./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs --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 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:21:50,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:21:50,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:21:51,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:21:51,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:21:51,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:21:51,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:21:51,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:21:51,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:21:51,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:21:51,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:21:51,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:21:51,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:21:51,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:21:51,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:21:51,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:21:51,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:21:51,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:21:51,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:21:51,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:21:51,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:21:51,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:21:51,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:21:51,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:21:51,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:21:51,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:21:51,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:21:51,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:21:51,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:21:51,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:21:51,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:21:51,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:21:51,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:21:51,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:21:51,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:21:51,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:21:51,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:21:51,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:21:51,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:21:51,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:21:51,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:21:51,095 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:21:51,143 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:21:51,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:21:51,145 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:21:51,145 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:21:51,146 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:21:51,146 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:21:51,146 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:21:51,146 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:21:51,153 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:21:51,153 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:21:51,155 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:21:51,155 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:21:51,155 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:21:51,155 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:21:51,156 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:21:51,156 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:21:51,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:21:51,158 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:21:51,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:21:51,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:21:51,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:21:51,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:21:51,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:21:51,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:21:51,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:21:51,160 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:21:51,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:21:51,160 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:21:51,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:21:51,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:21:51,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:21:51,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:21:51,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:21:51,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:21:51,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:21:51,172 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:21:51,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:21:51,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:21:51,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:21:51,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:21:51,173 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_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2021-11-19 13:21:51,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:21:51,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:21:51,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:21:51,541 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:21:51,542 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:21:51,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-19 13:21:51,624 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/data/f32926f79/4ba6477fdab94ae99a9d9d71613316cf/FLAGb8b9adaa4 [2021-11-19 13:21:52,307 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:21:52,308 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-19 13:21:52,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/data/f32926f79/4ba6477fdab94ae99a9d9d71613316cf/FLAGb8b9adaa4 [2021-11-19 13:21:52,522 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/data/f32926f79/4ba6477fdab94ae99a9d9d71613316cf [2021-11-19 13:21:52,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:21:52,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:21:52,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:21:52,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:21:52,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:21:52,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:21:52" (1/1) ... [2021-11-19 13:21:52,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e780fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:52, skipping insertion in model container [2021-11-19 13:21:52,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:21:52" (1/1) ... [2021-11-19 13:21:52,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:21:52,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:21:53,162 WARN L230 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_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-19 13:21:53,184 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:21:53,200 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) [2021-11-19 13:21:53,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@519b0fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:53, skipping insertion in model container [2021-11-19 13:21:53,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:21:53,202 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:21:53,204 INFO L158 Benchmark]: Toolchain (without parser) took 674.48ms. Allocated memory is still 96.5MB. Free memory was 52.1MB in the beginning and 62.0MB in the end (delta: -9.9MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2021-11-19 13:21:53,206 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 96.5MB. Free memory was 71.1MB in the beginning and 71.1MB in the end (delta: 50.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:21:53,207 INFO L158 Benchmark]: CACSL2BoogieTranslator took 667.11ms. Allocated memory is still 96.5MB. Free memory was 51.9MB in the beginning and 62.2MB in the end (delta: -10.3MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2021-11-19 13:21:53,209 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 96.5MB. Free memory was 71.1MB in the beginning and 71.1MB in the end (delta: 50.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 667.11ms. Allocated memory is still 96.5MB. Free memory was 51.9MB in the beginning and 62.2MB in the end (delta: -10.3MB). Peak memory consumption was 4.9MB. 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_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs --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 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:21:55,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:21:55,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:21:55,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:21:55,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:21:55,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:21:55,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:21:55,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:21:55,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:21:55,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:21:55,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:21:55,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:21:55,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:21:55,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:21:55,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:21:55,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:21:55,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:21:55,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:21:55,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:21:55,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:21:55,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:21:55,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:21:55,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:21:55,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:21:55,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:21:55,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:21:55,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:21:55,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:21:55,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:21:55,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:21:55,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:21:55,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:21:55,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:21:55,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:21:55,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:21:55,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:21:55,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:21:55,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:21:55,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:21:55,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:21:55,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:21:55,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:21:55,906 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:21:55,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:21:55,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:21:55,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:21:55,909 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:21:55,909 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:21:55,910 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:21:55,910 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:21:55,910 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:21:55,910 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:21:55,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:21:55,913 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:21:55,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:21:55,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:21:55,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:21:55,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:21:55,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:21:55,915 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:21:55,915 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:21:55,915 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:21:55,915 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:21:55,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:21:55,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:21:55,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:21:55,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:21:55,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:21:55,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:21:55,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:21:55,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:21:55,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:21:55,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:21:55,918 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:21:55,918 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:21:55,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:21:55,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:21:55,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:21:55,919 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_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2021-11-19 13:21:56,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:21:56,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:21:56,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:21:56,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:21:56,420 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:21:56,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-19 13:21:56,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/data/9166166d5/216304175f424d178455a41f0d890c0c/FLAGeeaa4fa86 [2021-11-19 13:21:57,404 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:21:57,404 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-19 13:21:57,430 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/data/9166166d5/216304175f424d178455a41f0d890c0c/FLAGeeaa4fa86 [2021-11-19 13:21:57,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/data/9166166d5/216304175f424d178455a41f0d890c0c [2021-11-19 13:21:57,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:21:57,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:21:57,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:21:57,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:21:57,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:21:57,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:21:57" (1/1) ... [2021-11-19 13:21:57,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@312a48d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:57, skipping insertion in model container [2021-11-19 13:21:57,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:21:57" (1/1) ... [2021-11-19 13:21:57,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:21:57,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:21:57,984 WARN L230 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_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-19 13:21:58,007 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:21:58,032 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:21:58,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:21:58,207 WARN L230 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_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-19 13:21:58,210 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:21:58,230 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:21:58,376 WARN L230 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_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-19 13:21:58,379 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:21:58,406 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:21:58,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58 WrapperNode [2021-11-19 13:21:58,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:21:58,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:21:58,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:21:58,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:21:58,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (1/1) ... [2021-11-19 13:21:58,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (1/1) ... [2021-11-19 13:21:58,557 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 768 [2021-11-19 13:21:58,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:21:58,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:21:58,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:21:58,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:21:58,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (1/1) ... [2021-11-19 13:21:58,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (1/1) ... [2021-11-19 13:21:58,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (1/1) ... [2021-11-19 13:21:58,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (1/1) ... [2021-11-19 13:21:58,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (1/1) ... [2021-11-19 13:21:58,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (1/1) ... [2021-11-19 13:21:58,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (1/1) ... [2021-11-19 13:21:58,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:21:58,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:21:58,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:21:58,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:21:58,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (1/1) ... [2021-11-19 13:21:58,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:21:58,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:21:58,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:21:58,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:21:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:21:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:21:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:21:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:21:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:21:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:21:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:21:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:21:58,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:21:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:21:59,013 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:21:59,015 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:21:59,038 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 13:22:08,594 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 13:22:08,594 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 13:22:08,594 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:22:08,609 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:22:08,610 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:22:08,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:22:08 BoogieIcfgContainer [2021-11-19 13:22:08,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:22:08,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:22:08,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:22:08,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:22:08,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:21:57" (1/3) ... [2021-11-19 13:22:08,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e1d62d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:22:08, skipping insertion in model container [2021-11-19 13:22:08,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:58" (2/3) ... [2021-11-19 13:22:08,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e1d62d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:22:08, skipping insertion in model container [2021-11-19 13:22:08,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:22:08" (3/3) ... [2021-11-19 13:22:08,623 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-1.c [2021-11-19 13:22:08,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:22:08,632 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:22:08,677 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:22:08,684 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 [2021-11-19 13:22:08,685 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:22:08,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 13:22:08,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:08,720 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:08,720 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:08,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1630857892, now seen corresponding path program 1 times [2021-11-19 13:22:08,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:08,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741268329] [2021-11-19 13:22:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:08,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:08,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:08,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:08,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:22:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:09,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:22:09,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:09,315 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 [2021-11-19 13:22:09,328 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 [2021-11-19 13:22:09,466 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:09,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 13:22:09,495 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:09,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 13:22:09,533 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 [2021-11-19 13:22:10,091 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-19 13:22:10,092 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 1289 treesize of output 1241 [2021-11-19 13:22:10,231 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:10,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 13:22:10,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:10,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 13:22:10,263 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 [2021-11-19 13:22:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,417 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 [2021-11-19 13:22:10,552 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 13:22:10,552 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 [2021-11-19 13:22:10,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:10,594 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 [2021-11-19 13:22:10,643 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 [2021-11-19 13:22:10,648 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 [2021-11-19 13:22:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:10,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:10,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:10,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-19 13:22:11,004 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:11,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-19 13:22:11,174 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:11,177 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 13:22:11,184 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:11,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-19 13:22:11,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:11,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-19 13:22:11,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:11,222 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-19 13:22:11,245 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:11,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-19 13:22:11,276 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:22:11,281 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-19 13:22:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:11,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:11,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741268329] [2021-11-19 13:22:11,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741268329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:11,810 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:11,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 13:22:11,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780947052] [2021-11-19 13:22:11,813 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:11,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:22:11,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:11,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:22:11,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:22:11,867 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:13,915 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 [] [2021-11-19 13:22:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:20,295 INFO L93 Difference]: Finished difference Result 307 states and 519 transitions. [2021-11-19 13:22:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:22:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-19 13:22:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:20,310 INFO L225 Difference]: With dead ends: 307 [2021-11-19 13:22:20,310 INFO L226 Difference]: Without dead ends: 140 [2021-11-19 13:22:20,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:22:20,318 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 16 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:20,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 849 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 1 Unknown, 65 Unchecked, 8.3s Time] [2021-11-19 13:22:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-19 13:22:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-19 13:22:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.5467625899280575) internal successors, (215), 139 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 215 transitions. [2021-11-19 13:22:20,369 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 215 transitions. Word has length 45 [2021-11-19 13:22:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:20,369 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 215 transitions. [2021-11-19 13:22:20,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 215 transitions. [2021-11-19 13:22:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 13:22:20,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:20,373 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:20,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:22:20,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:22:20,591 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1766716126, now seen corresponding path program 1 times [2021-11-19 13:22:20,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:20,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214774322] [2021-11-19 13:22:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:20,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:20,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:20,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:20,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:22:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:21,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:22:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:21,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:21,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:21,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:21,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:22:21,718 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 13:22:21,719 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 80 treesize of output 78 [2021-11-19 13:22:25,280 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 13:22:25,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-19 13:22:33,434 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 13:22:33,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-19 13:22:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:33,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:22:41,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:41,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214774322] [2021-11-19 13:22:41,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214774322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:41,901 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:41,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-19 13:22:41,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846824089] [2021-11-19 13:22:41,902 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:41,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:22:41,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:22:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-19 13:22:41,905 INFO L87 Difference]: Start difference. First operand 140 states and 215 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:43,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:48,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:50,723 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 [] [2021-11-19 13:22:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:51,412 INFO L93 Difference]: Finished difference Result 285 states and 441 transitions. [2021-11-19 13:22:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:22:51,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-19 13:22:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:51,416 INFO L225 Difference]: With dead ends: 285 [2021-11-19 13:22:51,416 INFO L226 Difference]: Without dead ends: 155 [2021-11-19 13:22:51,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-19 13:22:51,419 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 15 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:51,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 720 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 1 Unknown, 192 Unchecked, 9.5s Time] [2021-11-19 13:22:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-19 13:22:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-11-19 13:22:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.56) internal successors, (234), 150 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 234 transitions. [2021-11-19 13:22:51,437 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 234 transitions. Word has length 45 [2021-11-19 13:22:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:51,437 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 234 transitions. [2021-11-19 13:22:51,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 234 transitions. [2021-11-19 13:22:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 13:22:51,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:51,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:51,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 13:22:51,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:22:51,651 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1817968786, now seen corresponding path program 1 times [2021-11-19 13:22:51,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:51,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244948772] [2021-11-19 13:22:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:51,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:51,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:51,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:51,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:22:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:52,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:22:52,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:52,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:52,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:52,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:52,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:52,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:52,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:22:52,825 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 13:22:52,825 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 80 treesize of output 78 [2021-11-19 13:22:56,214 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 13:22:56,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-19 13:23:03,767 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 13:23:03,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-19 13:23:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:03,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:04,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:04,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244948772] [2021-11-19 13:23:04,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244948772] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:04,302 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:04,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:23:04,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899998307] [2021-11-19 13:23:04,303 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:04,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:23:04,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:23:04,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:23:04,305 INFO L87 Difference]: Start difference. First operand 151 states and 234 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:06,336 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 [] [2021-11-19 13:23:10,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:10,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:10,188 INFO L93 Difference]: Finished difference Result 301 states and 467 transitions. [2021-11-19 13:23:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:23:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-19 13:23:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:10,192 INFO L225 Difference]: With dead ends: 301 [2021-11-19 13:23:10,193 INFO L226 Difference]: Without dead ends: 171 [2021-11-19 13:23:10,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:23:10,195 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 38 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:10,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 646 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 84 Invalid, 1 Unknown, 136 Unchecked, 5.9s Time] [2021-11-19 13:23:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-19 13:23:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2021-11-19 13:23:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5602409638554218) internal successors, (259), 166 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 259 transitions. [2021-11-19 13:23:10,213 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 259 transitions. Word has length 58 [2021-11-19 13:23:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:10,213 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 259 transitions. [2021-11-19 13:23:10,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 259 transitions. [2021-11-19 13:23:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 13:23:10,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:10,218 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:23:10,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:10,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:10,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:10,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:10,435 INFO L85 PathProgramCache]: Analyzing trace with hash 329403111, now seen corresponding path program 1 times [2021-11-19 13:23:10,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:10,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033515029] [2021-11-19 13:23:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:10,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:10,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:10,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:10,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:23:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:11,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:11,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:11,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:11,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:11,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:11,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:11,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:11,593 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 13:23:11,594 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 80 treesize of output 78 [2021-11-19 13:23:15,010 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 13:23:15,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-19 13:23:21,728 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 13:23:21,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-19 13:23:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:21,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:22,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:22,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033515029] [2021-11-19 13:23:22,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033515029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:22,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:22,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:23:22,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197308529] [2021-11-19 13:23:22,271 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:22,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:23:22,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:22,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:23:22,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:23:22,273 INFO L87 Difference]: Start difference. First operand 167 states and 259 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:24,297 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 [] [2021-11-19 13:23:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:27,725 INFO L93 Difference]: Finished difference Result 324 states and 504 transitions. [2021-11-19 13:23:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:23:27,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-19 13:23:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:27,731 INFO L225 Difference]: With dead ends: 324 [2021-11-19 13:23:27,731 INFO L226 Difference]: Without dead ends: 178 [2021-11-19 13:23:27,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:23:27,733 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 20 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:27,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 726 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 89 Invalid, 1 Unknown, 204 Unchecked, 5.4s Time] [2021-11-19 13:23:27,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-19 13:23:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-19 13:23:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5423728813559323) internal successors, (273), 177 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 273 transitions. [2021-11-19 13:23:27,750 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 273 transitions. Word has length 59 [2021-11-19 13:23:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:27,750 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 273 transitions. [2021-11-19 13:23:27,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 273 transitions. [2021-11-19 13:23:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 13:23:27,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:27,754 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:23:27,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:27,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:27,966 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2078660741, now seen corresponding path program 1 times [2021-11-19 13:23:27,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:27,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829808923] [2021-11-19 13:23:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:27,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:27,969 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:27,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:23:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:28,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:28,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:28,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:28,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:28,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:28,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:28,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:28,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:28,927 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 13:23:28,927 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 80 treesize of output 78 [2021-11-19 13:23:32,275 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 13:23:32,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-19 13:23:39,185 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 13:23:39,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-19 13:23:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:39,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:39,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:39,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829808923] [2021-11-19 13:23:39,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829808923] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:39,718 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:39,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:23:39,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100690629] [2021-11-19 13:23:39,719 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:39,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:23:39,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:39,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:23:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:23:39,721 INFO L87 Difference]: Start difference. First operand 178 states and 273 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:41,743 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 [] [2021-11-19 13:23:45,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:45,322 INFO L93 Difference]: Finished difference Result 348 states and 536 transitions. [2021-11-19 13:23:45,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:23:45,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-19 13:23:45,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:45,326 INFO L225 Difference]: With dead ends: 348 [2021-11-19 13:23:45,326 INFO L226 Difference]: Without dead ends: 191 [2021-11-19 13:23:45,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:23:45,327 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 20 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:45,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 925 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 100 Invalid, 1 Unknown, 203 Unchecked, 5.6s Time] [2021-11-19 13:23:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-19 13:23:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-19 13:23:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5263157894736843) internal successors, (290), 190 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 290 transitions. [2021-11-19 13:23:45,342 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 290 transitions. Word has length 59 [2021-11-19 13:23:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:45,343 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 290 transitions. [2021-11-19 13:23:45,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 290 transitions. [2021-11-19 13:23:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 13:23:45,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:45,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:45,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:45,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:45,560 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1364189778, now seen corresponding path program 1 times [2021-11-19 13:23:45,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:45,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832814605] [2021-11-19 13:23:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:45,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:45,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:45,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:45,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:23:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:46,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:46,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:46,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:46,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:46,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:46,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:46,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:46,498 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 13:23:46,499 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 80 treesize of output 78 [2021-11-19 13:23:49,905 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 13:23:49,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-19 13:23:57,401 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 13:23:57,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-19 13:23:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:57,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:23:57,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:57,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832814605] [2021-11-19 13:23:57,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832814605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:57,861 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:57,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:23:57,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81298028] [2021-11-19 13:23:57,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:57,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:23:57,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:57,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:23:57,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:23:57,862 INFO L87 Difference]: Start difference. First operand 191 states and 290 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:58,479 INFO L93 Difference]: Finished difference Result 363 states and 553 transitions. [2021-11-19 13:23:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:23:58,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-19 13:23:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:58,484 INFO L225 Difference]: With dead ends: 363 [2021-11-19 13:23:58,484 INFO L226 Difference]: Without dead ends: 193 [2021-11-19 13:23:58,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:23:58,489 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 18 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:58,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 618 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 101 Unchecked, 0.6s Time] [2021-11-19 13:23:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-19 13:23:58,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2021-11-19 13:23:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5210526315789474) internal successors, (289), 190 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2021-11-19 13:23:58,511 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 59 [2021-11-19 13:23:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:58,511 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2021-11-19 13:23:58,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2021-11-19 13:23:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 13:23:58,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:58,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:58,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:58,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:58,732 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:58,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash -639030510, now seen corresponding path program 1 times [2021-11-19 13:23:58,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:58,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500404710] [2021-11-19 13:23:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:58,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:58,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:58,734 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:58,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:23:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:59,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:59,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:59,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:59,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:59,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:59,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:59,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:59,766 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 13:23:59,767 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 80 treesize of output 78 [2021-11-19 13:24:03,076 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 13:24:03,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-19 13:24:10,461 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 13:24:10,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-19 13:24:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:10,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:10,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:10,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500404710] [2021-11-19 13:24:10,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500404710] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:10,901 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:10,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:24:10,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451446688] [2021-11-19 13:24:10,901 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:10,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:24:10,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:24:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:24:10,902 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:12,412 INFO L93 Difference]: Finished difference Result 362 states and 551 transitions. [2021-11-19 13:24:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:24:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-19 13:24:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:12,415 INFO L225 Difference]: With dead ends: 362 [2021-11-19 13:24:12,415 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 13:24:12,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:24:12,417 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 16 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:12,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 823 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 101 Unchecked, 1.5s Time] [2021-11-19 13:24:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 13:24:12,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-11-19 13:24:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5157894736842106) internal successors, (288), 190 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 288 transitions. [2021-11-19 13:24:12,428 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 288 transitions. Word has length 59 [2021-11-19 13:24:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:12,429 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 288 transitions. [2021-11-19 13:24:12,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 288 transitions. [2021-11-19 13:24:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 13:24:12,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:12,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:12,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:12,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:12,650 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -623672389, now seen corresponding path program 1 times [2021-11-19 13:24:12,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:12,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649691092] [2021-11-19 13:24:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:12,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:12,652 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:12,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:24:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:13,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:24:13,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:13,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:13,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:13,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:24:13,565 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 13:24:13,566 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 80 treesize of output 78 [2021-11-19 13:24:16,823 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 13:24:16,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-19 13:24:23,677 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 13:24:23,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-19 13:24:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:23,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:24,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:24,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649691092] [2021-11-19 13:24:24,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649691092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:24,197 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:24,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:24:24,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040645551] [2021-11-19 13:24:24,198 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:24,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:24:24,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:24,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:24:24,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:24:24,199 INFO L87 Difference]: Start difference. First operand 191 states and 288 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:26,227 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 [] [2021-11-19 13:24:28,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:29,159 INFO L93 Difference]: Finished difference Result 373 states and 566 transitions. [2021-11-19 13:24:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:24:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-19 13:24:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:29,163 INFO L225 Difference]: With dead ends: 373 [2021-11-19 13:24:29,163 INFO L226 Difference]: Without dead ends: 203 [2021-11-19 13:24:29,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:24:29,165 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 26 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:29,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 538 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 1 Unknown, 36 Unchecked, 4.9s Time] [2021-11-19 13:24:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-19 13:24:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 193. [2021-11-19 13:24:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.5052083333333333) internal successors, (289), 192 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 289 transitions. [2021-11-19 13:24:29,175 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 289 transitions. Word has length 60 [2021-11-19 13:24:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:29,176 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 289 transitions. [2021-11-19 13:24:29,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2021-11-19 13:24:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 13:24:29,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:29,178 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:24:29,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:29,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:29,399 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1498911040, now seen corresponding path program 1 times [2021-11-19 13:24:29,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:29,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494004104] [2021-11-19 13:24:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:29,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:29,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:29,401 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:29,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:24:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:24:29,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:29,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:29,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:29,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:29,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:29,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:24:30,334 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 13:24:30,335 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 80 treesize of output 78 [2021-11-19 13:24:33,645 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 13:24:33,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-19 13:24:40,741 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 13:24:40,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-19 13:24:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:40,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:41,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:41,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494004104] [2021-11-19 13:24:41,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494004104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:41,192 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:41,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:24:41,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307229842] [2021-11-19 13:24:41,193 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:41,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:24:41,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:41,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:24:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:24:41,194 INFO L87 Difference]: Start difference. First operand 193 states and 289 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:43,221 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 [] [2021-11-19 13:24:46,003 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 [] [2021-11-19 13:24:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:47,138 INFO L93 Difference]: Finished difference Result 380 states and 574 transitions. [2021-11-19 13:24:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:24:47,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-19 13:24:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:47,143 INFO L225 Difference]: With dead ends: 380 [2021-11-19 13:24:47,143 INFO L226 Difference]: Without dead ends: 208 [2021-11-19 13:24:47,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:24:47,144 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 21 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:47,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 624 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 87 Invalid, 2 Unknown, 128 Unchecked, 5.9s Time] [2021-11-19 13:24:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-19 13:24:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-11-19 13:24:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.4879227053140096) internal successors, (308), 207 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 308 transitions. [2021-11-19 13:24:47,156 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 308 transitions. Word has length 61 [2021-11-19 13:24:47,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:47,156 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 308 transitions. [2021-11-19 13:24:47,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 308 transitions. [2021-11-19 13:24:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 13:24:47,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:47,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:47,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:47,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:47,374 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:47,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1596742752, now seen corresponding path program 1 times [2021-11-19 13:24:47,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:47,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852165577] [2021-11-19 13:24:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:47,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:47,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:47,377 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:47,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:24:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:47,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:24:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:47,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:47,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:47,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:47,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:47,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:47,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:24:48,252 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 13:24:48,253 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 80 treesize of output 78 [2021-11-19 13:24:51,454 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 13:24:51,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-19 13:24:58,618 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 13:24:58,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-19 13:24:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:58,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:24:59,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:59,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852165577] [2021-11-19 13:24:59,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852165577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:59,166 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:59,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:24:59,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956739304] [2021-11-19 13:24:59,167 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:59,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:24:59,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:59,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:24:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:24:59,168 INFO L87 Difference]: Start difference. First operand 208 states and 308 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:01,188 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 [] [2021-11-19 13:25:05,277 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:07,083 INFO L93 Difference]: Finished difference Result 406 states and 606 transitions. [2021-11-19 13:25:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:25:07,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-19 13:25:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:07,093 INFO L225 Difference]: With dead ends: 406 [2021-11-19 13:25:07,093 INFO L226 Difference]: Without dead ends: 219 [2021-11-19 13:25:07,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 13:25:07,094 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 33 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:07,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 840 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 118 Invalid, 1 Unknown, 146 Unchecked, 7.9s Time] [2021-11-19 13:25:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-19 13:25:07,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 209. [2021-11-19 13:25:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.4759615384615385) internal successors, (307), 208 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 307 transitions. [2021-11-19 13:25:07,105 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 307 transitions. Word has length 62 [2021-11-19 13:25:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:07,105 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 307 transitions. [2021-11-19 13:25:07,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 307 transitions. [2021-11-19 13:25:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 13:25:07,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:07,107 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, 1, 1] [2021-11-19 13:25:07,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:07,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:07,318 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:07,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2086351112, now seen corresponding path program 1 times [2021-11-19 13:25:07,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:07,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474791375] [2021-11-19 13:25:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:07,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:07,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:07,320 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:07,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:25:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:07,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:25:07,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:07,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:07,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:07,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:07,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:07,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:08,108 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:25:08,109 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 [2021-11-19 13:25:09,234 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:25:09,234 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 [2021-11-19 13:25:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:25:09,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:25:09,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:09,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474791375] [2021-11-19 13:25:09,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474791375] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:09,573 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:09,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:25:09,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483612365] [2021-11-19 13:25:09,573 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:09,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:25:09,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:25:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:25:09,574 INFO L87 Difference]: Start difference. First operand 209 states and 307 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:11,598 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 [] [2021-11-19 13:25:14,543 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:16,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:19,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:21,047 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:22,110 INFO L93 Difference]: Finished difference Result 429 states and 636 transitions. [2021-11-19 13:25:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:25:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-19 13:25:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:22,120 INFO L225 Difference]: With dead ends: 429 [2021-11-19 13:25:22,120 INFO L226 Difference]: Without dead ends: 241 [2021-11-19 13:25:22,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:25:22,122 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 42 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:22,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 523 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 12.4s Time] [2021-11-19 13:25:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-19 13:25:22,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2021-11-19 13:25:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.4739130434782608) internal successors, (339), 230 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 339 transitions. [2021-11-19 13:25:22,135 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 339 transitions. Word has length 62 [2021-11-19 13:25:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:22,136 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 339 transitions. [2021-11-19 13:25:22,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 339 transitions. [2021-11-19 13:25:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 13:25:22,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:22,138 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:25:22,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-19 13:25:22,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:22,360 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:22,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1800933116, now seen corresponding path program 1 times [2021-11-19 13:25:22,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:22,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046121440] [2021-11-19 13:25:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:22,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:22,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:22,364 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:22,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:25:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:25:22,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:23,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:23,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:23,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:23,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:23,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:23,446 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:25:23,446 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 [2021-11-19 13:25:24,384 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:25:24,384 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 [2021-11-19 13:25:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:25:24,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:25:24,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:24,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046121440] [2021-11-19 13:25:24,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046121440] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:24,803 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:24,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:25:24,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217185267] [2021-11-19 13:25:24,803 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:24,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:25:24,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:25:24,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:25:24,804 INFO L87 Difference]: Start difference. First operand 231 states and 339 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:26,829 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:32,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:34,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:36,540 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:41,701 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:43,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:44,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:46,857 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:50,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:53,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:00,224 INFO L93 Difference]: Finished difference Result 552 states and 825 transitions. [2021-11-19 13:26:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:26:00,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-19 13:26:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:00,228 INFO L225 Difference]: With dead ends: 552 [2021-11-19 13:26:00,229 INFO L226 Difference]: Without dead ends: 342 [2021-11-19 13:26:00,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:26:00,230 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 188 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:00,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 638 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 474 Invalid, 2 Unknown, 0 Unchecked, 35.3s Time] [2021-11-19 13:26:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-19 13:26:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 234. [2021-11-19 13:26:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.4721030042918455) internal successors, (343), 233 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 343 transitions. [2021-11-19 13:26:00,245 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 343 transitions. Word has length 76 [2021-11-19 13:26:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:00,245 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 343 transitions. [2021-11-19 13:26:00,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 343 transitions. [2021-11-19 13:26:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 13:26:00,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:00,248 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-19 13:26:00,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:00,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:00,462 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:00,463 INFO L85 PathProgramCache]: Analyzing trace with hash -202287172, now seen corresponding path program 1 times [2021-11-19 13:26:00,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:00,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631407006] [2021-11-19 13:26:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:00,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:00,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:00,464 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:00,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:26:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:00,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:26:00,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:00,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:00,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:00,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:00,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:00,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:00,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:01,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:01,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:01,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:01,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:01,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:01,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:01,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:01,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:01,410 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:26:01,410 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 [2021-11-19 13:26:02,213 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:26:02,213 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 [2021-11-19 13:26:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:02,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:02,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:02,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631407006] [2021-11-19 13:26:02,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631407006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:02,633 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:02,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:26:02,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847266974] [2021-11-19 13:26:02,633 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:02,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:26:02,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:02,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:26:02,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:26:02,634 INFO L87 Difference]: Start difference. First operand 234 states and 343 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:04,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:06,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:17,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:18,931 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:21,802 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:25,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:27,681 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:28,882 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:33,020 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:34,227 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:35,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:37,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:39,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:41,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:43,570 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 [] [2021-11-19 13:26:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:43,986 INFO L93 Difference]: Finished difference Result 553 states and 825 transitions. [2021-11-19 13:26:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:26:43,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-19 13:26:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:43,991 INFO L225 Difference]: With dead ends: 553 [2021-11-19 13:26:43,991 INFO L226 Difference]: Without dead ends: 340 [2021-11-19 13:26:43,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:26:43,993 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 168 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 61 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:43,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 665 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 488 Invalid, 4 Unknown, 0 Unchecked, 41.2s Time] [2021-11-19 13:26:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-19 13:26:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 234. [2021-11-19 13:26:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.463519313304721) internal successors, (341), 233 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 341 transitions. [2021-11-19 13:26:44,007 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 341 transitions. Word has length 76 [2021-11-19 13:26:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:44,007 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 341 transitions. [2021-11-19 13:26:44,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 341 transitions. [2021-11-19 13:26:44,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 13:26:44,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:44,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-19 13:26:44,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:44,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:44,214 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash -563287765, now seen corresponding path program 1 times [2021-11-19 13:26:44,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:44,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354329463] [2021-11-19 13:26:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:44,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:44,217 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:44,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:26:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:44,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:26:44,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:44,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:44,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:44,968 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:26:44,969 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 [2021-11-19 13:26:45,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:45,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:45,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:45,378 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:26:45,378 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 [2021-11-19 13:26:47,667 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:26:47,668 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 [2021-11-19 13:26:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:26:47,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:26:48,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:48,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354329463] [2021-11-19 13:26:48,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354329463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:48,138 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:48,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:26:48,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114743660] [2021-11-19 13:26:48,139 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:48,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:26:48,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:26:48,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:26:48,141 INFO L87 Difference]: Start difference. First operand 234 states and 341 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:50,168 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 [] [2021-11-19 13:26:51,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:56,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:59,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:01,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:02,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:07,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:11,718 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:14,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:16,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:17,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:27:18,677 INFO L93 Difference]: Finished difference Result 676 states and 1003 transitions. [2021-11-19 13:27:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:27:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 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 84 [2021-11-19 13:27:18,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:27:18,682 INFO L225 Difference]: With dead ends: 676 [2021-11-19 13:27:18,682 INFO L226 Difference]: Without dead ends: 463 [2021-11-19 13:27:18,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:27:18,684 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 386 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 87 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:27:18,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 529 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 400 Invalid, 2 Unknown, 0 Unchecked, 30.4s Time] [2021-11-19 13:27:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-19 13:27:18,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 288. [2021-11-19 13:27:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.4912891986062717) internal successors, (428), 287 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:27:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 428 transitions. [2021-11-19 13:27:18,700 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 428 transitions. Word has length 84 [2021-11-19 13:27:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:27:18,701 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 428 transitions. [2021-11-19 13:27:18,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:27:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 428 transitions. [2021-11-19 13:27:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 13:27:18,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:27:18,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-11-19 13:27:18,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:27:18,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:27:18,926 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:27:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:27:18,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2033323436, now seen corresponding path program 1 times [2021-11-19 13:27:18,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:27:18,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239504758] [2021-11-19 13:27:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:18,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:27:18,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:27:18,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:27:18,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:27:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:19,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:27:19,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:19,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:19,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:19,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:19,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:19,715 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:27:19,715 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 [2021-11-19 13:27:19,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:19,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:19,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:20,150 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:27:20,150 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 [2021-11-19 13:27:22,602 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:27:22,603 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 [2021-11-19 13:27:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:27:22,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:27:23,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:27:23,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239504758] [2021-11-19 13:27:23,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239504758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:27:23,128 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:27:23,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:27:23,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936140700] [2021-11-19 13:27:23,129 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:27:23,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:27:23,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:27:23,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:27:23,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:27:23,130 INFO L87 Difference]: Start difference. First operand 288 states and 428 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:27:25,150 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:33,260 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:38,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:44,472 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:46,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:51,040 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:53,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:56,870 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:00,296 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:28:01,711 INFO L93 Difference]: Finished difference Result 781 states and 1182 transitions. [2021-11-19 13:28:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:28:01,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-19 13:28:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:28:01,716 INFO L225 Difference]: With dead ends: 781 [2021-11-19 13:28:01,717 INFO L226 Difference]: Without dead ends: 514 [2021-11-19 13:28:01,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:28:01,718 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 280 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 75 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:28:01,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 652 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 492 Invalid, 5 Unknown, 0 Unchecked, 38.4s Time] [2021-11-19 13:28:01,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-19 13:28:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 349. [2021-11-19 13:28:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.5373563218390804) internal successors, (535), 348 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:28:01,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 535 transitions. [2021-11-19 13:28:01,738 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 535 transitions. Word has length 85 [2021-11-19 13:28:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:28:01,739 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 535 transitions. [2021-11-19 13:28:01,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:28:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 535 transitions. [2021-11-19 13:28:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 13:28:01,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:28:01,742 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, 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] [2021-11-19 13:28:01,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:28:01,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:28:01,954 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:28:01,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:28:01,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1665671371, now seen corresponding path program 1 times [2021-11-19 13:28:01,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:28:01,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249341688] [2021-11-19 13:28:01,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:01,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:28:01,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:28:01,957 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:28:01,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:28:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:28:02,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:28:02,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:02,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:02,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:02,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:02,732 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:28:02,733 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 [2021-11-19 13:28:02,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:02,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:02,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:03,188 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:28:03,188 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 [2021-11-19 13:28:04,969 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:28:04,969 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 [2021-11-19 13:28:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:28:05,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:28:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:28:05,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:28:05,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249341688] [2021-11-19 13:28:05,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249341688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:28:05,747 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:28:05,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:28:05,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497531770] [2021-11-19 13:28:05,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:28:05,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:28:05,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:28:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:28:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:28:05,749 INFO L87 Difference]: Start difference. First operand 349 states and 535 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:28:07,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:09,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:21,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:26,689 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:27,904 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:29,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:30,683 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:32,558 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:36,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:38,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:41,394 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:42,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:28:46,112 INFO L93 Difference]: Finished difference Result 883 states and 1354 transitions. [2021-11-19 13:28:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:28:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 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 [2021-11-19 13:28:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:28:46,116 INFO L225 Difference]: With dead ends: 883 [2021-11-19 13:28:46,117 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 13:28:46,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:28:46,118 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 317 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 73 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:28:46,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 713 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 532 Invalid, 3 Unknown, 0 Unchecked, 40.2s Time] [2021-11-19 13:28:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 13:28:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 379. [2021-11-19 13:28:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.5317460317460319) internal successors, (579), 378 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:28:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 579 transitions. [2021-11-19 13:28:46,137 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 579 transitions. Word has length 112 [2021-11-19 13:28:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:28:46,138 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 579 transitions. [2021-11-19 13:28:46,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:28:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 579 transitions. [2021-11-19 13:28:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:28:46,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:28:46,141 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, 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] [2021-11-19 13:28:46,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 13:28:46,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:28:46,354 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:28:46,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:28:46,355 INFO L85 PathProgramCache]: Analyzing trace with hash -726605541, now seen corresponding path program 1 times [2021-11-19 13:28:46,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:28:46,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985738706] [2021-11-19 13:28:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:46,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:28:46,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:28:46,358 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:28:46,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:28:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:28:47,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:28:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:47,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:47,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:47,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:47,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:47,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:47,240 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:28:47,241 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 [2021-11-19 13:28:47,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:47,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:47,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:47,675 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:28:47,678 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 [2021-11-19 13:28:49,470 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:28:49,470 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 [2021-11-19 13:28:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:28:49,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:28:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:28:50,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:28:50,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985738706] [2021-11-19 13:28:50,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985738706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:28:50,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:28:50,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:28:50,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083456471] [2021-11-19 13:28:50,073 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:28:50,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:28:50,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:28:50,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:28:50,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:28:50,074 INFO L87 Difference]: Start difference. First operand 379 states and 579 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 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) [2021-11-19 13:28:52,096 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 [] [2021-11-19 13:28:53,246 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:00,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:12,614 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:14,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:15,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:21,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:22,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:23,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:27,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:29,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:30,589 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:34,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:34,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:34,763 INFO L93 Difference]: Finished difference Result 900 states and 1372 transitions. [2021-11-19 13:29:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:29:34,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 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 113 [2021-11-19 13:29:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:34,768 INFO L225 Difference]: With dead ends: 900 [2021-11-19 13:29:34,768 INFO L226 Difference]: Without dead ends: 542 [2021-11-19 13:29:34,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:34,770 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 291 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 75 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:34,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 820 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 610 Invalid, 4 Unknown, 0 Unchecked, 44.5s Time] [2021-11-19 13:29:34,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-19 13:29:34,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 379. [2021-11-19 13:29:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.5264550264550265) internal successors, (577), 378 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:29:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 577 transitions. [2021-11-19 13:29:34,792 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 577 transitions. Word has length 113 [2021-11-19 13:29:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:34,792 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 577 transitions. [2021-11-19 13:29:34,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 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) [2021-11-19 13:29:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 577 transitions. [2021-11-19 13:29:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:29:34,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:34,795 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, 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] [2021-11-19 13:29:34,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:35,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:35,009 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:35,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:35,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1821991616, now seen corresponding path program 1 times [2021-11-19 13:29:35,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:35,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784315817] [2021-11-19 13:29:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:35,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:35,011 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:35,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:29:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:29:35,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:35,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:35,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:35,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:35,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:35,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:35,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:29:35,744 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:29:35,744 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 [2021-11-19 13:29:35,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:29:35,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:29:35,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:29:36,169 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:29:36,169 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 [2021-11-19 13:29:38,100 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:29:38,100 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 [2021-11-19 13:29:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:29:38,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:29:38,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:38,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784315817] [2021-11-19 13:29:38,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784315817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:38,778 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:38,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:29:38,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064412400] [2021-11-19 13:29:38,778 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:38,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:29:38,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:29:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:29:38,780 INFO L87 Difference]: Start difference. First operand 379 states and 577 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:29:40,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:44,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:55,011 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:00,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:01,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:04,612 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:07,422 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 [] [2021-11-19 13:30:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:09,108 INFO L93 Difference]: Finished difference Result 962 states and 1468 transitions. [2021-11-19 13:30:09,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:30:09,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 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 113 [2021-11-19 13:30:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:09,117 INFO L225 Difference]: With dead ends: 962 [2021-11-19 13:30:09,118 INFO L226 Difference]: Without dead ends: 604 [2021-11-19 13:30:09,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:30:09,120 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 283 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:09,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 772 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 502 Invalid, 1 Unknown, 0 Unchecked, 30.2s Time] [2021-11-19 13:30:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-19 13:30:09,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 444. [2021-11-19 13:30:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.5237020316027088) internal successors, (675), 443 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:30:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 675 transitions. [2021-11-19 13:30:09,143 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 675 transitions. Word has length 113 [2021-11-19 13:30:09,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:09,144 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 675 transitions. [2021-11-19 13:30:09,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:30:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 675 transitions. [2021-11-19 13:30:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 13:30:09,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:09,146 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, 1, 1] [2021-11-19 13:30:09,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:09,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:09,362 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:09,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1524580309, now seen corresponding path program 1 times [2021-11-19 13:30:09,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:09,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184546502] [2021-11-19 13:30:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:09,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:09,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:09,365 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:09,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:30:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:30:09,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:09,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:09,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:09,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:09,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:09,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:10,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:10,089 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:30:10,089 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 [2021-11-19 13:30:10,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:10,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:10,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:10,518 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:30:10,519 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 [2021-11-19 13:30:12,130 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:30:12,130 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 [2021-11-19 13:30:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:30:12,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:30:12,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:12,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184546502] [2021-11-19 13:30:12,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184546502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:12,722 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:12,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:30:12,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677040207] [2021-11-19 13:30:12,723 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:12,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:30:12,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:12,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:30:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:30:12,724 INFO L87 Difference]: Start difference. First operand 444 states and 675 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:30:14,748 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 [] [2021-11-19 13:30:16,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:19,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:31,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:35,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:41,936 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 [] [2021-11-19 13:30:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:42,091 INFO L93 Difference]: Finished difference Result 1068 states and 1622 transitions. [2021-11-19 13:30:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:30:42,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 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 114 [2021-11-19 13:30:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:42,095 INFO L225 Difference]: With dead ends: 1068 [2021-11-19 13:30:42,095 INFO L226 Difference]: Without dead ends: 645 [2021-11-19 13:30:42,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:30:42,096 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 311 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 78 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:42,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 503 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 405 Invalid, 2 Unknown, 0 Unchecked, 29.2s Time] [2021-11-19 13:30:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-19 13:30:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 472. [2021-11-19 13:30:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.5116772823779194) internal successors, (712), 471 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:30:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 712 transitions. [2021-11-19 13:30:42,118 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 712 transitions. Word has length 114 [2021-11-19 13:30:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:42,119 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 712 transitions. [2021-11-19 13:30:42,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:30:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 712 transitions. [2021-11-19 13:30:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 13:30:42,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:42,121 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, 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] [2021-11-19 13:30:42,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:42,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:42,340 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash -735719525, now seen corresponding path program 1 times [2021-11-19 13:30:42,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:42,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505183095] [2021-11-19 13:30:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:42,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:42,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:42,342 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:42,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:30:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:42,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:30:42,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:42,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:42,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:42,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:42,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:42,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:42,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:43,071 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:30:43,072 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 [2021-11-19 13:30:43,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:43,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:43,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:43,478 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:30:43,479 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 [2021-11-19 13:30:45,140 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:30:45,140 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 [2021-11-19 13:30:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:30:45,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:30:45,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:45,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505183095] [2021-11-19 13:30:45,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505183095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:45,738 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:45,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:30:45,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028326937] [2021-11-19 13:30:45,738 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:45,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:30:45,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:45,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:30:45,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:30:45,740 INFO L87 Difference]: Start difference. First operand 472 states and 712 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 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) [2021-11-19 13:30:47,783 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 [] [2021-11-19 13:30:49,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:51,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:00,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:14,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:17,281 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:20,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:22,747 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:25,684 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:27,476 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:30,132 INFO L93 Difference]: Finished difference Result 1076 states and 1620 transitions. [2021-11-19 13:31:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:31:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 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 115 [2021-11-19 13:31:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:30,137 INFO L225 Difference]: With dead ends: 1076 [2021-11-19 13:31:30,137 INFO L226 Difference]: Without dead ends: 625 [2021-11-19 13:31:30,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:31:30,138 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 221 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 74 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:30,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 751 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 615 Invalid, 2 Unknown, 0 Unchecked, 44.2s Time] [2021-11-19 13:31:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-19 13:31:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 472. [2021-11-19 13:31:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.4989384288747345) internal successors, (706), 471 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:31:30,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 706 transitions. [2021-11-19 13:31:30,161 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 706 transitions. Word has length 115 [2021-11-19 13:31:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:30,161 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 706 transitions. [2021-11-19 13:31:30,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 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) [2021-11-19 13:31:30,162 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 706 transitions. [2021-11-19 13:31:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 13:31:30,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:30,163 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, 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] [2021-11-19 13:31:30,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:30,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:30,398 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:30,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1964206957, now seen corresponding path program 1 times [2021-11-19 13:31:30,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:30,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086210181] [2021-11-19 13:31:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:30,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:30,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:30,400 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:30,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:31:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:30,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:31:30,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:31,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:31,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:31,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:31,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:31,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:31,136 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:31:31,137 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 [2021-11-19 13:31:31,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:31,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:31,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:31,616 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:31:31,616 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 [2021-11-19 13:31:33,885 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:31:33,886 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 [2021-11-19 13:31:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:31:34,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:31:34,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:34,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086210181] [2021-11-19 13:31:34,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086210181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:34,557 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:34,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:31:34,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347838394] [2021-11-19 13:31:34,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:34,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:31:34,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:34,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:31:34,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:31:34,558 INFO L87 Difference]: Start difference. First operand 472 states and 706 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:31:36,577 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 [] [2021-11-19 13:31:43,921 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:56,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:57,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:59,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:00,802 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:08,540 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:08,817 INFO L93 Difference]: Finished difference Result 1116 states and 1667 transitions. [2021-11-19 13:32:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:32:08,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-19 13:32:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:08,822 INFO L225 Difference]: With dead ends: 1116 [2021-11-19 13:32:08,822 INFO L226 Difference]: Without dead ends: 665 [2021-11-19 13:32:08,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:32:08,824 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 251 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 72 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:08,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 592 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 492 Invalid, 1 Unknown, 0 Unchecked, 34.1s Time] [2021-11-19 13:32:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-19 13:32:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 509. [2021-11-19 13:32:08,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.4940944881889764) internal successors, (759), 508 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 759 transitions. [2021-11-19 13:32:08,858 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 759 transitions. Word has length 118 [2021-11-19 13:32:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:08,858 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 759 transitions. [2021-11-19 13:32:08,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 759 transitions. [2021-11-19 13:32:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 13:32:08,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:08,861 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, 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] [2021-11-19 13:32:08,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:09,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:09,082 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash -99507122, now seen corresponding path program 1 times [2021-11-19 13:32:09,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:09,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887958408] [2021-11-19 13:32:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:09,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:09,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:09,084 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:09,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:32:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:32:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:32:09,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:32:09,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:32:09,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:32:09,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:32:09,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:32:09,734 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:32:09,735 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 [2021-11-19 13:32:09,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:32:09,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:32:09,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:32:10,152 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:32:10,152 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 [2021-11-19 13:32:12,240 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:32:12,240 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 [2021-11-19 13:32:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:32:12,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:32:12,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:12,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887958408] [2021-11-19 13:32:12,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887958408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:12,797 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:12,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:32:12,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731114359] [2021-11-19 13:32:12,797 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:12,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:32:12,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:12,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:32:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:32:12,798 INFO L87 Difference]: Start difference. First operand 509 states and 759 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 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) [2021-11-19 13:32:14,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:30,902 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:33,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:35,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:37,568 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:39,853 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:41,449 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:45,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:45,247 INFO L93 Difference]: Finished difference Result 1148 states and 1710 transitions. [2021-11-19 13:32:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:32:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 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 119 [2021-11-19 13:32:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:45,252 INFO L225 Difference]: With dead ends: 1148 [2021-11-19 13:32:45,252 INFO L226 Difference]: Without dead ends: 660 [2021-11-19 13:32:45,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:32:45,253 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 301 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 78 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:45,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 633 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 516 Invalid, 2 Unknown, 0 Unchecked, 32.3s Time] [2021-11-19 13:32:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-19 13:32:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 509. [2021-11-19 13:32:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.4881889763779528) internal successors, (756), 508 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 756 transitions. [2021-11-19 13:32:45,277 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 756 transitions. Word has length 119 [2021-11-19 13:32:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:45,278 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 756 transitions. [2021-11-19 13:32:45,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 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) [2021-11-19 13:32:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 756 transitions. [2021-11-19 13:32:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:32:45,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:45,280 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, 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] [2021-11-19 13:32:45,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:45,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:45,485 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:45,485 INFO L85 PathProgramCache]: Analyzing trace with hash 28083966, now seen corresponding path program 1 times [2021-11-19 13:32:45,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:45,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340191021] [2021-11-19 13:32:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:45,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:45,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:45,487 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:45,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:32:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:45,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:32:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:32:46,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:32:46,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:46,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340191021] [2021-11-19 13:32:46,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340191021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:46,392 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:46,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:32:46,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637003637] [2021-11-19 13:32:46,393 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:46,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:32:46,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:46,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:32:46,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:32:46,394 INFO L87 Difference]: Start difference. First operand 509 states and 756 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:47,388 INFO L93 Difference]: Finished difference Result 1927 states and 2881 transitions. [2021-11-19 13:32:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:32:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-19 13:32:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:47,395 INFO L225 Difference]: With dead ends: 1927 [2021-11-19 13:32:47,395 INFO L226 Difference]: Without dead ends: 1439 [2021-11-19 13:32:47,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:32:47,397 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 293 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:47,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 627 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:32:47,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-19 13:32:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1431. [2021-11-19 13:32:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 1.4888111888111888) internal successors, (2129), 1430 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2129 transitions. [2021-11-19 13:32:47,464 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2129 transitions. Word has length 127 [2021-11-19 13:32:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:47,464 INFO L470 AbstractCegarLoop]: Abstraction has 1431 states and 2129 transitions. [2021-11-19 13:32:47,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2129 transitions. [2021-11-19 13:32:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 13:32:47,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:47,468 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:47,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:47,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:47,688 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:47,688 INFO L85 PathProgramCache]: Analyzing trace with hash 841592010, now seen corresponding path program 1 times [2021-11-19 13:32:47,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:47,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598485067] [2021-11-19 13:32:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:47,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:47,690 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:47,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:32:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:47,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:32:47,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:32:48,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:32:48,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:48,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598485067] [2021-11-19 13:32:48,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598485067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:48,632 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:48,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:32:48,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82277641] [2021-11-19 13:32:48,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:48,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:48,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:48,633 INFO L87 Difference]: Start difference. First operand 1431 states and 2129 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:49,399 INFO L93 Difference]: Finished difference Result 2868 states and 4271 transitions. [2021-11-19 13:32:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-19 13:32:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:49,418 INFO L225 Difference]: With dead ends: 2868 [2021-11-19 13:32:49,418 INFO L226 Difference]: Without dead ends: 1458 [2021-11-19 13:32:49,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:49,420 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 15 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:49,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 414 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:32:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-11-19 13:32:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1458. [2021-11-19 13:32:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 1.4852436513383664) internal successors, (2164), 1457 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2164 transitions. [2021-11-19 13:32:49,484 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2164 transitions. Word has length 128 [2021-11-19 13:32:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:49,484 INFO L470 AbstractCegarLoop]: Abstraction has 1458 states and 2164 transitions. [2021-11-19 13:32:49,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:49,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2164 transitions. [2021-11-19 13:32:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 13:32:49,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:49,488 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:49,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:49,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:49,703 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:49,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1300268468, now seen corresponding path program 1 times [2021-11-19 13:32:49,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:49,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005320305] [2021-11-19 13:32:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:49,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:49,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:49,707 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:49,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 13:32:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:50,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:32:50,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 13:32:50,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 13:32:50,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:50,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005320305] [2021-11-19 13:32:50,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005320305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:50,823 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:50,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:32:50,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128897196] [2021-11-19 13:32:50,823 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:50,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:50,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:50,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:50,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:50,824 INFO L87 Difference]: Start difference. First operand 1458 states and 2164 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:50,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:50,919 INFO L93 Difference]: Finished difference Result 2897 states and 4307 transitions. [2021-11-19 13:32:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-19 13:32:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:50,938 INFO L225 Difference]: With dead ends: 2897 [2021-11-19 13:32:50,938 INFO L226 Difference]: Without dead ends: 1460 [2021-11-19 13:32:50,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:32:50,940 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:50,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 393 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:50,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-11-19 13:32:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2021-11-19 13:32:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 1.4845784784098697) internal successors, (2166), 1459 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2166 transitions. [2021-11-19 13:32:51,006 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2166 transitions. Word has length 128 [2021-11-19 13:32:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:51,006 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 2166 transitions. [2021-11-19 13:32:51,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2166 transitions. [2021-11-19 13:32:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:32:51,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:51,009 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:51,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:51,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:51,224 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash 821528815, now seen corresponding path program 1 times [2021-11-19 13:32:51,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:51,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929348998] [2021-11-19 13:32:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:51,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:51,228 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:51,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 13:32:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:51,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:32:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:51,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:32:51,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:32:51,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:32:51,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:32:51,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:32:51,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:32:51,867 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:32:51,868 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 [2021-11-19 13:32:51,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:32:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:32:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:32:52,264 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:32:52,265 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 [2021-11-19 13:32:54,677 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:32:54,677 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 [2021-11-19 13:32:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:32:54,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:32:56,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:56,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929348998] [2021-11-19 13:32:56,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929348998] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:56,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:56,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-19 13:32:56,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90114964] [2021-11-19 13:32:56,060 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:56,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:32:56,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:56,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:32:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:32:56,061 INFO L87 Difference]: Start difference. First operand 1460 states and 2166 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:32:58,086 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:00,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:11,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:12,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:16,451 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:18,836 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:20,014 INFO L93 Difference]: Finished difference Result 3088 states and 4570 transitions. [2021-11-19 13:33:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:33:20,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 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 130 [2021-11-19 13:33:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:20,029 INFO L225 Difference]: With dead ends: 3088 [2021-11-19 13:33:20,029 INFO L226 Difference]: Without dead ends: 1651 [2021-11-19 13:33:20,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:33:20,033 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 38 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:20,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 634 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 308 Invalid, 2 Unknown, 0 Unchecked, 23.8s Time] [2021-11-19 13:33:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-11-19 13:33:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1587. [2021-11-19 13:33:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 1.4798234552332914) internal successors, (2347), 1586 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2347 transitions. [2021-11-19 13:33:20,118 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2347 transitions. Word has length 130 [2021-11-19 13:33:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:20,119 INFO L470 AbstractCegarLoop]: Abstraction has 1587 states and 2347 transitions. [2021-11-19 13:33:20,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2347 transitions. [2021-11-19 13:33:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:33:20,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:20,122 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:20,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:20,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:20,337 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash 235252593, now seen corresponding path program 1 times [2021-11-19 13:33:20,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:20,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001855329] [2021-11-19 13:33:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:20,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:20,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:20,341 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:20,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 13:33:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:21,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:33:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:21,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:33:21,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:33:21,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:33:21,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:33:21,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:33:21,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:21,502 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-19 13:33:21,502 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 38 [2021-11-19 13:33:21,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:21,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:21,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:21,943 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:33:21,943 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 70 treesize of output 87 [2021-11-19 13:33:23,433 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:33:23,433 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 108 treesize of output 36 [2021-11-19 13:33:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 13:33:23,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 13:33:24,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:24,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001855329] [2021-11-19 13:33:24,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001855329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:24,557 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:24,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-19 13:33:24,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427893697] [2021-11-19 13:33:24,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:24,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:33:24,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:24,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:33:24,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:33:24,558 INFO L87 Difference]: Start difference. First operand 1587 states and 2347 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 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) [2021-11-19 13:33:26,587 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:28,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:39,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:40,709 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:43,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:44,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:48,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:50,097 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:50,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:50,261 INFO L93 Difference]: Finished difference Result 3260 states and 4820 transitions. [2021-11-19 13:33:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:33:50,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 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 130 [2021-11-19 13:33:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:50,276 INFO L225 Difference]: With dead ends: 3260 [2021-11-19 13:33:50,276 INFO L226 Difference]: Without dead ends: 1696 [2021-11-19 13:33:50,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:33:50,280 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 25 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:50,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 702 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 25.6s Time] [2021-11-19 13:33:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-11-19 13:33:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1659. [2021-11-19 13:33:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 1.47708082026538) internal successors, (2449), 1658 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2449 transitions. [2021-11-19 13:33:50,370 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2449 transitions. Word has length 130 [2021-11-19 13:33:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:50,370 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 2449 transitions. [2021-11-19 13:33:50,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 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) [2021-11-19 13:33:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2449 transitions. [2021-11-19 13:33:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 13:33:50,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:50,374 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-19 13:33:50,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:50,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:50,595 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash -126274943, now seen corresponding path program 1 times [2021-11-19 13:33:50,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:50,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616849996] [2021-11-19 13:33:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:50,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:50,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:50,598 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:50,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 13:33:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:51,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:33:51,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:51,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:33:51,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:33:51,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:33:51,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:33:51,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:33:51,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:51,547 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:33:51,547 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 [2021-11-19 13:33:51,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:51,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:51,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:52,004 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:33:52,005 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 [2021-11-19 13:33:53,582 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:33:53,582 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 [2021-11-19 13:33:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:33:53,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:33:54,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:54,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616849996] [2021-11-19 13:33:54,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616849996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:54,464 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:54,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:33:54,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580235992] [2021-11-19 13:33:54,464 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:54,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:33:54,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:54,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:33:54,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:33:54,466 INFO L87 Difference]: Start difference. First operand 1659 states and 2449 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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) [2021-11-19 13:33:56,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:11,844 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:14,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:17,841 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:19,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:24,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:28,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:32,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:35,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:36,173 INFO L93 Difference]: Finished difference Result 3698 states and 5428 transitions. [2021-11-19 13:34:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:34:36,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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 142 [2021-11-19 13:34:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:36,189 INFO L225 Difference]: With dead ends: 3698 [2021-11-19 13:34:36,189 INFO L226 Difference]: Without dead ends: 2062 [2021-11-19 13:34:36,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:36,192 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 237 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 66 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:36,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 760 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 611 Invalid, 3 Unknown, 0 Unchecked, 41.5s Time] [2021-11-19 13:34:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-11-19 13:34:36,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1737. [2021-11-19 13:34:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 1.462557603686636) internal successors, (2539), 1736 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:34:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2539 transitions. [2021-11-19 13:34:36,283 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2539 transitions. Word has length 142 [2021-11-19 13:34:36,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:36,283 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 2539 transitions. [2021-11-19 13:34:36,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 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) [2021-11-19 13:34:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2539 transitions. [2021-11-19 13:34:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 13:34:36,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:36,287 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-19 13:34:36,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-19 13:34:36,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:36,511 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:36,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1269611353, now seen corresponding path program 1 times [2021-11-19 13:34:36,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:36,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228455653] [2021-11-19 13:34:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:36,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:36,514 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:36,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 13:34:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:34:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:37,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:34:37,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:34:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:34:37,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:34:37,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:34:37,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:34:37,527 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:34:37,528 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 [2021-11-19 13:34:37,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:34:37,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:34:37,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:34:37,977 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:34:37,978 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 [2021-11-19 13:34:39,631 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:34:39,631 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 [2021-11-19 13:34:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:34:39,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:34:40,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:40,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228455653] [2021-11-19 13:34:40,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228455653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:40,475 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:40,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:34:40,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336643685] [2021-11-19 13:34:40,476 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:40,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:34:40,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:40,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:34:40,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:34:40,477 INFO L87 Difference]: Start difference. First operand 1737 states and 2539 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2021-11-19 13:34:42,506 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 [] [2021-11-19 13:34:44,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:52,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:57,213 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:02,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:11,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:12,841 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:14,191 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:16,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:18,214 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:20,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:22,441 INFO L93 Difference]: Finished difference Result 3728 states and 5425 transitions. [2021-11-19 13:35:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:35:22,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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 143 [2021-11-19 13:35:22,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:22,463 INFO L225 Difference]: With dead ends: 3728 [2021-11-19 13:35:22,463 INFO L226 Difference]: Without dead ends: 2014 [2021-11-19 13:35:22,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:35:22,465 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 200 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:22,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 746 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 614 Invalid, 1 Unknown, 0 Unchecked, 41.8s Time] [2021-11-19 13:35:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-11-19 13:35:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1737. [2021-11-19 13:35:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 1.4470046082949308) internal successors, (2512), 1736 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:35:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2512 transitions. [2021-11-19 13:35:22,541 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2512 transitions. Word has length 143 [2021-11-19 13:35:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:22,541 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 2512 transitions. [2021-11-19 13:35:22,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2021-11-19 13:35:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2512 transitions. [2021-11-19 13:35:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 13:35:22,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:22,545 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 13:35:22,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-19 13:35:22,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:22,750 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash -967520492, now seen corresponding path program 1 times [2021-11-19 13:35:22,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:22,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646607760] [2021-11-19 13:35:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:22,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:22,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:22,753 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:22,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_231d1ee8-6b21-4bd7-8fec-fad916bb76e5/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 13:35:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:35:23,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:23,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:35:23,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:35:23,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:35:23,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:35:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:35:23,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:35:23,715 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:35:23,716 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 [2021-11-19 13:35:23,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:35:23,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:35:23,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:35:24,173 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:35:24,173 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 [2021-11-19 13:35:26,415 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:35:26,415 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 [2021-11-19 13:35:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:35:26,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 13:35:27,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:27,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646607760] [2021-11-19 13:35:27,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646607760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:27,310 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:27,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:35:27,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793244575] [2021-11-19 13:35:27,310 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:27,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:35:27,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:35:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:35:27,315 INFO L87 Difference]: Start difference. First operand 1737 states and 2512 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 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) [2021-11-19 13:35:29,349 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:33,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:39,806 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:47,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:48,551 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:52,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []