./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:37:29,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:37:29,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:37:29,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:37:29,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:37:29,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:37:29,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:37:29,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:37:29,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:37:29,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:37:29,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:37:29,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:37:29,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:37:29,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:37:29,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:37:29,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:37:29,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:37:29,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:37:29,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:37:29,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:37:29,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:37:29,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:37:29,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:37:29,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:37:29,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:37:29,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:37:29,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:37:29,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:37:29,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:37:29,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:37:29,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:37:29,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:37:29,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:37:29,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:37:29,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:37:29,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:37:29,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:37:29,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:37:29,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:37:29,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:37:29,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:37:29,405 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:37:29,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:37:29,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:37:29,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:37:29,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:37:29,453 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:37:29,453 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:37:29,453 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:37:29,453 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:37:29,453 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:37:29,454 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:37:29,455 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:37:29,455 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:37:29,455 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:37:29,456 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:37:29,456 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:37:29,456 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:37:29,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:37:29,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:37:29,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:37:29,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:37:29,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:37:29,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:37:29,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:37:29,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:37:29,467 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:37:29,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:37:29,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:37:29,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:37:29,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:37:29,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:37:29,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:37:29,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:29,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:37:29,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:37:29,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:37:29,469 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:37:29,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:37:29,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:37:29,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:37:29,470 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:37:29,470 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_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 [2021-11-13 02:37:29,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:37:29,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:37:29,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:37:29,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:37:29,817 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:37:29,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-13 02:37:29,879 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/data/57c7ed749/962f553c8f0e4b79802844b546013382/FLAGcf6199bfa [2021-11-13 02:37:30,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:37:30,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-13 02:37:30,684 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/data/57c7ed749/962f553c8f0e4b79802844b546013382/FLAGcf6199bfa [2021-11-13 02:37:30,822 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/data/57c7ed749/962f553c8f0e4b79802844b546013382 [2021-11-13 02:37:30,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:37:30,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:37:30,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:30,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:37:30,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:37:30,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:30" (1/1) ... [2021-11-13 02:37:30,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d40d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:30, skipping insertion in model container [2021-11-13 02:37:30,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:30" (1/1) ... [2021-11-13 02:37:30,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:37:30,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:37:31,385 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-13 02:37:31,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:31,422 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) [2021-11-13 02:37:31,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38893b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:31, skipping insertion in model container [2021-11-13 02:37:31,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:31,427 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:37:31,429 INFO L158 Benchmark]: Toolchain (without parser) took 599.95ms. Allocated memory is still 94.4MB. Free memory was 70.6MB in the beginning and 59.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 02:37:31,430 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory is still 68.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:37:31,431 INFO L158 Benchmark]: CACSL2BoogieTranslator took 592.63ms. Allocated memory is still 94.4MB. Free memory was 70.3MB in the beginning and 59.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 02:37:31,434 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory is still 68.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 592.63ms. Allocated memory is still 94.4MB. Free memory was 70.3MB in the beginning and 59.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. 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_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:37:33,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:37:33,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:37:33,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:37:33,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:37:33,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:37:33,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:37:33,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:37:33,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:37:33,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:37:33,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:37:33,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:37:33,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:37:33,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:37:33,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:37:33,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:37:33,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:37:33,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:37:33,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:37:33,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:37:33,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:37:33,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:37:33,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:37:33,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:37:34,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:37:34,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:37:34,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:37:34,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:37:34,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:37:34,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:37:34,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:37:34,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:37:34,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:37:34,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:37:34,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:37:34,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:37:34,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:37:34,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:37:34,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:37:34,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:37:34,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:37:34,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:37:34,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:37:34,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:37:34,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:37:34,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:37:34,069 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:37:34,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:37:34,069 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:37:34,069 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:37:34,070 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:37:34,070 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:37:34,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:37:34,073 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:37:34,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:37:34,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:37:34,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:37:34,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:37:34,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:37:34,075 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:37:34,075 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:37:34,075 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:37:34,075 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:37:34,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:37:34,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:37:34,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:37:34,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:37:34,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:37:34,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:37:34,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:34,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:37:34,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:37:34,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:37:34,078 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:37:34,078 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:34,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:37:34,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:37:34,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:37:34,079 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_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 [2021-11-13 02:37:34,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:37:34,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:37:34,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:37:34,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:37:34,481 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:37:34,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-13 02:37:34,569 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/data/5e3cee5d6/3563d95eab7d482f9a7670fb2cb385d1/FLAG5712b00dc [2021-11-13 02:37:35,247 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:37:35,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-13 02:37:35,277 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/data/5e3cee5d6/3563d95eab7d482f9a7670fb2cb385d1/FLAG5712b00dc [2021-11-13 02:37:35,460 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/data/5e3cee5d6/3563d95eab7d482f9a7670fb2cb385d1 [2021-11-13 02:37:35,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:37:35,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:37:35,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:35,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:37:35,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:37:35,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:35" (1/1) ... [2021-11-13 02:37:35,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a2a146c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:35, skipping insertion in model container [2021-11-13 02:37:35,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:35" (1/1) ... [2021-11-13 02:37:35,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:37:35,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:37:36,158 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-13 02:37:36,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:36,215 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:37:36,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:37:36,397 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-13 02:37:36,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:36,419 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:37:36,584 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-13 02:37:36,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:36,613 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:37:36,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36 WrapperNode [2021-11-13 02:37:36,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:36,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:37:36,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:37:36,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:37:36,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (1/1) ... [2021-11-13 02:37:36,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (1/1) ... [2021-11-13 02:37:36,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:37:36,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:37:36,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:37:36,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:37:36,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (1/1) ... [2021-11-13 02:37:36,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (1/1) ... [2021-11-13 02:37:36,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (1/1) ... [2021-11-13 02:37:36,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (1/1) ... [2021-11-13 02:37:36,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (1/1) ... [2021-11-13 02:37:36,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (1/1) ... [2021-11-13 02:37:36,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (1/1) ... [2021-11-13 02:37:36,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:37:36,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:37:36,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:37:36,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:37:36,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (1/1) ... [2021-11-13 02:37:36,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:37:36,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:37:36,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:37:36,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:37:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:37:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:37:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 02:37:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:37:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:37:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:37:36,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:37:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 02:37:37,134 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-13 02:37:45,475 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-13 02:37:45,475 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-13 02:37:45,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:37:45,487 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:37:45,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:37:45 BoogieIcfgContainer [2021-11-13 02:37:45,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:37:45,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:37:45,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:37:45,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:37:45,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:37:35" (1/3) ... [2021-11-13 02:37:45,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2289dcbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:37:45, skipping insertion in model container [2021-11-13 02:37:45,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:36" (2/3) ... [2021-11-13 02:37:45,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2289dcbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:37:45, skipping insertion in model container [2021-11-13 02:37:45,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:37:45" (3/3) ... [2021-11-13 02:37:45,500 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.11.i.cil-2.c [2021-11-13 02:37:45,507 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:37:45,507 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:37:45,586 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:37:45,604 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 [2021-11-13 02:37:45,605 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:37:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 02:37:45,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:45,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:45,642 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-11-13 02:37:45,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:45,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173148519] [2021-11-13 02:37:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:45,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:45,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:45,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:45,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:37:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:45,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:46,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:46,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:46,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173148519] [2021-11-13 02:37:46,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173148519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:46,433 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:46,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:37:46,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707163234] [2021-11-13 02:37:46,437 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:46,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:46,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:46,480 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:46,703 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-13 02:37:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 02:37:46,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:46,725 INFO L225 Difference]: With dead ends: 566 [2021-11-13 02:37:46,725 INFO L226 Difference]: Without dead ends: 387 [2021-11-13 02:37:46,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:46,734 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 402 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.95ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.34ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:46,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 670 Invalid, 76 Unknown, 0 Unchecked, 9.95ms Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 133.34ms Time] [2021-11-13 02:37:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-13 02:37:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-13 02:37:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-13 02:37:46,832 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-13 02:37:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:46,833 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-13 02:37:46,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-13 02:37:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 02:37:46,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:46,838 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] [2021-11-13 02:37:46,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:47,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:47,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:47,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1287801256, now seen corresponding path program 1 times [2021-11-13 02:37:47,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:47,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734273904] [2021-11-13 02:37:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:47,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:47,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:47,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:47,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:37:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:47,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:47,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:47,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:47,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734273904] [2021-11-13 02:37:47,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734273904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:47,907 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:47,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:37:47,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545461807] [2021-11-13 02:37:47,908 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:47,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:47,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:47,911 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:48,903 INFO L93 Difference]: Finished difference Result 884 states and 1359 transitions. [2021-11-13 02:37:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:48,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-13 02:37:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:48,909 INFO L225 Difference]: With dead ends: 884 [2021-11-13 02:37:48,910 INFO L226 Difference]: Without dead ends: 633 [2021-11-13 02:37:48,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:48,917 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 302 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 916.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.96ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 950.10ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:48,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 730 Invalid, 79 Unknown, 0 Unchecked, 3.96ms Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 950.10ms Time] [2021-11-13 02:37:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-13 02:37:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 631. [2021-11-13 02:37:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.5206349206349206) internal successors, (958), 630 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 958 transitions. [2021-11-13 02:37:48,975 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 958 transitions. Word has length 61 [2021-11-13 02:37:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:48,976 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 958 transitions. [2021-11-13 02:37:48,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 958 transitions. [2021-11-13 02:37:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 02:37:48,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:48,985 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, 1, 1, 1] [2021-11-13 02:37:49,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:49,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:49,204 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:49,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1861684425, now seen corresponding path program 1 times [2021-11-13 02:37:49,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:49,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889748326] [2021-11-13 02:37:49,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:49,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:49,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:49,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:49,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:37:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:49,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:49,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:37:49,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:37:50,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:50,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889748326] [2021-11-13 02:37:50,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889748326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:50,341 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:50,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:37:50,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328997737] [2021-11-13 02:37:50,344 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:50,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:50,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:50,348 INFO L87 Difference]: Start difference. First operand 631 states and 958 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:51,002 INFO L93 Difference]: Finished difference Result 1372 states and 2097 transitions. [2021-11-13 02:37:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:51,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-13 02:37:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:51,017 INFO L225 Difference]: With dead ends: 1372 [2021-11-13 02:37:51,017 INFO L226 Difference]: Without dead ends: 875 [2021-11-13 02:37:51,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:51,026 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 297 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 559.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.32ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 604.37ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:51,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 727 Invalid, 79 Unknown, 0 Unchecked, 3.32ms Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 604.37ms Time] [2021-11-13 02:37:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-13 02:37:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2021-11-13 02:37:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.5183066361556063) internal successors, (1327), 874 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1327 transitions. [2021-11-13 02:37:51,083 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1327 transitions. Word has length 117 [2021-11-13 02:37:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:51,084 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1327 transitions. [2021-11-13 02:37:51,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:51,086 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1327 transitions. [2021-11-13 02:37:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:37:51,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:51,098 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:51,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:51,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:51,312 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:51,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1505494372, now seen corresponding path program 1 times [2021-11-13 02:37:51,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:51,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187978851] [2021-11-13 02:37:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:51,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:51,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:51,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:51,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:37:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:51,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:51,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 02:37:52,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 02:37:52,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:52,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187978851] [2021-11-13 02:37:52,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187978851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:52,501 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:52,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:37:52,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157104068] [2021-11-13 02:37:52,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:52,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:52,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:52,504 INFO L87 Difference]: Start difference. First operand 875 states and 1327 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:53,290 INFO L93 Difference]: Finished difference Result 1860 states and 2833 transitions. [2021-11-13 02:37:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:53,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 146 [2021-11-13 02:37:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:53,297 INFO L225 Difference]: With dead ends: 1860 [2021-11-13 02:37:53,297 INFO L226 Difference]: Without dead ends: 1119 [2021-11-13 02:37:53,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:53,300 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 306 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 696.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 726.77ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:53,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 725 Invalid, 74 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [19 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 726.77ms Time] [2021-11-13 02:37:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-13 02:37:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-13 02:37:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.5143112701252237) internal successors, (1693), 1118 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1693 transitions. [2021-11-13 02:37:53,350 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1693 transitions. Word has length 146 [2021-11-13 02:37:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:53,350 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1693 transitions. [2021-11-13 02:37:53,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1693 transitions. [2021-11-13 02:37:53,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-13 02:37:53,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:53,355 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:53,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:53,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:53,575 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1562257391, now seen corresponding path program 1 times [2021-11-13 02:37:53,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:53,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652763194] [2021-11-13 02:37:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:53,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:53,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:53,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:53,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:37:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:54,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 02:37:54,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:54,578 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 [2021-11-13 02:37:54,589 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 [2021-11-13 02:37:54,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:54,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-13 02:37:54,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-13 02:37:55,195 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-13 02:37:55,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 601 treesize of output 573 [2021-11-13 02:37:55,311 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-13 02:37:55,311 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 [2021-11-13 02:37:55,322 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:55,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-13 02:37:55,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:55,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-13 02:37:55,346 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 [2021-11-13 02:37:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,500 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 [2021-11-13 02:37:55,637 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-13 02:37:55,638 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 [2021-11-13 02:37:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:37:55,673 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 [2021-11-13 02:37:55,705 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 [2021-11-13 02:37:55,711 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 [2021-11-13 02:37:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-13 02:37:56,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:56,745 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:56,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-13 02:37:56,753 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:56,755 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-13 02:37:56,927 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:56,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-13 02:37:56,937 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:56,941 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-13 02:37:56,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:56,956 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-13 02:37:56,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:56,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-13 02:37:56,992 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:56,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-13 02:37:57,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:37:57,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-13 02:37:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-13 02:37:57,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:57,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652763194] [2021-11-13 02:37:57,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652763194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:57,540 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:57,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:37:57,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104549245] [2021-11-13 02:37:57,542 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:57,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:37:57,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:57,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:37:57,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:37:57,544 INFO L87 Difference]: Start difference. First operand 1119 states and 1693 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:37:59,585 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 [] [2021-11-13 02:38:01,604 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:11,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:12,808 INFO L93 Difference]: Finished difference Result 2235 states and 3382 transitions. [2021-11-13 02:38:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:38:12,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-13 02:38:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:12,818 INFO L225 Difference]: With dead ends: 2235 [2021-11-13 02:38:12,818 INFO L226 Difference]: Without dead ends: 1119 [2021-11-13 02:38:12,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:38:12,821 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 12 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14748.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 15128.18ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:12,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 822 Invalid, 228 Unknown, 0 Unchecked, 3.82ms Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 59 Unchecked, 15128.18ms Time] [2021-11-13 02:38:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-13 02:38:12,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-13 02:38:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.513416815742397) internal successors, (1692), 1118 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1692 transitions. [2021-11-13 02:38:12,868 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1692 transitions. Word has length 170 [2021-11-13 02:38:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:12,868 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1692 transitions. [2021-11-13 02:38:12,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1692 transitions. [2021-11-13 02:38:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-13 02:38:12,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:12,873 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:12,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:13,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:13,088 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash 872425901, now seen corresponding path program 1 times [2021-11-13 02:38:13,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:13,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893284444] [2021-11-13 02:38:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:13,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:13,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:13,092 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:13,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:38:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:13,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:38:13,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:14,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:14,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:14,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:14,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:14,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:14,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:38:14,161 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 02:38:14,161 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 [2021-11-13 02:38:14,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:38:14,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:38:14,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:38:14,673 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 02:38:14,673 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 [2021-11-13 02:38:16,253 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:38:16,253 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 [2021-11-13 02:38:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 02:38:16,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 02:38:17,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:17,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893284444] [2021-11-13 02:38:17,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893284444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:17,134 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:17,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 02:38:17,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611366585] [2021-11-13 02:38:17,135 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:17,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:38:17,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:38:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:38:17,137 INFO L87 Difference]: Start difference. First operand 1119 states and 1692 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:19,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:21,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:24,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:31,380 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:33,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:36,972 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:39,048 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:41,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:52,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:53,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:56,973 INFO L93 Difference]: Finished difference Result 4218 states and 6404 transitions. [2021-11-13 02:38:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:38:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-13 02:38:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:56,995 INFO L225 Difference]: With dead ends: 4218 [2021-11-13 02:38:56,995 INFO L226 Difference]: Without dead ends: 3109 [2021-11-13 02:38:56,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:38:56,999 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 377 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 86 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38737.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.16ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39604.19ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:57,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 600 Invalid, 642 Unknown, 0 Unchecked, 10.16ms Time], IncrementalHoareTripleChecker [86 Valid, 553 Invalid, 3 Unknown, 0 Unchecked, 39604.19ms Time] [2021-11-13 02:38:57,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-11-13 02:38:57,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1343. [2021-11-13 02:38:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 1.548435171385991) internal successors, (2078), 1342 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2078 transitions. [2021-11-13 02:38:57,098 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2078 transitions. Word has length 170 [2021-11-13 02:38:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:57,098 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 2078 transitions. [2021-11-13 02:38:57,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:38:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2078 transitions. [2021-11-13 02:38:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-13 02:38:57,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:57,121 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:57,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:57,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:57,336 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 437920303, now seen corresponding path program 1 times [2021-11-13 02:38:57,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:57,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500440033] [2021-11-13 02:38:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:57,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:57,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:57,338 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:57,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:38:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:58,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:58,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:38:58,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:38:58,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:38:58,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:38:58,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:38:58,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:38:58,588 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:38:58,589 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 [2021-11-13 02:39:00,019 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:39:00,020 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 [2021-11-13 02:39:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:39:00,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:39:00,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:00,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500440033] [2021-11-13 02:39:00,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500440033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:00,614 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:00,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:39:00,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429454790] [2021-11-13 02:39:00,614 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:00,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:39:00,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:00,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:39:00,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:39:00,615 INFO L87 Difference]: Start difference. First operand 1343 states and 2078 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:02,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:04,741 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:08,352 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:11,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:13,236 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 [] [2021-11-13 02:39:20,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:20,555 INFO L93 Difference]: Finished difference Result 3248 states and 5026 transitions. [2021-11-13 02:39:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:39:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 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 170 [2021-11-13 02:39:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:20,575 INFO L225 Difference]: With dead ends: 3248 [2021-11-13 02:39:20,576 INFO L226 Difference]: Without dead ends: 1915 [2021-11-13 02:39:20,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:39:20,579 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 110 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19337.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.39ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19766.81ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:20,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 615 Invalid, 240 Unknown, 0 Unchecked, 4.39ms Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 19766.81ms Time] [2021-11-13 02:39:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-11-13 02:39:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1595. [2021-11-13 02:39:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 1.5803011292346298) internal successors, (2519), 1594 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2519 transitions. [2021-11-13 02:39:20,675 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2519 transitions. Word has length 170 [2021-11-13 02:39:20,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:20,676 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2519 transitions. [2021-11-13 02:39:20,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2519 transitions. [2021-11-13 02:39:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-13 02:39:20,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:20,681 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:20,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:20,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:20,900 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2089364194, now seen corresponding path program 1 times [2021-11-13 02:39:20,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:20,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69060469] [2021-11-13 02:39:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:20,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:20,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:20,905 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:20,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:39:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:21,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:39:21,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:21,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:22,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:22,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:22,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:22,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:22,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:22,371 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:39:22,372 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 [2021-11-13 02:39:23,125 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:39:23,125 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 [2021-11-13 02:39:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:39:23,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:39:23,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:23,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69060469] [2021-11-13 02:39:23,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69060469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:23,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:23,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:39:23,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982921595] [2021-11-13 02:39:23,819 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:23,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:39:23,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:23,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:39:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:39:23,820 INFO L87 Difference]: Start difference. First operand 1595 states and 2519 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 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) [2021-11-13 02:39:25,853 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 [] [2021-11-13 02:39:29,552 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:31,557 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:37,644 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:39,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:42,933 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:44,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:48,266 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:50,280 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:57,184 INFO L93 Difference]: Finished difference Result 4734 states and 7391 transitions. [2021-11-13 02:39:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:39:57,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 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 183 [2021-11-13 02:39:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:57,208 INFO L225 Difference]: With dead ends: 4734 [2021-11-13 02:39:57,209 INFO L226 Difference]: Without dead ends: 3149 [2021-11-13 02:39:57,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:39:57,212 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 214 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32337.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.12ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33102.23ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:57,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 567 Invalid, 552 Unknown, 0 Unchecked, 7.12ms Time], IncrementalHoareTripleChecker [69 Valid, 481 Invalid, 2 Unknown, 0 Unchecked, 33102.23ms Time] [2021-11-13 02:39:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2021-11-13 02:39:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 1867. [2021-11-13 02:39:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.5819935691318328) internal successors, (2952), 1866 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:39:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2952 transitions. [2021-11-13 02:39:57,349 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2952 transitions. Word has length 183 [2021-11-13 02:39:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:57,349 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2952 transitions. [2021-11-13 02:39:57,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 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) [2021-11-13 02:39:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2952 transitions. [2021-11-13 02:39:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-13 02:39:57,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:57,355 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:57,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:57,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:57,568 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:57,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1261495379, now seen corresponding path program 1 times [2021-11-13 02:39:57,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:57,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195553816] [2021-11-13 02:39:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:57,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:57,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:57,570 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:57,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:39:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:39:58,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:58,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:39:58,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:58,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:58,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:58,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:58,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:39:59,083 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:39:59,084 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 [2021-11-13 02:39:59,540 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:39:59,540 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 [2021-11-13 02:39:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:39:59,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:40:00,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:00,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195553816] [2021-11-13 02:40:00,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195553816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:00,291 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:00,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:40:00,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071931722] [2021-11-13 02:40:00,291 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:00,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:40:00,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:00,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:40:00,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:40:00,293 INFO L87 Difference]: Start difference. First operand 1867 states and 2952 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:02,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:07,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:15,640 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:16,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:25,995 INFO L93 Difference]: Finished difference Result 5132 states and 8014 transitions. [2021-11-13 02:40:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:40:26,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-13 02:40:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:26,020 INFO L225 Difference]: With dead ends: 5132 [2021-11-13 02:40:26,020 INFO L226 Difference]: Without dead ends: 3275 [2021-11-13 02:40:26,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:40:26,024 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 223 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 67 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24793.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.97ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25450.14ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:26,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 525 Invalid, 529 Unknown, 0 Unchecked, 5.97ms Time], IncrementalHoareTripleChecker [67 Valid, 460 Invalid, 2 Unknown, 0 Unchecked, 25450.14ms Time] [2021-11-13 02:40:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2021-11-13 02:40:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 1966. [2021-11-13 02:40:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 1.5623409669211197) internal successors, (3070), 1965 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 3070 transitions. [2021-11-13 02:40:26,161 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 3070 transitions. Word has length 184 [2021-11-13 02:40:26,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:26,161 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 3070 transitions. [2021-11-13 02:40:26,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:26,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 3070 transitions. [2021-11-13 02:40:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-13 02:40:26,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:26,167 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:26,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:26,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:26,385 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:26,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1467880897, now seen corresponding path program 1 times [2021-11-13 02:40:26,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:26,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072651835] [2021-11-13 02:40:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:26,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:26,389 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:26,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:40:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:40:27,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:27,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:40:27,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:40:27,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:40:27,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:40:27,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:40:27,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:40:27,807 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:40:27,808 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 [2021-11-13 02:40:28,240 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:40:28,241 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 [2021-11-13 02:40:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:40:28,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:40:28,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:28,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072651835] [2021-11-13 02:40:28,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072651835] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:28,909 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:40:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728759823] [2021-11-13 02:40:28,910 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:28,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:40:28,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:40:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:40:28,912 INFO L87 Difference]: Start difference. First operand 1966 states and 3070 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:30,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:32,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:35,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:36,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:48,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:50,094 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:59,458 INFO L93 Difference]: Finished difference Result 5339 states and 8250 transitions. [2021-11-13 02:40:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:40:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-13 02:40:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:59,479 INFO L225 Difference]: With dead ends: 5339 [2021-11-13 02:40:59,480 INFO L226 Difference]: Without dead ends: 3383 [2021-11-13 02:40:59,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:40:59,484 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 220 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29506.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.05ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30282.11ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:59,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 596 Invalid, 548 Unknown, 0 Unchecked, 5.05ms Time], IncrementalHoareTripleChecker [66 Valid, 480 Invalid, 2 Unknown, 0 Unchecked, 30282.11ms Time] [2021-11-13 02:40:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-11-13 02:40:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 2074. [2021-11-13 02:40:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 1.542209358417752) internal successors, (3197), 2073 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3197 transitions. [2021-11-13 02:40:59,639 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3197 transitions. Word has length 184 [2021-11-13 02:40:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:59,639 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 3197 transitions. [2021-11-13 02:40:59,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:40:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3197 transitions. [2021-11-13 02:40:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-13 02:40:59,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:59,648 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:59,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:59,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:59,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:59,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2145835448, now seen corresponding path program 1 times [2021-11-13 02:40:59,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:59,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962366257] [2021-11-13 02:40:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:59,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:59,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:59,866 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:59,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:41:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:41:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:00,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:00,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:41:00,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:41:00,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:41:00,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:41:00,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:41:01,144 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:41:01,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-13 02:41:01,960 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:41:01,960 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 [2021-11-13 02:41:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:41:02,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:41:02,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:02,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962366257] [2021-11-13 02:41:02,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962366257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:02,643 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:02,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:41:02,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167105772] [2021-11-13 02:41:02,643 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:02,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:41:02,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:02,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:41:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:41:02,645 INFO L87 Difference]: Start difference. First operand 2074 states and 3197 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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) [2021-11-13 02:41:04,682 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:08,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:15,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:18,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:21,021 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:23,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:38,256 INFO L93 Difference]: Finished difference Result 5429 states and 8324 transitions. [2021-11-13 02:41:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:41:38,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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 184 [2021-11-13 02:41:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:38,279 INFO L225 Difference]: With dead ends: 5429 [2021-11-13 02:41:38,280 INFO L226 Difference]: Without dead ends: 3365 [2021-11-13 02:41:38,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:41:38,283 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 206 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34460.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.71ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35348.44ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:38,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 740 Invalid, 674 Unknown, 0 Unchecked, 4.71ms Time], IncrementalHoareTripleChecker [66 Valid, 606 Invalid, 2 Unknown, 0 Unchecked, 35348.44ms Time] [2021-11-13 02:41:38,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-11-13 02:41:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 2153. [2021-11-13 02:41:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 1.5385687732342008) internal successors, (3311), 2152 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3311 transitions. [2021-11-13 02:41:38,439 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3311 transitions. Word has length 184 [2021-11-13 02:41:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:38,439 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 3311 transitions. [2021-11-13 02:41:38,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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) [2021-11-13 02:41:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3311 transitions. [2021-11-13 02:41:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-13 02:41:38,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:38,446 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:38,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:38,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:38,660 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:38,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:38,660 INFO L85 PathProgramCache]: Analyzing trace with hash -174328440, now seen corresponding path program 1 times [2021-11-13 02:41:38,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:38,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349187142] [2021-11-13 02:41:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:38,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:38,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:38,662 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:38,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:41:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:39,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:41:39,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:41:39,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:41:39,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:41:39,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:41:39,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:41:39,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:41:40,146 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:41:40,146 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 [2021-11-13 02:41:40,923 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:41:40,923 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 [2021-11-13 02:41:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:41:41,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:41:41,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:41,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349187142] [2021-11-13 02:41:41,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349187142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:41,600 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:41,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:41:41,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41630340] [2021-11-13 02:41:41,601 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:41,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:41:41,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:41:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:41:41,603 INFO L87 Difference]: Start difference. First operand 2153 states and 3311 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:41:43,638 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:45,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:54,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:55,350 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:56,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:58,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:14,944 INFO L93 Difference]: Finished difference Result 5454 states and 8313 transitions. [2021-11-13 02:42:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:42:14,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-13 02:42:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:14,964 INFO L225 Difference]: With dead ends: 5454 [2021-11-13 02:42:14,964 INFO L226 Difference]: Without dead ends: 3311 [2021-11-13 02:42:14,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:42:14,968 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 208 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32333.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33083.53ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:14,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 524 Invalid, 537 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [69 Valid, 466 Invalid, 2 Unknown, 0 Unchecked, 33083.53ms Time] [2021-11-13 02:42:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-11-13 02:42:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2153. [2021-11-13 02:42:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 1.5223048327137547) internal successors, (3276), 2152 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3276 transitions. [2021-11-13 02:42:15,121 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3276 transitions. Word has length 184 [2021-11-13 02:42:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:15,122 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 3276 transitions. [2021-11-13 02:42:15,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3276 transitions. [2021-11-13 02:42:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-13 02:42:15,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:15,128 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:15,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:15,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:15,349 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:15,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1652102553, now seen corresponding path program 1 times [2021-11-13 02:42:15,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:15,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650608179] [2021-11-13 02:42:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:15,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:15,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:15,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:15,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:42:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:16,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:42:16,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:16,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:16,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:42:16,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:42:16,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:42:16,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:42:16,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:42:16,813 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:42:16,813 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 [2021-11-13 02:42:17,341 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:42:17,342 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 [2021-11-13 02:42:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:42:17,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:42:17,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:17,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650608179] [2021-11-13 02:42:17,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650608179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:17,991 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:17,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:42:17,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636088730] [2021-11-13 02:42:17,991 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:17,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:42:17,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:17,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:42:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:42:17,993 INFO L87 Difference]: Start difference. First operand 2153 states and 3276 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:20,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:29,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:33,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:34,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:40,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:47,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:49,093 INFO L93 Difference]: Finished difference Result 5562 states and 8423 transitions. [2021-11-13 02:42:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:42:49,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 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 185 [2021-11-13 02:42:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:49,109 INFO L225 Difference]: With dead ends: 5562 [2021-11-13 02:42:49,109 INFO L226 Difference]: Without dead ends: 3419 [2021-11-13 02:42:49,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:42:49,112 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 213 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30027.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30801.98ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:49,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 600 Invalid, 539 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [64 Valid, 474 Invalid, 1 Unknown, 0 Unchecked, 30801.98ms Time] [2021-11-13 02:42:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2021-11-13 02:42:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 2162. [2021-11-13 02:42:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 1.5039333641832484) internal successors, (3250), 2161 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 3250 transitions. [2021-11-13 02:42:49,271 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 3250 transitions. Word has length 185 [2021-11-13 02:42:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:49,271 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 3250 transitions. [2021-11-13 02:42:49,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 3250 transitions. [2021-11-13 02:42:49,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-13 02:42:49,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:49,278 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:49,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:49,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:49,499 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1026052826, now seen corresponding path program 1 times [2021-11-13 02:42:49,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:49,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524717132] [2021-11-13 02:42:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:49,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:49,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:49,502 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:49,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:42:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:50,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:42:50,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:50,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:42:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:42:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:42:50,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:42:50,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:42:50,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:42:51,135 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:42:51,135 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 [2021-11-13 02:42:51,736 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:42:51,737 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 [2021-11-13 02:42:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:42:51,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:42:52,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:52,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524717132] [2021-11-13 02:42:52,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524717132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:52,386 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:52,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:42:52,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632081142] [2021-11-13 02:42:52,386 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:52,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:42:52,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:52,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:42:52,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:42:52,387 INFO L87 Difference]: Start difference. First operand 2162 states and 3250 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:54,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:56,451 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:58,939 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:03,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:06,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:07,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:15,303 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:16,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:28,988 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:30,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:31,276 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:32,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:43:32,952 INFO L93 Difference]: Finished difference Result 5576 states and 8358 transitions. [2021-11-13 02:43:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:43:32,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-13 02:43:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:43:32,981 INFO L225 Difference]: With dead ends: 5576 [2021-11-13 02:43:32,981 INFO L226 Difference]: Without dead ends: 3424 [2021-11-13 02:43:32,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:43:32,984 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 201 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 45 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39348.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.32ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40300.77ms IncrementalHoareTripleChecker+Time [2021-11-13 02:43:32,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 1147 Invalid, 663 Unknown, 0 Unchecked, 4.32ms Time], IncrementalHoareTripleChecker [45 Valid, 615 Invalid, 3 Unknown, 0 Unchecked, 40300.77ms Time] [2021-11-13 02:43:32,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-11-13 02:43:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 2176. [2021-11-13 02:43:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 1.4845977011494254) internal successors, (3229), 2175 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:43:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 3229 transitions. [2021-11-13 02:43:33,119 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 3229 transitions. Word has length 186 [2021-11-13 02:43:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:43:33,120 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 3229 transitions. [2021-11-13 02:43:33,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:43:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 3229 transitions. [2021-11-13 02:43:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-13 02:43:33,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:43:33,125 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:43:33,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:43:33,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:43:33,340 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:43:33,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:43:33,340 INFO L85 PathProgramCache]: Analyzing trace with hash 237091604, now seen corresponding path program 1 times [2021-11-13 02:43:33,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:43:33,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454396344] [2021-11-13 02:43:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:43:33,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:43:33,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:43:33,342 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:43:33,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:43:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:43:34,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:43:34,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:34,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:43:34,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:43:34,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:43:34,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:43:34,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:43:34,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:43:34,691 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:43:34,691 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 [2021-11-13 02:43:35,331 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:43:35,331 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 [2021-11-13 02:43:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:43:35,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:43:35,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:43:35,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454396344] [2021-11-13 02:43:35,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454396344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:43:35,977 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:43:35,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:43:35,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723336077] [2021-11-13 02:43:35,978 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:43:35,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:43:35,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:43:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:43:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:43:35,979 INFO L87 Difference]: Start difference. First operand 2176 states and 3229 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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) [2021-11-13 02:43:38,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:47,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:51,463 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 [] [2021-11-13 02:44:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:01,176 INFO L93 Difference]: Finished difference Result 5405 states and 8027 transitions. [2021-11-13 02:44:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:44:01,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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 187 [2021-11-13 02:44:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:01,185 INFO L225 Difference]: With dead ends: 5405 [2021-11-13 02:44:01,185 INFO L226 Difference]: Without dead ends: 3244 [2021-11-13 02:44:01,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:44:01,190 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 201 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 64 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24295.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.13ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24926.17ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:01,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 510 Invalid, 511 Unknown, 0 Unchecked, 3.13ms Time], IncrementalHoareTripleChecker [64 Valid, 445 Invalid, 2 Unknown, 0 Unchecked, 24926.17ms Time] [2021-11-13 02:44:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2021-11-13 02:44:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 2176. [2021-11-13 02:44:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 1.464367816091954) internal successors, (3185), 2175 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:44:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 3185 transitions. [2021-11-13 02:44:01,331 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 3185 transitions. Word has length 187 [2021-11-13 02:44:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:01,331 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 3185 transitions. [2021-11-13 02:44:01,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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) [2021-11-13 02:44:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 3185 transitions. [2021-11-13 02:44:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-13 02:44:01,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:01,344 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:01,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:01,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:01,565 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2008453910, now seen corresponding path program 1 times [2021-11-13 02:44:01,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:01,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003176811] [2021-11-13 02:44:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:01,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:01,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:01,567 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:01,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:44:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:02,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:44:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:02,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:44:02,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:44:02,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:44:02,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:44:02,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:44:03,034 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:44:03,035 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 [2021-11-13 02:44:03,908 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:44:03,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 02:44:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:44:04,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:44:04,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:04,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003176811] [2021-11-13 02:44:04,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003176811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:04,657 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:04,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:44:04,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269680232] [2021-11-13 02:44:04,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:04,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:44:04,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:04,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:44:04,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:44:04,659 INFO L87 Difference]: Start difference. First operand 2176 states and 3185 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:44:06,678 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 [] [2021-11-13 02:44:12,283 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:44:13,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:44:17,357 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 [] [2021-11-13 02:44:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:33,025 INFO L93 Difference]: Finished difference Result 5381 states and 7897 transitions. [2021-11-13 02:44:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:44:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-13 02:44:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:33,032 INFO L225 Difference]: With dead ends: 5381 [2021-11-13 02:44:33,032 INFO L226 Difference]: Without dead ends: 3461 [2021-11-13 02:44:33,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:44:33,034 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 183 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 43 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27321.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.55ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28082.69ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:33,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 811 Invalid, 505 Unknown, 0 Unchecked, 3.55ms Time], IncrementalHoareTripleChecker [43 Valid, 460 Invalid, 2 Unknown, 0 Unchecked, 28082.69ms Time] [2021-11-13 02:44:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-11-13 02:44:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2356. [2021-11-13 02:44:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 1.4445859872611464) internal successors, (3402), 2355 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:44:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 3402 transitions. [2021-11-13 02:44:33,161 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 3402 transitions. Word has length 187 [2021-11-13 02:44:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:33,162 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 3402 transitions. [2021-11-13 02:44:33,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:44:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 3402 transitions. [2021-11-13 02:44:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-13 02:44:33,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:33,170 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:33,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:33,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:33,384 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash 462252043, now seen corresponding path program 1 times [2021-11-13 02:44:33,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:33,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685470233] [2021-11-13 02:44:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:33,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:33,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:33,388 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:33,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:44:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:34,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:44:34,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:34,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:44:34,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:44:34,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:44:34,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:44:34,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:44:34,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:44:34,780 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:44:34,780 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 [2021-11-13 02:44:35,686 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:44:35,686 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 [2021-11-13 02:44:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:44:35,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:44:36,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:36,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685470233] [2021-11-13 02:44:36,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685470233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:36,373 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:36,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:44:36,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145088477] [2021-11-13 02:44:36,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:36,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:44:36,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:36,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:44:36,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:44:36,375 INFO L87 Difference]: Start difference. First operand 2356 states and 3402 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:44:38,424 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 [] [2021-11-13 02:44:40,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:44:49,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:44:50,568 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:44:57,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:45:02,155 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 [] [2021-11-13 02:45:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:45:06,409 INFO L93 Difference]: Finished difference Result 5545 states and 8068 transitions. [2021-11-13 02:45:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:45:06,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-13 02:45:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:45:06,417 INFO L225 Difference]: With dead ends: 5545 [2021-11-13 02:45:06,417 INFO L226 Difference]: Without dead ends: 3466 [2021-11-13 02:45:06,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:45:06,420 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 188 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 62 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29005.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.13ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29728.48ms IncrementalHoareTripleChecker+Time [2021-11-13 02:45:06,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 515 Invalid, 518 Unknown, 0 Unchecked, 3.13ms Time], IncrementalHoareTripleChecker [62 Valid, 453 Invalid, 3 Unknown, 0 Unchecked, 29728.48ms Time] [2021-11-13 02:45:06,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3466 states. [2021-11-13 02:45:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3466 to 2378. [2021-11-13 02:45:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 1.4371055952881784) internal successors, (3416), 2377 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:45:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 3416 transitions. [2021-11-13 02:45:06,599 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 3416 transitions. Word has length 188 [2021-11-13 02:45:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:45:06,600 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 3416 transitions. [2021-11-13 02:45:06,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:45:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 3416 transitions. [2021-11-13 02:45:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 02:45:06,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:45:06,605 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:45:06,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:45:06,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:45:06,820 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:45:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:45:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 993833957, now seen corresponding path program 1 times [2021-11-13 02:45:06,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:45:06,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386447289] [2021-11-13 02:45:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:45:06,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:45:06,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:45:06,822 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:45:06,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:45:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:45:07,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:45:07,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:45:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:45:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:45:07,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:45:07,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:45:07,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:45:08,340 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:45:08,340 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 [2021-11-13 02:45:09,379 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:45:09,379 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 [2021-11-13 02:45:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:45:09,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:45:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:45:10,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:45:10,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386447289] [2021-11-13 02:45:10,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386447289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:45:10,049 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:45:10,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:45:10,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559963453] [2021-11-13 02:45:10,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:45:10,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:45:10,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:45:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:45:10,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:45:10,054 INFO L87 Difference]: Start difference. First operand 2378 states and 3416 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:45:12,094 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 [] [2021-11-13 02:45:28,110 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:45:29,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:45:31,921 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 [] [2021-11-13 02:45:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:45:41,848 INFO L93 Difference]: Finished difference Result 5714 states and 8243 transitions. [2021-11-13 02:45:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:45:41,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-13 02:45:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:45:41,858 INFO L225 Difference]: With dead ends: 5714 [2021-11-13 02:45:41,858 INFO L226 Difference]: Without dead ends: 3620 [2021-11-13 02:45:41,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:45:41,861 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 183 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30652.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31452.26ms IncrementalHoareTripleChecker+Time [2021-11-13 02:45:41,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 648 Invalid, 637 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [61 Valid, 575 Invalid, 1 Unknown, 0 Unchecked, 31452.26ms Time] [2021-11-13 02:45:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2021-11-13 02:45:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 2575. [2021-11-13 02:45:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2574 states have (on average 1.4176379176379177) internal successors, (3649), 2574 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:45:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3649 transitions. [2021-11-13 02:45:42,084 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3649 transitions. Word has length 189 [2021-11-13 02:45:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:45:42,084 INFO L470 AbstractCegarLoop]: Abstraction has 2575 states and 3649 transitions. [2021-11-13 02:45:42,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:45:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3649 transitions. [2021-11-13 02:45:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 02:45:42,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:45:42,090 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:45:42,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:45:42,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:45:42,313 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:45:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:45:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1722993591, now seen corresponding path program 1 times [2021-11-13 02:45:42,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:45:42,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918489446] [2021-11-13 02:45:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:45:42,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:45:42,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:45:42,316 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:45:42,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:45:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:45:43,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:45:43,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:45:43,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:45:43,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:45:43,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:45:43,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:45:43,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:45:43,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:45:43,762 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:45:43,763 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 [2021-11-13 02:45:44,829 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:45:44,829 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 [2021-11-13 02:45:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:45:45,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:45:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:45:45,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:45:45,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918489446] [2021-11-13 02:45:45,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918489446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:45:45,487 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:45:45,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:45:45,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742868148] [2021-11-13 02:45:45,487 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:45:45,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:45:45,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:45:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:45:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:45:45,489 INFO L87 Difference]: Start difference. First operand 2575 states and 3649 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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) [2021-11-13 02:45:47,511 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 [] [2021-11-13 02:46:04,130 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 [] [2021-11-13 02:46:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:46:16,829 INFO L93 Difference]: Finished difference Result 6339 states and 9028 transitions. [2021-11-13 02:46:16,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:46:16,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 192 [2021-11-13 02:46:16,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:46:16,839 INFO L225 Difference]: With dead ends: 6339 [2021-11-13 02:46:16,839 INFO L226 Difference]: Without dead ends: 3785 [2021-11-13 02:46:16,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:46:16,842 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 180 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30242.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.56ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31008.91ms IncrementalHoareTripleChecker+Time [2021-11-13 02:46:16,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 651 Invalid, 637 Unknown, 0 Unchecked, 3.56ms Time], IncrementalHoareTripleChecker [61 Valid, 575 Invalid, 1 Unknown, 0 Unchecked, 31008.91ms Time] [2021-11-13 02:46:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2021-11-13 02:46:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 2759. [2021-11-13 02:46:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2759 states, 2758 states have (on average 1.4006526468455403) internal successors, (3863), 2758 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:46:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2759 states to 2759 states and 3863 transitions. [2021-11-13 02:46:17,051 INFO L78 Accepts]: Start accepts. Automaton has 2759 states and 3863 transitions. Word has length 192 [2021-11-13 02:46:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:46:17,052 INFO L470 AbstractCegarLoop]: Abstraction has 2759 states and 3863 transitions. [2021-11-13 02:46:17,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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) [2021-11-13 02:46:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2759 states and 3863 transitions. [2021-11-13 02:46:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-13 02:46:17,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:46:17,057 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:46:17,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:46:17,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:46:17,272 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:46:17,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:46:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash -459825679, now seen corresponding path program 1 times [2021-11-13 02:46:17,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:46:17,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514696174] [2021-11-13 02:46:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:46:17,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:46:17,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:46:17,275 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:46:17,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:46:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:18,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:46:18,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:18,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:18,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:46:18,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:46:18,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:46:18,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:46:18,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:46:18,801 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:46:18,801 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 [2021-11-13 02:46:19,876 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:46:19,877 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 [2021-11-13 02:46:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:46:20,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:46:20,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:46:20,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514696174] [2021-11-13 02:46:20,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514696174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:46:20,556 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:46:20,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:46:20,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614716628] [2021-11-13 02:46:20,556 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:46:20,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:46:20,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:46:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:46:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:46:20,558 INFO L87 Difference]: Start difference. First operand 2759 states and 3863 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:46:22,607 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 [] [2021-11-13 02:46:31,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:46:33,263 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:46:36,771 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:46:38,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:46:40,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:46:45,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:46:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:46:51,591 INFO L93 Difference]: Finished difference Result 6469 states and 9140 transitions. [2021-11-13 02:46:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:46:51,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 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 193 [2021-11-13 02:46:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:46:51,596 INFO L225 Difference]: With dead ends: 6469 [2021-11-13 02:46:51,596 INFO L226 Difference]: Without dead ends: 3731 [2021-11-13 02:46:51,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:46:51,599 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 173 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29857.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.63ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30675.24ms IncrementalHoareTripleChecker+Time [2021-11-13 02:46:51,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 656 Invalid, 634 Unknown, 0 Unchecked, 3.63ms Time], IncrementalHoareTripleChecker [63 Valid, 570 Invalid, 1 Unknown, 0 Unchecked, 30675.24ms Time] [2021-11-13 02:46:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-11-13 02:46:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 2767. [2021-11-13 02:46:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 1.3929862617498192) internal successors, (3853), 2766 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:46:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 3853 transitions. [2021-11-13 02:46:51,835 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 3853 transitions. Word has length 193 [2021-11-13 02:46:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:46:51,836 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 3853 transitions. [2021-11-13 02:46:51,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:46:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 3853 transitions. [2021-11-13 02:46:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-13 02:46:51,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:46:51,841 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:46:51,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:46:52,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:46:52,065 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:46:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:46:52,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1522578341, now seen corresponding path program 1 times [2021-11-13 02:46:52,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:46:52,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825809324] [2021-11-13 02:46:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:46:52,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:46:52,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:46:52,068 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:46:52,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:46:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:46:53,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:46:53,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:46:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:46:53,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:46:53,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:46:53,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:46:53,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:46:53,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:46:53,595 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 02:46:53,595 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 [2021-11-13 02:46:55,003 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 02:46:55,004 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 [2021-11-13 02:46:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:46:55,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:46:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 02:46:55,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:46:55,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825809324] [2021-11-13 02:46:55,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825809324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:46:55,913 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:46:55,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:46:55,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899819629] [2021-11-13 02:46:55,914 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:46:55,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:46:55,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:46:55,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:46:55,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:46:55,916 INFO L87 Difference]: Start difference. First operand 2767 states and 3853 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:46:57,947 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:46:59,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:47:07,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:47:12,172 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:47:13,896 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:47:16,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:47:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:47:25,974 INFO L93 Difference]: Finished difference Result 6428 states and 9040 transitions. [2021-11-13 02:47:25,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:47:25,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 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 193 [2021-11-13 02:47:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:47:25,979 INFO L225 Difference]: With dead ends: 6428 [2021-11-13 02:47:25,979 INFO L226 Difference]: Without dead ends: 3682 [2021-11-13 02:47:25,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:47:25,981 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 161 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29049.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.01ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29723.19ms IncrementalHoareTripleChecker+Time [2021-11-13 02:47:25,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 516 Invalid, 499 Unknown, 0 Unchecked, 3.01ms Time], IncrementalHoareTripleChecker [62 Valid, 435 Invalid, 2 Unknown, 0 Unchecked, 29723.19ms Time] [2021-11-13 02:47:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2021-11-13 02:47:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 2784. [2021-11-13 02:47:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2783 states have (on average 1.3902263744160976) internal successors, (3869), 2783 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:47:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3869 transitions. [2021-11-13 02:47:26,201 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3869 transitions. Word has length 193 [2021-11-13 02:47:26,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:47:26,201 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 3869 transitions. [2021-11-13 02:47:26,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:47:26,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3869 transitions. [2021-11-13 02:47:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 02:47:26,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:47:26,207 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:47:26,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:47:26,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:47:26,428 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:47:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:47:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash -424111708, now seen corresponding path program 1 times [2021-11-13 02:47:26,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:47:26,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894083106] [2021-11-13 02:47:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:47:26,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:47:26,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:47:26,430 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:47:26,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76fd3943-533c-4637-96cf-b23d94789040/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 02:47:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:47:27,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:47:27,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:47:27,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 138 [2021-11-13 02:47:27,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 90 [2021-11-13 02:47:27,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:47:27,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:47:27,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:47:27,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:47:27,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:47:27,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:47:27,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 02:47:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver