,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:40,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:42,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:47,048 INFO L93 Difference]: Finished difference Result 5538 states and 8063 transitions. [2021-11-12 23:46:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:47,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 183 [2021-11-12 23:46:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:47,055 INFO L225 Difference]: With dead ends: 5538 [2021-11-12 23:46:47,055 INFO L226 Difference]: Without dead ends: 3462 [2021-11-12 23:46:47,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:46:47,058 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 186 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35305.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.83ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36109.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:47,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 697 Invalid, 632 Unknown, 0 Unchecked, 3.83ms Time], IncrementalHoareTripleChecker [57 Valid, 573 Invalid, 2 Unknown, 0 Unchecked, 36109.63ms Time] [2021-11-12 23:46:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-11-12 23:46:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 2390. [2021-11-12 23:46:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 1.4349100041858518) internal successors, (3428), 2389 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:46:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 3428 transitions. [2021-11-12 23:46:47,236 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 3428 transitions. Word has length 183 [2021-11-12 23:46:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:47,237 INFO L470 AbstractCegarLoop]: Abstraction has 2390 states and 3428 transitions. [2021-11-12 23:46:47,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:46:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 3428 transitions. [2021-11-12 23:46:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 23:46:47,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:47,241 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:46:47,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:47,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:47,459 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash -81246291, now seen corresponding path program 1 times [2021-11-12 23:46:47,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:47,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563758305] [2021-11-12 23:46:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:47,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:47,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:47,462 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:47,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:46:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:48,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:46:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:48,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:48,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:48,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:48,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:48,787 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:46:48,787 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 [2021-11-12 23:46:49,725 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:46:49,726 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 [2021-11-12 23:46:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:46:49,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:46:50,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:50,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563758305] [2021-11-12 23:46:50,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563758305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:50,325 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:46:50,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:46:50,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154612024] [2021-11-12 23:46:50,325 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:50,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:46:50,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:50,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:46:50,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:46:50,327 INFO L87 Difference]: Start difference. First operand 2390 states and 3428 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:46:52,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:59,876 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:01,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:05,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:08,525 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:18,645 INFO L93 Difference]: Finished difference Result 5734 states and 8278 transitions. [2021-11-12 23:47:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:47:18,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 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 184 [2021-11-12 23:47:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:18,654 INFO L225 Difference]: With dead ends: 5734 [2021-11-12 23:47:18,654 INFO L226 Difference]: Without dead ends: 3629 [2021-11-12 23:47:18,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:47:18,657 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 182 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27422.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.01ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28034.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:18,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 522 Invalid, 496 Unknown, 0 Unchecked, 3.01ms Time], IncrementalHoareTripleChecker [58 Valid, 437 Invalid, 1 Unknown, 0 Unchecked, 28034.84ms Time] [2021-11-12 23:47:18,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2021-11-12 23:47:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 2597. [2021-11-12 23:47:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 1.4175654853620956) internal successors, (3680), 2596 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3680 transitions. [2021-11-12 23:47:18,864 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3680 transitions. Word has length 184 [2021-11-12 23:47:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:18,865 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 3680 transitions. [2021-11-12 23:47:18,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3680 transitions. [2021-11-12 23:47:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-12 23:47:18,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:18,869 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:18,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:19,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:19,089 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:19,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1756566683, now seen corresponding path program 1 times [2021-11-12 23:47:19,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:19,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333259591] [2021-11-12 23:47:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:19,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:19,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:19,091 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:19,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:47:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:19,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:47:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:19,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:19,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:19,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:19,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:19,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:19,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:20,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:20,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:20,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:20,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:20,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:20,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:20,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:47:20,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:47:20,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:47:20,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:47:20,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:47:20,332 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:47:20,332 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 [2021-11-12 23:47:21,353 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:47:21,354 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 [2021-11-12 23:47:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:47:21,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:47:22,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:22,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333259591] [2021-11-12 23:47:22,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333259591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:22,041 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:22,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:47:22,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226329067] [2021-11-12 23:47:22,042 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:22,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:47:22,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:47:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:47:22,043 INFO L87 Difference]: Start difference. First operand 2597 states and 3680 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:24,070 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:35,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:38,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:40,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:47,207 INFO L93 Difference]: Finished difference Result 6370 states and 9082 transitions. [2021-11-12 23:47:47,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:47:47,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 187 [2021-11-12 23:47:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:47,214 INFO L225 Difference]: With dead ends: 6370 [2021-11-12 23:47:47,214 INFO L226 Difference]: Without dead ends: 3794 [2021-11-12 23:47:47,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:47:47,217 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 179 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24211.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.13ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24828.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:47,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 577 Invalid, 512 Unknown, 0 Unchecked, 3.13ms Time], IncrementalHoareTripleChecker [58 Valid, 453 Invalid, 1 Unknown, 0 Unchecked, 24828.57ms Time] [2021-11-12 23:47:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2021-11-12 23:47:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2782. [2021-11-12 23:47:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2781 states have (on average 1.4005753326141677) internal successors, (3895), 2781 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 3895 transitions. [2021-11-12 23:47:47,431 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 3895 transitions. Word has length 187 [2021-11-12 23:47:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:47,431 INFO L470 AbstractCegarLoop]: Abstraction has 2782 states and 3895 transitions. [2021-11-12 23:47:47,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 3895 transitions. [2021-11-12 23:47:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 23:47:47,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:47,436 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:47:47,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:47,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:47,650 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:47,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1708017185, now seen corresponding path program 1 times [2021-11-12 23:47:47,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:47,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911726625] [2021-11-12 23:47:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:47,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:47,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:47,653 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:47,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:47:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:48,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:47:48,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:48,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:47:48,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:47:48,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:47:48,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:47:48,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:47:48,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:47:49,016 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:47:49,016 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 [2021-11-12 23:47:50,131 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:47:50,131 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 [2021-11-12 23:47:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:47:50,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:47:50,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:50,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911726625] [2021-11-12 23:47:50,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911726625] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:50,757 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:50,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:47:50,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525986547] [2021-11-12 23:47:50,758 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:50,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:47:50,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:47:50,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:47:50,759 INFO L87 Difference]: Start difference. First operand 2782 states and 3895 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:47:52,780 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:58,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:02,257 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:04,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:07,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:17,275 INFO L93 Difference]: Finished difference Result 6501 states and 9194 transitions. [2021-11-12 23:48:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:48:17,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 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 188 [2021-11-12 23:48:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:17,281 INFO L225 Difference]: With dead ends: 6501 [2021-11-12 23:48:17,281 INFO L226 Difference]: Without dead ends: 3740 [2021-11-12 23:48:17,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:48:17,301 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 172 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25567.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.05ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26169.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:17,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 516 Invalid, 490 Unknown, 0 Unchecked, 3.05ms Time], IncrementalHoareTripleChecker [60 Valid, 429 Invalid, 1 Unknown, 0 Unchecked, 26169.38ms Time] [2021-11-12 23:48:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2021-11-12 23:48:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 2791. [2021-11-12 23:48:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 1.392831541218638) internal successors, (3886), 2790 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 3886 transitions. [2021-11-12 23:48:17,540 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 3886 transitions. Word has length 188 [2021-11-12 23:48:17,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:17,540 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 3886 transitions. [2021-11-12 23:48:17,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 3886 transitions. [2021-11-12 23:48:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 23:48:17,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:17,543 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:48:17,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:17,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:17,744 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:48:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:17,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1435725805, now seen corresponding path program 1 times [2021-11-12 23:48:17,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:17,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176222091] [2021-11-12 23:48:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:17,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:17,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:17,747 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:17,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:48:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:18,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:48:18,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:18,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:18,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:48:18,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:48:18,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:48:18,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:48:18,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:48:19,101 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:48:19,102 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 [2021-11-12 23:48:20,356 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:48:20,357 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 [2021-11-12 23:48:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:48:20,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:48:20,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:20,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176222091] [2021-11-12 23:48:20,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176222091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:20,974 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:48:20,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:48:20,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137196097] [2021-11-12 23:48:20,975 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:20,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:48:20,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:20,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:48:20,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:48:20,979 INFO L87 Difference]: Start difference. First operand 2791 states and 3886 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:23,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:30,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:32,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:34,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:39,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:41,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:49,835 INFO L93 Difference]: Finished difference Result 6682 states and 9361 transitions. [2021-11-12 23:48:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:48:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 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 188 [2021-11-12 23:48:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:49,842 INFO L225 Difference]: With dead ends: 6682 [2021-11-12 23:48:49,842 INFO L226 Difference]: Without dead ends: 3912 [2021-11-12 23:48:49,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:48:49,846 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 160 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27859.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.02ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28474.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:49,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 522 Invalid, 494 Unknown, 0 Unchecked, 3.02ms Time], IncrementalHoareTripleChecker [58 Valid, 434 Invalid, 2 Unknown, 0 Unchecked, 28474.98ms Time] [2021-11-12 23:48:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2021-11-12 23:48:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 3025. [2021-11-12 23:48:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 1.3773148148148149) internal successors, (4165), 3024 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4165 transitions. [2021-11-12 23:48:50,159 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4165 transitions. Word has length 188 [2021-11-12 23:48:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:50,174 INFO L470 AbstractCegarLoop]: Abstraction has 3025 states and 4165 transitions. [2021-11-12 23:48:50,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:48:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4165 transitions. [2021-11-12 23:48:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 23:48:50,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:50,194 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:48:50,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:50,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:50,413 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:48:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash -904229234, now seen corresponding path program 1 times [2021-11-12 23:48:50,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:50,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326643102] [2021-11-12 23:48:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:50,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:50,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:50,415 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:50,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881cd9b7-b5f0-4c3c-9dd6-48e4d8bbe9ff/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:48:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:51,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:48:51,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:51,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 138 [2021-11-12 23:48:51,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 90 [2021-11-12 23:48:51,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:48:51,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:48:51,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:48:51,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:48:51,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:48:51,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:48:51,437 INFO L190 IndexEqualityManager]: detected not equals via solver