./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/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 6fed4ea6707efb0c46113b7defb1e72bb9bbe71f593886f20a58e457577f3a05 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:12:18,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:12:18,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:12:18,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:12:18,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:12:18,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:12:18,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:12:18,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:12:18,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:12:18,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:12:18,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:12:18,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:12:18,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:12:18,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:12:18,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:12:18,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:12:18,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:12:18,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:12:18,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:12:18,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:12:18,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:12:18,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:12:18,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:12:18,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:12:18,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:12:18,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:12:18,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:12:18,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:12:18,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:12:18,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:12:18,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:12:18,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:12:18,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:12:18,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:12:18,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:12:18,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:12:18,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:12:18,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:12:18,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:12:19,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:12:19,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:12:19,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:12:19,038 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:12:19,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:12:19,040 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:12:19,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:12:19,041 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:12:19,042 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:12:19,042 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:12:19,043 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:12:19,043 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:12:19,044 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:12:19,044 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:12:19,045 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:12:19,045 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:12:19,046 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:12:19,046 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:12:19,047 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:12:19,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:12:19,049 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:12:19,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:12:19,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:12:19,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:12:19,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:12:19,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:12:19,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:12:19,051 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:12:19,051 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:12:19,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:12:19,052 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:12:19,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:12:19,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:12:19,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:12:19,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:12:19,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:12:19,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:12:19,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:12:19,055 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:12:19,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:12:19,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:12:19,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:12:19,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:12:19,056 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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fed4ea6707efb0c46113b7defb1e72bb9bbe71f593886f20a58e457577f3a05 [2021-11-12 23:12:19,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:12:19,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:12:19,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:12:19,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:12:19,407 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:12:19,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c [2021-11-12 23:12:19,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/data/60592ad9a/96f27e43e30040dabeb3119658ff64f1/FLAGfab8ea444 [2021-11-12 23:12:20,239 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:12:20,241 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c [2021-11-12 23:12:20,296 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/data/60592ad9a/96f27e43e30040dabeb3119658ff64f1/FLAGfab8ea444 [2021-11-12 23:12:20,426 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/data/60592ad9a/96f27e43e30040dabeb3119658ff64f1 [2021-11-12 23:12:20,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:12:20,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:12:20,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:12:20,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:12:20,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:12:20,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:12:20" (1/1) ... [2021-11-12 23:12:20,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f020ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:20, skipping insertion in model container [2021-11-12 23:12:20,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:12:20" (1/1) ... [2021-11-12 23:12:20,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:12:20,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:12:21,052 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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c[75166,75179] [2021-11-12 23:12:21,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:12:21,101 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:12:21,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e1c4d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:21, skipping insertion in model container [2021-11-12 23:12:21,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:12:21,103 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:12:21,105 INFO L158 Benchmark]: Toolchain (without parser) took 674.00ms. Allocated memory is still 94.4MB. Free memory was 57.2MB in the beginning and 59.2MB in the end (delta: -2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:12:21,106 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 94.4MB. Free memory was 63.8MB in the beginning and 63.8MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:12:21,107 INFO L158 Benchmark]: CACSL2BoogieTranslator took 670.86ms. Allocated memory is still 94.4MB. Free memory was 57.0MB in the beginning and 59.2MB in the end (delta: -2.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:12:21,110 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 94.4MB. Free memory was 63.8MB in the beginning and 63.8MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 670.86ms. Allocated memory is still 94.4MB. Free memory was 57.0MB in the beginning and 59.2MB in the end (delta: -2.2MB). 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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/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 6fed4ea6707efb0c46113b7defb1e72bb9bbe71f593886f20a58e457577f3a05 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:12:23,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:12:23,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:12:23,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:12:23,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:12:23,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:12:23,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:12:23,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:12:23,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:12:23,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:12:23,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:12:23,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:12:23,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:12:23,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:12:23,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:12:23,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:12:23,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:12:23,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:12:23,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:12:23,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:12:23,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:12:23,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:12:23,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:12:23,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:12:23,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:12:23,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:12:23,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:12:23,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:12:23,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:12:23,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:12:23,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:12:23,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:12:23,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:12:23,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:12:23,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:12:23,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:12:23,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:12:23,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:12:23,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:12:23,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:12:23,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:12:23,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:12:23,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:12:23,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:12:23,923 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:12:23,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:12:23,924 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:12:23,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:12:23,925 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:12:23,925 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:12:23,926 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:12:23,926 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:12:23,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:12:23,928 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:12:23,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:12:23,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:12:23,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:12:23,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:12:23,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:12:23,931 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:12:23,931 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:12:23,931 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:12:23,932 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:12:23,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:12:23,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:12:23,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:12:23,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:12:23,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:12:23,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:12:23,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:12:23,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:12:23,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:12:23,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:12:23,935 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:12:23,935 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:12:23,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:12:23,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:12:23,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:12:23,937 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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fed4ea6707efb0c46113b7defb1e72bb9bbe71f593886f20a58e457577f3a05 [2021-11-12 23:12:24,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:12:24,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:12:24,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:12:24,458 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:12:24,459 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:12:24,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c [2021-11-12 23:12:24,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/data/dea64d37c/fc1c7929e14e410f9d5bded94e719653/FLAG2db580867 [2021-11-12 23:12:25,351 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:12:25,352 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c [2021-11-12 23:12:25,396 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/data/dea64d37c/fc1c7929e14e410f9d5bded94e719653/FLAG2db580867 [2021-11-12 23:12:25,535 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/data/dea64d37c/fc1c7929e14e410f9d5bded94e719653 [2021-11-12 23:12:25,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:12:25,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:12:25,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:12:25,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:12:25,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:12:25,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:12:25" (1/1) ... [2021-11-12 23:12:25,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6145665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:25, skipping insertion in model container [2021-11-12 23:12:25,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:12:25" (1/1) ... [2021-11-12 23:12:25,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:12:25,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:12:26,237 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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c[75166,75179] [2021-11-12 23:12:26,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:12:26,273 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:12:26,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:12:26,519 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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c[75166,75179] [2021-11-12 23:12:26,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:12:26,533 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:12:26,730 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_e3df7e4a-db6b-453b-83a9-e3b803e452d8/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c[75166,75179] [2021-11-12 23:12:26,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:12:26,766 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:12:26,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26 WrapperNode [2021-11-12 23:12:26,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:12:26,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:12:26,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:12:26,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:12:26,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (1/1) ... [2021-11-12 23:12:26,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (1/1) ... [2021-11-12 23:12:26,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:12:26,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:12:26,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:12:26,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:12:26,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (1/1) ... [2021-11-12 23:12:26,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (1/1) ... [2021-11-12 23:12:26,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (1/1) ... [2021-11-12 23:12:26,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (1/1) ... [2021-11-12 23:12:27,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (1/1) ... [2021-11-12 23:12:27,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (1/1) ... [2021-11-12 23:12:27,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (1/1) ... [2021-11-12 23:12:27,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:12:27,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:12:27,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:12:27,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:12:27,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (1/1) ... [2021-11-12 23:12:27,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:12:27,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:12:27,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:12:27,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:12:27,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:12:27,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:12:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:12:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:12:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:12:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:12:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:12:27,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:12:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:12:27,517 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:12:39,391 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-12 23:12:39,392 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-12 23:12:39,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:12:39,408 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:12:39,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:12:39 BoogieIcfgContainer [2021-11-12 23:12:39,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:12:39,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:12:39,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:12:39,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:12:39,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:12:25" (1/3) ... [2021-11-12 23:12:39,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fbec1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:12:39, skipping insertion in model container [2021-11-12 23:12:39,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:26" (2/3) ... [2021-11-12 23:12:39,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fbec1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:12:39, skipping insertion in model container [2021-11-12 23:12:39,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:12:39" (3/3) ... [2021-11-12 23:12:39,427 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.12.i.cil-1.c [2021-11-12 23:12:39,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:12:39,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:12:39,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:12:39,523 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:12:39,524 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:12:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 150 states have (on average 1.72) internal successors, (258), 151 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-12 23:12:39,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:39,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:39,555 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:39,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1692197635, now seen corresponding path program 1 times [2021-11-12 23:12:39,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:39,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685576716] [2021-11-12 23:12:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:39,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:39,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:39,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:39,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:12:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:40,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:12:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:40,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:12:40,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:12:40,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:40,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 23:12:40,452 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:40,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 23:12:40,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-12 23:12:41,249 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-12 23:12:41,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 1289 treesize of output 1241 [2021-11-12 23:12:41,450 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:41,453 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 23:12:41,465 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:41,475 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 23:12:41,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-12 23:12:41,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,707 INFO L244 Elim1Store]: Index analysis took 105 ms [2021-11-12 23:12:41,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-12 23:12:41,882 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-12 23:12:41,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 23:12:41,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:41,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 23:12:41,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-12 23:12:41,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-12 23:12:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:12:42,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:12:42,375 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:42,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-12 23:12:42,385 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:42,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 23:12:42,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:42,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-12 23:12:42,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:42,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-12 23:12:42,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:42,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-12 23:12:42,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:42,649 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-12 23:12:42,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:42,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-12 23:12:42,732 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:12:42,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-12 23:12:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:12:43,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:12:43,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685576716] [2021-11-12 23:12:43,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685576716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:43,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:43,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:12:43,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086900191] [2021-11-12 23:12:43,465 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:43,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:12:43,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:12:43,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:12:43,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:12:43,515 INFO L87 Difference]: Start difference. First operand has 152 states, 150 states have (on average 1.72) internal successors, (258), 151 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:45,568 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:12:49,628 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 [] [2021-11-12 23:12:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:53,526 INFO L93 Difference]: Finished difference Result 305 states and 515 transitions. [2021-11-12 23:12:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:12:53,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-12 23:12:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:53,543 INFO L225 Difference]: With dead ends: 305 [2021-11-12 23:12:53,546 INFO L226 Difference]: Without dead ends: 139 [2021-11-12 23:12:53,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:12:53,570 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 16 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9617.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 9889.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:53,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1091 Invalid, 190 Unknown, 0 Unchecked, 10.51ms Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 1 Unknown, 66 Unchecked, 9889.06ms Time] [2021-11-12 23:12:53,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-12 23:12:53,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-12 23:12:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5434782608695652) internal successors, (213), 138 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 213 transitions. [2021-11-12 23:12:53,653 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 213 transitions. Word has length 43 [2021-11-12 23:12:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:53,654 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 213 transitions. [2021-11-12 23:12:53,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:53,654 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 213 transitions. [2021-11-12 23:12:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-12 23:12:53,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:53,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:53,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:12:53,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:12:53,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:53,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2115844357, now seen corresponding path program 1 times [2021-11-12 23:12:53,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:12:53,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149516356] [2021-11-12 23:12:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:53,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:12:53,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:12:53,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:12:53,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:12:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:12:54,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:12:54,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:54,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:54,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:54,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:54,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:12:54,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:12:54,977 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:12:54,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:12:58,615 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:12:58,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:13:06,803 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:13:06,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:13:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:13:06,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:13:15,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:15,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149516356] [2021-11-12 23:13:15,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149516356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:15,277 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:15,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-12 23:13:15,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729164780] [2021-11-12 23:13:15,277 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:15,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:13:15,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:13:15,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:13:15,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-12 23:13:15,280 INFO L87 Difference]: Start difference. First operand 139 states and 213 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:17,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:13:19,001 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 [] [2021-11-12 23:13:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:24,176 INFO L93 Difference]: Finished difference Result 283 states and 437 transitions. [2021-11-12 23:13:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:13:24,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 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 43 [2021-11-12 23:13:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:24,182 INFO L225 Difference]: With dead ends: 283 [2021-11-12 23:13:24,182 INFO L226 Difference]: Without dead ends: 154 [2021-11-12 23:13:24,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-12 23:13:24,185 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 26 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8631.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 8868.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:24,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 604 Invalid, 192 Unknown, 0 Unchecked, 3.82ms Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 1 Unknown, 103 Unchecked, 8868.14ms Time] [2021-11-12 23:13:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-12 23:13:24,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2021-11-12 23:13:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.5570469798657718) internal successors, (232), 149 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 232 transitions. [2021-11-12 23:13:24,202 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 232 transitions. Word has length 43 [2021-11-12 23:13:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:24,203 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 232 transitions. [2021-11-12 23:13:24,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 232 transitions. [2021-11-12 23:13:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-12 23:13:24,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:24,206 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:24,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:24,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:13:24,411 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1636123909, now seen corresponding path program 1 times [2021-11-12 23:13:24,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:24,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255082184] [2021-11-12 23:13:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:24,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:24,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:24,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:24,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:13:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:24,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:13:24,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:24,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:24,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:24,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:24,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:24,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:24,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:13:25,420 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:13:25,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:13:28,856 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:13:28,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:13:36,260 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:13:36,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:13:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:13:36,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:13:36,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:36,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255082184] [2021-11-12 23:13:36,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255082184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:36,772 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:36,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:13:36,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459731211] [2021-11-12 23:13:36,773 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:36,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:13:36,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:13:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:13:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:13:36,775 INFO L87 Difference]: Start difference. First operand 150 states and 232 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:37,072 INFO L93 Difference]: Finished difference Result 281 states and 434 transitions. [2021-11-12 23:13:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:13:37,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 56 [2021-11-12 23:13:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:37,075 INFO L225 Difference]: With dead ends: 281 [2021-11-12 23:13:37,075 INFO L226 Difference]: Without dead ends: 152 [2021-11-12 23:13:37,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:13:37,077 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 12 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 285.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:37,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 723 Invalid, 197 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 193 Unchecked, 285.69ms Time] [2021-11-12 23:13:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-12 23:13:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-11-12 23:13:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.5503355704697988) internal successors, (231), 149 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 231 transitions. [2021-11-12 23:13:37,091 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 231 transitions. Word has length 56 [2021-11-12 23:13:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:37,092 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 231 transitions. [2021-11-12 23:13:37,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 231 transitions. [2021-11-12 23:13:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:13:37,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:37,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:37,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:37,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:13:37,311 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:37,311 INFO L85 PathProgramCache]: Analyzing trace with hash -301361520, now seen corresponding path program 1 times [2021-11-12 23:13:37,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:37,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636437605] [2021-11-12 23:13:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:37,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:37,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:37,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:37,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:13:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:37,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:13:37,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:37,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:37,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:37,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:37,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:37,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:13:38,358 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:13:38,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:13:41,770 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:13:41,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:13:48,642 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:13:48,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:13:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:13:48,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:13:49,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:49,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636437605] [2021-11-12 23:13:49,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636437605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:49,199 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:49,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:13:49,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63880564] [2021-11-12 23:13:49,200 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:49,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:13:49,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:13:49,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:13:49,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:13:49,202 INFO L87 Difference]: Start difference. First operand 150 states and 231 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:50,372 INFO L93 Difference]: Finished difference Result 279 states and 431 transitions. [2021-11-12 23:13:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:13:50,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 57 [2021-11-12 23:13:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:50,374 INFO L225 Difference]: With dead ends: 279 [2021-11-12 23:13:50,375 INFO L226 Difference]: Without dead ends: 150 [2021-11-12 23:13:50,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:13:50,377 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 10 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1131.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.86ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1157.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:50,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 834 Invalid, 108 Unknown, 0 Unchecked, 2.86ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 101 Unchecked, 1157.07ms Time] [2021-11-12 23:13:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-12 23:13:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-12 23:13:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.5436241610738255) internal successors, (230), 149 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 230 transitions. [2021-11-12 23:13:50,390 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 230 transitions. Word has length 57 [2021-11-12 23:13:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:50,390 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 230 transitions. [2021-11-12 23:13:50,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 230 transitions. [2021-11-12 23:13:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:13:50,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:50,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:50,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:13:50,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:13:50,615 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:50,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1304983516, now seen corresponding path program 1 times [2021-11-12 23:13:50,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:50,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716595078] [2021-11-12 23:13:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:50,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:50,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:50,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:50,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:13:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:51,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:13:51,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:51,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:51,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:51,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:51,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:51,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:13:51,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:13:51,720 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:13:51,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:13:55,201 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:13:55,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:14:02,005 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:14:02,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:14:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:02,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:02,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:02,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716595078] [2021-11-12 23:14:02,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716595078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:02,530 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:02,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:14:02,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839259866] [2021-11-12 23:14:02,530 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:02,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:14:02,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:14:02,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:14:02,532 INFO L87 Difference]: Start difference. First operand 150 states and 230 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:04,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:14:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:07,956 INFO L93 Difference]: Finished difference Result 302 states and 463 transitions. [2021-11-12 23:14:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:14:07,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:14:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:07,960 INFO L225 Difference]: With dead ends: 302 [2021-11-12 23:14:07,961 INFO L226 Difference]: Without dead ends: 173 [2021-11-12 23:14:07,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:14:07,962 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 35 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5228.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 5407.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:07,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 530 Invalid, 177 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [30 Valid, 105 Invalid, 1 Unknown, 41 Unchecked, 5407.87ms Time] [2021-11-12 23:14:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-12 23:14:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 162. [2021-11-12 23:14:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.5341614906832297) internal successors, (247), 161 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 247 transitions. [2021-11-12 23:14:07,976 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 247 transitions. Word has length 57 [2021-11-12 23:14:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:07,977 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 247 transitions. [2021-11-12 23:14:07,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 247 transitions. [2021-11-12 23:14:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:14:07,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:07,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:08,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 23:14:08,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:14:08,195 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2122058939, now seen corresponding path program 1 times [2021-11-12 23:14:08,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:08,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287675612] [2021-11-12 23:14:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:08,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:08,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:08,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:08,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:14:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:08,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:14:08,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:08,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:14:09,101 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:14:09,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:14:12,510 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:14:12,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:14:20,093 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:14:20,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:14:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:20,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:20,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:20,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287675612] [2021-11-12 23:14:20,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287675612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:20,666 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:20,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:14:20,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696940535] [2021-11-12 23:14:20,666 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:20,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:14:20,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:14:20,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:14:20,668 INFO L87 Difference]: Start difference. First operand 162 states and 247 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:22,191 INFO L93 Difference]: Finished difference Result 320 states and 489 transitions. [2021-11-12 23:14:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:14:22,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:14:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:22,194 INFO L225 Difference]: With dead ends: 320 [2021-11-12 23:14:22,194 INFO L226 Difference]: Without dead ends: 179 [2021-11-12 23:14:22,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:14:22,196 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 10 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1492.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1512.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:22,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 929 Invalid, 109 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 102 Unchecked, 1512.78ms Time] [2021-11-12 23:14:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-12 23:14:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2021-11-12 23:14:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.5227272727272727) internal successors, (268), 176 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 268 transitions. [2021-11-12 23:14:22,207 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 268 transitions. Word has length 57 [2021-11-12 23:14:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:22,208 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 268 transitions. [2021-11-12 23:14:22,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 268 transitions. [2021-11-12 23:14:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:14:22,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:22,210 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:22,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 23:14:22,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:14:22,426 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:22,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1437563525, now seen corresponding path program 1 times [2021-11-12 23:14:22,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:22,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813226838] [2021-11-12 23:14:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:22,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:22,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:22,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:22,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:14:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:22,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:14:22,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:22,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:22,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:22,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:22,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:22,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:22,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:14:23,326 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:14:23,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:14:26,707 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:14:26,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:14:34,133 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:14:34,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:14:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:34,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:34,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:34,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813226838] [2021-11-12 23:14:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813226838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:34,588 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:34,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:14:34,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300304091] [2021-11-12 23:14:34,588 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:34,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:14:34,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:34,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:14:34,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:14:34,589 INFO L87 Difference]: Start difference. First operand 177 states and 268 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:36,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:14:39,218 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:14:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:42,875 INFO L93 Difference]: Finished difference Result 340 states and 520 transitions. [2021-11-12 23:14:42,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:14:42,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:14:42,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:42,879 INFO L225 Difference]: With dead ends: 340 [2021-11-12 23:14:42,879 INFO L226 Difference]: Without dead ends: 199 [2021-11-12 23:14:42,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:14:42,880 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 29 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8081.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 8266.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:42,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 700 Invalid, 323 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 1 Unknown, 203 Unchecked, 8266.53ms Time] [2021-11-12 23:14:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-12 23:14:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 194. [2021-11-12 23:14:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.5233160621761659) internal successors, (294), 193 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 294 transitions. [2021-11-12 23:14:42,901 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 294 transitions. Word has length 57 [2021-11-12 23:14:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:42,901 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 294 transitions. [2021-11-12 23:14:42,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 294 transitions. [2021-11-12 23:14:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:14:42,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:42,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:42,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:43,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:14:43,120 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:43,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1729007683, now seen corresponding path program 1 times [2021-11-12 23:14:43,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:43,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398065922] [2021-11-12 23:14:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:43,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:43,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:43,125 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:43,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:14:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:43,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:14:43,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:43,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:43,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:43,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:43,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:14:43,942 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:14:43,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:14:47,265 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:14:47,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:14:54,943 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:14:54,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:14:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:55,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:14:55,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:55,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398065922] [2021-11-12 23:14:55,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398065922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:55,404 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:55,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:14:55,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140824132] [2021-11-12 23:14:55,404 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:55,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:14:55,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:55,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:14:55,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:14:55,406 INFO L87 Difference]: Start difference. First operand 194 states and 294 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:57,432 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:04,679 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:05,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:09,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:09,399 INFO L93 Difference]: Finished difference Result 358 states and 547 transitions. [2021-11-12 23:15:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:15:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:15:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:09,403 INFO L225 Difference]: With dead ends: 358 [2021-11-12 23:15:09,403 INFO L226 Difference]: Without dead ends: 200 [2021-11-12 23:15:09,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-12 23:15:09,405 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 45 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9624.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.59ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 9839.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:09,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 850 Invalid, 296 Unknown, 0 Unchecked, 3.59ms Time], IncrementalHoareTripleChecker [31 Valid, 116 Invalid, 1 Unknown, 148 Unchecked, 9839.46ms Time] [2021-11-12 23:15:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-12 23:15:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 180. [2021-11-12 23:15:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.5307262569832403) internal successors, (274), 179 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 274 transitions. [2021-11-12 23:15:09,416 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 274 transitions. Word has length 57 [2021-11-12 23:15:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:09,417 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 274 transitions. [2021-11-12 23:15:09,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 274 transitions. [2021-11-12 23:15:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:15:09,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:09,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:09,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-12 23:15:09,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:09,630 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash -199560092, now seen corresponding path program 1 times [2021-11-12 23:15:09,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:09,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593163748] [2021-11-12 23:15:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:09,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:09,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:09,633 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:09,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:15:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:10,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:15:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:10,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:10,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:10,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:10,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:10,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:10,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:10,661 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:15:10,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:15:14,063 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:15:14,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:15:21,062 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:15:21,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:15:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:21,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:21,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:21,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593163748] [2021-11-12 23:15:21,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593163748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:21,508 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:21,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:15:21,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178210301] [2021-11-12 23:15:21,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:21,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:15:21,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:21,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:15:21,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:15:21,510 INFO L87 Difference]: Start difference. First operand 180 states and 274 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:22,081 INFO L93 Difference]: Finished difference Result 349 states and 534 transitions. [2021-11-12 23:15:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:15:22,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 23:15:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:22,087 INFO L225 Difference]: With dead ends: 349 [2021-11-12 23:15:22,087 INFO L226 Difference]: Without dead ends: 190 [2021-11-12 23:15:22,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:15:22,089 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 6 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 540.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 559.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:22,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 950 Invalid, 109 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 102 Unchecked, 559.33ms Time] [2021-11-12 23:15:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-12 23:15:22,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-11-12 23:15:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.5132275132275133) internal successors, (286), 189 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 286 transitions. [2021-11-12 23:15:22,106 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 286 transitions. Word has length 58 [2021-11-12 23:15:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:22,107 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 286 transitions. [2021-11-12 23:15:22,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 286 transitions. [2021-11-12 23:15:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:15:22,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:22,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:22,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:22,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:22,310 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:22,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:22,311 INFO L85 PathProgramCache]: Analyzing trace with hash 676458914, now seen corresponding path program 1 times [2021-11-12 23:15:22,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:22,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576868906] [2021-11-12 23:15:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:22,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:22,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:22,312 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:22,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:15:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:22,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:22,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:22,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:22,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:22,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576868906] [2021-11-12 23:15:22,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576868906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:22,988 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:22,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:15:22,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652851912] [2021-11-12 23:15:22,989 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:22,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:15:22,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:15:22,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:15:22,990 INFO L87 Difference]: Start difference. First operand 190 states and 286 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:23,047 INFO L93 Difference]: Finished difference Result 667 states and 1023 transitions. [2021-11-12 23:15:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:15:23,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 23:15:23,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:23,052 INFO L225 Difference]: With dead ends: 667 [2021-11-12 23:15:23,052 INFO L226 Difference]: Without dead ends: 508 [2021-11-12 23:15:23,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:15:23,054 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 574 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.96ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:23,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 635 Invalid, 13 Unknown, 0 Unchecked, 2.96ms Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 32.21ms Time] [2021-11-12 23:15:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-12 23:15:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 350. [2021-11-12 23:15:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.518624641833811) internal successors, (530), 349 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 530 transitions. [2021-11-12 23:15:23,077 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 530 transitions. Word has length 58 [2021-11-12 23:15:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:23,077 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 530 transitions. [2021-11-12 23:15:23,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 530 transitions. [2021-11-12 23:15:23,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:15:23,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:23,080 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:23,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:23,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:23,299 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:23,300 INFO L85 PathProgramCache]: Analyzing trace with hash -220934364, now seen corresponding path program 1 times [2021-11-12 23:15:23,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:23,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917568606] [2021-11-12 23:15:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:23,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:23,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:23,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:23,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:15:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:23,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:15:23,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:23,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:23,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:23,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:23,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:23,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:23,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:24,356 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:15:24,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:15:27,783 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:15:27,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:15:34,874 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:15:34,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:15:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:35,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:35,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:35,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917568606] [2021-11-12 23:15:35,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917568606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:35,405 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:35,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:15:35,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827291722] [2021-11-12 23:15:35,406 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:35,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:15:35,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:35,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:15:35,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:15:35,408 INFO L87 Difference]: Start difference. First operand 350 states and 530 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:37,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:42,917 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:46,048 INFO L93 Difference]: Finished difference Result 687 states and 1044 transitions. [2021-11-12 23:15:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:15:46,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 23:15:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:46,054 INFO L225 Difference]: With dead ends: 687 [2021-11-12 23:15:46,054 INFO L226 Difference]: Without dead ends: 374 [2021-11-12 23:15:46,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=22, Invalid=33, Unknown=1, NotChecked=0, Total=56 [2021-11-12 23:15:46,056 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 31 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6304.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 6525.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:46,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 674 Invalid, 298 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [30 Valid, 109 Invalid, 1 Unknown, 158 Unchecked, 6525.82ms Time] [2021-11-12 23:15:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-12 23:15:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 352. [2021-11-12 23:15:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.5128205128205128) internal successors, (531), 351 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 531 transitions. [2021-11-12 23:15:46,079 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 531 transitions. Word has length 58 [2021-11-12 23:15:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:46,079 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 531 transitions. [2021-11-12 23:15:46,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 531 transitions. [2021-11-12 23:15:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:15:46,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:46,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:46,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:46,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:46,296 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -204940119, now seen corresponding path program 1 times [2021-11-12 23:15:46,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:46,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004636988] [2021-11-12 23:15:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:46,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:46,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:46,298 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:46,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:15:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:15:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:46,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:46,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:46,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:46,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:46,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:47,308 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:15:47,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:15:50,634 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:15:50,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:15:57,638 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:15:57,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:15:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:57,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:15:58,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:58,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004636988] [2021-11-12 23:15:58,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004636988] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:58,162 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:58,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:15:58,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468759048] [2021-11-12 23:15:58,163 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:58,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:15:58,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:58,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:15:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:15:58,164 INFO L87 Difference]: Start difference. First operand 352 states and 531 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:58,703 INFO L93 Difference]: Finished difference Result 667 states and 1016 transitions. [2021-11-12 23:15:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:15:58,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 23:15:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:58,707 INFO L225 Difference]: With dead ends: 667 [2021-11-12 23:15:58,707 INFO L226 Difference]: Without dead ends: 352 [2021-11-12 23:15:58,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:15:58,709 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 10 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 507.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.95ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 522.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:58,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 622 Invalid, 106 Unknown, 0 Unchecked, 0.95ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 102 Unchecked, 522.96ms Time] [2021-11-12 23:15:58,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-12 23:15:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-12 23:15:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.5071225071225072) internal successors, (529), 351 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 529 transitions. [2021-11-12 23:15:58,730 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 529 transitions. Word has length 59 [2021-11-12 23:15:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:58,730 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 529 transitions. [2021-11-12 23:15:58,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 529 transitions. [2021-11-12 23:15:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:15:58,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:58,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:58,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:58,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:58,946 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:58,946 INFO L85 PathProgramCache]: Analyzing trace with hash -285488759, now seen corresponding path program 1 times [2021-11-12 23:15:58,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:58,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59954532] [2021-11-12 23:15:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:58,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:58,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:58,948 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:58,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:15:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:59,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:15:59,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:59,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:59,831 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:15:59,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:16:03,158 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:16:03,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:16:10,283 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:16:10,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:16:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:10,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:10,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:10,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59954532] [2021-11-12 23:16:10,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59954532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:10,706 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:10,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:16:10,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757643573] [2021-11-12 23:16:10,707 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:10,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:16:10,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:16:10,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:16:10,708 INFO L87 Difference]: Start difference. First operand 352 states and 529 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:16:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:11,163 INFO L93 Difference]: Finished difference Result 667 states and 1014 transitions. [2021-11-12 23:16:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:16:11,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 23:16:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:11,169 INFO L225 Difference]: With dead ends: 667 [2021-11-12 23:16:11,169 INFO L226 Difference]: Without dead ends: 352 [2021-11-12 23:16:11,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:16:11,171 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 6 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 433.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 445.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:11,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 630 Invalid, 105 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 101 Unchecked, 445.07ms Time] [2021-11-12 23:16:11,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-12 23:16:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-12 23:16:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.5042735042735043) internal successors, (528), 351 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:16:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 528 transitions. [2021-11-12 23:16:11,192 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 528 transitions. Word has length 60 [2021-11-12 23:16:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:11,192 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 528 transitions. [2021-11-12 23:16:11,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:16:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 528 transitions. [2021-11-12 23:16:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:16:11,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:11,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:11,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:11,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:11,410 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:11,411 INFO L85 PathProgramCache]: Analyzing trace with hash 844599537, now seen corresponding path program 1 times [2021-11-12 23:16:11,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:11,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787170100] [2021-11-12 23:16:11,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:11,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:11,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:11,414 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:11,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:16:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:11,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:16:11,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:11,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:11,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:12,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:12,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:12,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:12,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:12,414 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:16:12,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 23:16:13,595 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:16:13,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 23:16:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:13,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:13,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:13,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787170100] [2021-11-12 23:16:13,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787170100] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:13,974 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:13,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:16:13,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853525564] [2021-11-12 23:16:13,975 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:13,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:16:13,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:13,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:16:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:16:13,977 INFO L87 Difference]: Start difference. First operand 352 states and 528 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:16:16,010 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:18,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:19,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:24,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:30,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:34,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:35,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:37,199 INFO L93 Difference]: Finished difference Result 750 states and 1131 transitions. [2021-11-12 23:16:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:16:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 23:16:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:37,204 INFO L225 Difference]: With dead ends: 750 [2021-11-12 23:16:37,205 INFO L226 Difference]: Without dead ends: 435 [2021-11-12 23:16:37,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:16:37,206 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 30 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 9 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22606.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23111.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:37,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 642 Invalid, 274 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [9 Valid, 261 Invalid, 4 Unknown, 0 Unchecked, 23111.85ms Time] [2021-11-12 23:16:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-12 23:16:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 395. [2021-11-12 23:16:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.5050761421319796) internal successors, (593), 394 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:16:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 593 transitions. [2021-11-12 23:16:37,231 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 593 transitions. Word has length 60 [2021-11-12 23:16:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:37,231 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 593 transitions. [2021-11-12 23:16:37,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:16:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 593 transitions. [2021-11-12 23:16:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:16:37,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:37,233 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:37,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 23:16:37,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:37,448 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:37,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1142207287, now seen corresponding path program 1 times [2021-11-12 23:16:37,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:37,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590319243] [2021-11-12 23:16:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:37,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:37,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:37,450 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:37,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:16:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:37,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:16:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:37,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:37,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:37,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:37,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:38,328 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:16:38,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:16:41,551 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:16:41,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:16:48,704 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:16:48,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:16:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:48,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:16:49,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:49,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590319243] [2021-11-12 23:16:49,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590319243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:49,155 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:49,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:16:49,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683107056] [2021-11-12 23:16:49,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:49,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:16:49,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:49,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:16:49,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:16:49,157 INFO L87 Difference]: Start difference. First operand 395 states and 593 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:16:51,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:00,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:00,331 INFO L93 Difference]: Finished difference Result 775 states and 1170 transitions. [2021-11-12 23:17:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:17:00,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 23:17:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:00,337 INFO L225 Difference]: With dead ends: 775 [2021-11-12 23:17:00,337 INFO L226 Difference]: Without dead ends: 417 [2021-11-12 23:17:00,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-12 23:17:00,339 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 37 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6816.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.17ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 7013.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:00,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 649 Invalid, 334 Unknown, 0 Unchecked, 2.17ms Time], IncrementalHoareTripleChecker [35 Valid, 118 Invalid, 1 Unknown, 180 Unchecked, 7013.30ms Time] [2021-11-12 23:17:00,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-12 23:17:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 395. [2021-11-12 23:17:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.4923857868020305) internal successors, (588), 394 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 588 transitions. [2021-11-12 23:17:00,366 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 588 transitions. Word has length 60 [2021-11-12 23:17:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:00,366 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 588 transitions. [2021-11-12 23:17:00,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 588 transitions. [2021-11-12 23:17:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:17:00,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:00,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:00,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:00,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:00,588 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:00,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:00,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1334074737, now seen corresponding path program 1 times [2021-11-12 23:17:00,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:00,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289237879] [2021-11-12 23:17:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:00,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:00,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:00,592 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:00,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:17:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:01,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:01,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:01,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:01,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:01,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:01,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:01,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:01,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:01,749 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:17:01,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 23:17:02,593 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:17:02,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 23:17:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:02,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:03,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:03,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289237879] [2021-11-12 23:17:03,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289237879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:03,048 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:03,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:17:03,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438328550] [2021-11-12 23:17:03,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:03,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:17:03,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:03,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:17:03,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:17:03,051 INFO L87 Difference]: Start difference. First operand 395 states and 588 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:05,084 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:06,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:21,443 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:23,534 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:25,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:28,001 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:29,731 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:33,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:33,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:33,993 INFO L93 Difference]: Finished difference Result 1022 states and 1540 transitions. [2021-11-12 23:17:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:17:33,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:17:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:34,000 INFO L225 Difference]: With dead ends: 1022 [2021-11-12 23:17:34,000 INFO L226 Difference]: Without dead ends: 664 [2021-11-12 23:17:34,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:17:34,002 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 211 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30010.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30789.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:34,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 964 Invalid, 545 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [56 Valid, 488 Invalid, 1 Unknown, 0 Unchecked, 30789.95ms Time] [2021-11-12 23:17:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-12 23:17:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 426. [2021-11-12 23:17:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.48) internal successors, (629), 425 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 629 transitions. [2021-11-12 23:17:34,031 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 629 transitions. Word has length 73 [2021-11-12 23:17:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:34,031 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 629 transitions. [2021-11-12 23:17:34,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 629 transitions. [2021-11-12 23:17:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:17:34,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:34,034 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:34,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:34,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:34,250 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:34,251 INFO L85 PathProgramCache]: Analyzing trace with hash 472228220, now seen corresponding path program 1 times [2021-11-12 23:17:34,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:34,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978179833] [2021-11-12 23:17:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:34,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:34,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:34,253 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:34,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:17:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:35,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:35,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:35,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:35,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:35,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:35,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:35,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:35,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:35,762 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:17:35,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 23:17:36,195 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:17:36,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 23:17:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:36,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:36,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:36,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978179833] [2021-11-12 23:17:36,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978179833] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:36,682 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:36,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:17:36,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134848047] [2021-11-12 23:17:36,682 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:36,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:17:36,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:17:36,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:17:36,684 INFO L87 Difference]: Start difference. First operand 426 states and 629 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:38,715 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:40,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:41,980 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:50,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:52,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:56,184 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:57,965 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 [] [2021-11-12 23:18:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:02,418 INFO L93 Difference]: Finished difference Result 1049 states and 1573 transitions. [2021-11-12 23:18:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:18:02,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-12 23:18:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:02,424 INFO L225 Difference]: With dead ends: 1049 [2021-11-12 23:18:02,424 INFO L226 Difference]: Without dead ends: 660 [2021-11-12 23:18:02,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:18:02,426 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 192 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 70 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24846.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25592.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:02,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 595 Invalid, 552 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [70 Valid, 480 Invalid, 2 Unknown, 0 Unchecked, 25592.69ms Time] [2021-11-12 23:18:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-11-12 23:18:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 426. [2021-11-12 23:18:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.4611764705882353) internal successors, (621), 425 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 621 transitions. [2021-11-12 23:18:02,449 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 621 transitions. Word has length 74 [2021-11-12 23:18:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:02,450 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 621 transitions. [2021-11-12 23:18:02,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 621 transitions. [2021-11-12 23:18:02,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 23:18:02,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:02,452 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:02,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:02,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:02,682 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:02,682 INFO L85 PathProgramCache]: Analyzing trace with hash 185457813, now seen corresponding path program 1 times [2021-11-12 23:18:02,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:02,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182797382] [2021-11-12 23:18:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:02,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:02,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:02,684 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:02,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:18:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:03,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:18:03,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:03,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:03,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:03,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:03,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:03,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:03,740 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:18:03,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 23:18:04,335 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:18:04,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 23:18:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:04,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:04,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:04,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182797382] [2021-11-12 23:18:04,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182797382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:04,733 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:18:04,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:18:04,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728701252] [2021-11-12 23:18:04,733 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:04,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:18:04,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:04,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:18:04,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:18:04,735 INFO L87 Difference]: Start difference. First operand 426 states and 621 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:06,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:13,139 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:18,256 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:21,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:24,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:26,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:26,728 INFO L93 Difference]: Finished difference Result 991 states and 1473 transitions. [2021-11-12 23:18:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:18:26,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-12 23:18:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:26,732 INFO L225 Difference]: With dead ends: 991 [2021-11-12 23:18:26,732 INFO L226 Difference]: Without dead ends: 602 [2021-11-12 23:18:26,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:18:26,734 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 166 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21288.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.31ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21855.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:26,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 466 Invalid, 384 Unknown, 0 Unchecked, 3.31ms Time], IncrementalHoareTripleChecker [51 Valid, 332 Invalid, 1 Unknown, 0 Unchecked, 21855.70ms Time] [2021-11-12 23:18:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-12 23:18:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 428. [2021-11-12 23:18:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.449648711943794) internal successors, (619), 427 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 619 transitions. [2021-11-12 23:18:26,758 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 619 transitions. Word has length 76 [2021-11-12 23:18:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:26,759 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 619 transitions. [2021-11-12 23:18:26,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 619 transitions. [2021-11-12 23:18:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 23:18:26,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:26,761 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:26,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:26,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:26,981 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1394397078, now seen corresponding path program 1 times [2021-11-12 23:18:26,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:26,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917157712] [2021-11-12 23:18:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:26,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:26,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:26,984 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:26,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:18:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:27,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:18:27,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:27,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:27,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:27,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:27,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:27,759 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:18:27,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:18:27,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:27,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:27,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:28,186 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:18:28,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:18:30,699 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:18:30,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:18:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:18:30,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:18:31,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:31,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917157712] [2021-11-12 23:18:31,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917157712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:31,116 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:18:31,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:18:31,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737205464] [2021-11-12 23:18:31,116 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:31,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:18:31,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:31,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:18:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:18:31,118 INFO L87 Difference]: Start difference. First operand 428 states and 619 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:33,149 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:35,652 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:40,034 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:45,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:47,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:49,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:50,609 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:55,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:56,404 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:58,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:59,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:03,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:07,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:09,714 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:12,849 INFO L93 Difference]: Finished difference Result 1274 states and 1882 transitions. [2021-11-12 23:19:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:19:12,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 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 82 [2021-11-12 23:19:12,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:12,854 INFO L225 Difference]: With dead ends: 1274 [2021-11-12 23:19:12,854 INFO L226 Difference]: Without dead ends: 883 [2021-11-12 23:19:12,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:19:12,856 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 325 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 83 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40649.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.69ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41570.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:12,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 702 Invalid, 619 Unknown, 0 Unchecked, 4.69ms Time], IncrementalHoareTripleChecker [83 Valid, 533 Invalid, 3 Unknown, 0 Unchecked, 41570.24ms Time] [2021-11-12 23:19:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-11-12 23:19:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 534. [2021-11-12 23:19:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.4765478424015008) internal successors, (787), 533 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 787 transitions. [2021-11-12 23:19:12,891 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 787 transitions. Word has length 82 [2021-11-12 23:19:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:12,892 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 787 transitions. [2021-11-12 23:19:12,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 787 transitions. [2021-11-12 23:19:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:19:12,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:12,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:12,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:13,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:13,110 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:13,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:13,110 INFO L85 PathProgramCache]: Analyzing trace with hash 268852943, now seen corresponding path program 1 times [2021-11-12 23:19:13,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:13,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58900819] [2021-11-12 23:19:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:13,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:13,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:13,112 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:13,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:19:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:13,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:19:13,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:13,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:13,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:13,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:13,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:13,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:13,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:13,686 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:19:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:19:13,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:13,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:13,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:14,088 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:19:14,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:19:16,430 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:19:16,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:19:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:19:16,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:19:16,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:16,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58900819] [2021-11-12 23:19:16,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58900819] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:19:16,884 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:19:16,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:19:16,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450933689] [2021-11-12 23:19:16,884 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:16,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:19:16,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:19:16,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:19:16,885 INFO L87 Difference]: Start difference. First operand 534 states and 787 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:18,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:20,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:27,829 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:33,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:38,476 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:39,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:41,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:43,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:47,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:51,482 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:53,660 INFO L93 Difference]: Finished difference Result 1487 states and 2240 transitions. [2021-11-12 23:19:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:19:53,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-12 23:19:53,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:53,667 INFO L225 Difference]: With dead ends: 1487 [2021-11-12 23:19:53,667 INFO L226 Difference]: Without dead ends: 990 [2021-11-12 23:19:53,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:19:53,669 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 311 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 77 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35764.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.68ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36617.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:53,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 728 Invalid, 606 Unknown, 0 Unchecked, 4.68ms Time], IncrementalHoareTripleChecker [77 Valid, 525 Invalid, 4 Unknown, 0 Unchecked, 36617.68ms Time] [2021-11-12 23:19:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-11-12 23:19:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 655. [2021-11-12 23:19:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.525993883792049) internal successors, (998), 654 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 998 transitions. [2021-11-12 23:19:53,704 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 998 transitions. Word has length 83 [2021-11-12 23:19:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:53,705 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 998 transitions. [2021-11-12 23:19:53,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 998 transitions. [2021-11-12 23:19:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 23:19:53,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:53,707 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:53,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:53,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:53,939 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash -149064354, now seen corresponding path program 1 times [2021-11-12 23:19:53,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:53,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045164542] [2021-11-12 23:19:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:53,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:53,941 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:53,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:19:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:54,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:19:54,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:54,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:54,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:54,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:54,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:54,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:54,664 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:19:54,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:19:54,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:54,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:54,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:55,154 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:19:55,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:19:56,847 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:19:56,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:19:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:19:56,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:19:57,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:57,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045164542] [2021-11-12 23:19:57,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045164542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:19:57,369 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:19:57,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:19:57,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305622692] [2021-11-12 23:19:57,369 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:57,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:19:57,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:19:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:19:57,371 INFO L87 Difference]: Start difference. First operand 655 states and 998 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:19:59,399 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:09,707 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:14,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:17,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:19,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:22,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:28,085 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:29,646 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:31,433 INFO L93 Difference]: Finished difference Result 1689 states and 2578 transitions. [2021-11-12 23:20:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:20:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-12 23:20:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:31,439 INFO L225 Difference]: With dead ends: 1689 [2021-11-12 23:20:31,439 INFO L226 Difference]: Without dead ends: 1071 [2021-11-12 23:20:31,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:20:31,440 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 243 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32996.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.41ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33891.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:31,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 651 Invalid, 580 Unknown, 0 Unchecked, 4.41ms Time], IncrementalHoareTripleChecker [69 Valid, 509 Invalid, 2 Unknown, 0 Unchecked, 33891.15ms Time] [2021-11-12 23:20:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-11-12 23:20:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 714. [2021-11-12 23:20:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 1.5189340813464236) internal successors, (1083), 713 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1083 transitions. [2021-11-12 23:20:31,472 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1083 transitions. Word has length 110 [2021-11-12 23:20:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:31,473 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 1083 transitions. [2021-11-12 23:20:31,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1083 transitions. [2021-11-12 23:20:31,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:20:31,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:31,476 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:31,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:31,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:31,692 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:31,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:31,693 INFO L85 PathProgramCache]: Analyzing trace with hash -13167812, now seen corresponding path program 1 times [2021-11-12 23:20:31,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:31,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76755707] [2021-11-12 23:20:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:31,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:31,694 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:31,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:20:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:32,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:20:32,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:32,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:32,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:32,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:32,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:32,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:32,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:32,287 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:20:32,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:20:32,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:32,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:32,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:32,612 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:20:32,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:20:34,034 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:20:34,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:20:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:20:34,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:20:34,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:34,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76755707] [2021-11-12 23:20:34,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76755707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:34,516 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:34,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:20:34,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924855659] [2021-11-12 23:20:34,516 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:34,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:20:34,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:34,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:20:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:34,517 INFO L87 Difference]: Start difference. First operand 714 states and 1083 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:36,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:48,026 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:50,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:52,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:01,273 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:03,397 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:05,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:06,616 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:08,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:09,686 INFO L93 Difference]: Finished difference Result 1724 states and 2615 transitions. [2021-11-12 23:21:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:21:09,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-12 23:21:09,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:09,693 INFO L225 Difference]: With dead ends: 1724 [2021-11-12 23:21:09,693 INFO L226 Difference]: Without dead ends: 1047 [2021-11-12 23:21:09,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:21:09,695 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 240 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 73 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34160.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.27ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35025.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:09,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 861 Invalid, 716 Unknown, 0 Unchecked, 4.27ms Time], IncrementalHoareTripleChecker [73 Valid, 641 Invalid, 2 Unknown, 0 Unchecked, 35025.95ms Time] [2021-11-12 23:21:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-11-12 23:21:09,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 714. [2021-11-12 23:21:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 1.5105189340813465) internal successors, (1077), 713 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:09,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1077 transitions. [2021-11-12 23:21:09,728 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1077 transitions. Word has length 111 [2021-11-12 23:21:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:09,729 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 1077 transitions. [2021-11-12 23:21:09,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1077 transitions. [2021-11-12 23:21:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:21:09,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:09,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:09,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:09,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:09,934 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:09,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1022235621, now seen corresponding path program 1 times [2021-11-12 23:21:09,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:09,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12307478] [2021-11-12 23:21:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:09,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:09,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:09,936 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:09,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:21:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:10,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:21:10,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:10,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:10,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:10,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:10,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:10,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:10,552 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:21:10,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:21:10,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:10,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:10,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:10,987 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:21:10,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:21:12,496 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:21:12,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:21:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:21:12,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:21:12,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:12,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12307478] [2021-11-12 23:21:12,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12307478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:12,955 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:12,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:21:12,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857886111] [2021-11-12 23:21:12,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:12,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:21:12,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:21:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:21:12,956 INFO L87 Difference]: Start difference. First operand 714 states and 1077 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2021-11-12 23:21:14,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:24,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:27,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:31,603 INFO L93 Difference]: Finished difference Result 1791 states and 2721 transitions. [2021-11-12 23:21:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:21:31,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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 111 [2021-11-12 23:21:31,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:31,610 INFO L225 Difference]: With dead ends: 1791 [2021-11-12 23:21:31,611 INFO L226 Difference]: Without dead ends: 1114 [2021-11-12 23:21:31,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:21:31,612 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 264 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17917.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.31ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18508.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:31,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 572 Invalid, 474 Unknown, 0 Unchecked, 3.31ms Time], IncrementalHoareTripleChecker [53 Valid, 420 Invalid, 1 Unknown, 0 Unchecked, 18508.82ms Time] [2021-11-12 23:21:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-11-12 23:21:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 813. [2021-11-12 23:21:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.5123152709359606) internal successors, (1228), 812 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1228 transitions. [2021-11-12 23:21:31,652 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1228 transitions. Word has length 111 [2021-11-12 23:21:31,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:31,653 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1228 transitions. [2021-11-12 23:21:31,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 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) [2021-11-12 23:21:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1228 transitions. [2021-11-12 23:21:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:21:31,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:31,656 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:31,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:31,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:31,870 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:31,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1747979246, now seen corresponding path program 1 times [2021-11-12 23:21:31,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:31,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828110319] [2021-11-12 23:21:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:31,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:31,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:31,873 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:31,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:21:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:32,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:21:32,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:21:32,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:32,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828110319] [2021-11-12 23:21:32,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828110319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:32,742 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:32,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:21:32,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870069830] [2021-11-12 23:21:32,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:32,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:32,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:32,743 INFO L87 Difference]: Start difference. First operand 813 states and 1228 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:33,253 INFO L93 Difference]: Finished difference Result 3062 states and 4673 transitions. [2021-11-12 23:21:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:33,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 [2021-11-12 23:21:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:33,264 INFO L225 Difference]: With dead ends: 3062 [2021-11-12 23:21:33,264 INFO L226 Difference]: Without dead ends: 2286 [2021-11-12 23:21:33,266 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 [2021-11-12 23:21:33,266 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 434 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 407.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.46ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 438.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:33,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 582 Invalid, 93 Unknown, 0 Unchecked, 1.46ms Time], IncrementalHoareTripleChecker [33 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 438.88ms Time] [2021-11-12 23:21:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-11-12 23:21:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2276. [2021-11-12 23:21:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 1.5169230769230768) internal successors, (3451), 2275 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:33,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 3451 transitions. [2021-11-12 23:21:33,377 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 3451 transitions. Word has length 117 [2021-11-12 23:21:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:33,377 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 3451 transitions. [2021-11-12 23:21:33,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 3451 transitions. [2021-11-12 23:21:33,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:21:33,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:33,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:33,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:33,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:33,602 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash -97387920, now seen corresponding path program 1 times [2021-11-12 23:21:33,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:33,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240616275] [2021-11-12 23:21:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:33,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:33,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:33,604 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:33,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:21:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:34,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:21:34,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:34,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:34,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:34,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:34,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:34,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:34,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:34,218 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:21:34,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:21:34,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:34,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:34,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:34,640 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:21:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:21:36,709 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:21:36,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:21:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:21:36,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:21:37,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:37,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240616275] [2021-11-12 23:21:37,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240616275] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:37,276 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:37,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:21:37,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763772345] [2021-11-12 23:21:37,277 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:37,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:21:37,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:37,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:21:37,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:21:37,278 INFO L87 Difference]: Start difference. First operand 2276 states and 3451 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:39,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:41,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:43,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:50,020 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:59,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:02,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:07,861 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:08,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:13,981 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:15,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:16,689 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:17,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:18,755 INFO L93 Difference]: Finished difference Result 5703 states and 8584 transitions. [2021-11-12 23:22:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:22:18,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-12 23:22:18,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:18,770 INFO L225 Difference]: With dead ends: 5703 [2021-11-12 23:22:18,770 INFO L226 Difference]: Without dead ends: 3464 [2021-11-12 23:22:18,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:22:18,772 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 230 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 73 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40365.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41273.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:18,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 751 Invalid, 697 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [73 Valid, 619 Invalid, 5 Unknown, 0 Unchecked, 41273.47ms Time] [2021-11-12 23:22:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-12 23:22:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2495. [2021-11-12 23:22:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2494 states have (on average 1.51242983159583) internal successors, (3772), 2494 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3772 transitions. [2021-11-12 23:22:18,915 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3772 transitions. Word has length 117 [2021-11-12 23:22:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:18,916 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 3772 transitions. [2021-11-12 23:22:18,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3772 transitions. [2021-11-12 23:22:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 23:22:18,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:18,922 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:18,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:19,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:19,138 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:19,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1633742857, now seen corresponding path program 1 times [2021-11-12 23:22:19,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:19,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076419134] [2021-11-12 23:22:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:19,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:19,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:19,140 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:19,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:22:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:19,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:22:19,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:19,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:19,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:19,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:19,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:19,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:19,805 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:22:19,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:22:19,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:19,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:19,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:20,137 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:22:20,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:22:22,075 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:22:22,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:22:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:22:22,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:22:22,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:22,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076419134] [2021-11-12 23:22:22,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076419134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:22,699 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:22,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:22:22,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634027772] [2021-11-12 23:22:22,699 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:22,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:22:22,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:22:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:22:22,700 INFO L87 Difference]: Start difference. First operand 2495 states and 3772 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:24,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:38,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:40,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:41,155 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:42,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:47,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:49,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:55,662 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 [] [2021-11-12 23:22:58,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:58,358 INFO L93 Difference]: Finished difference Result 5888 states and 8839 transitions. [2021-11-12 23:22:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:22:58,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-12 23:22:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:58,376 INFO L225 Difference]: With dead ends: 5888 [2021-11-12 23:22:58,376 INFO L226 Difference]: Without dead ends: 3430 [2021-11-12 23:22:58,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:22:58,378 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 275 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 78 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34519.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.17ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35431.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:58,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 727 Invalid, 688 Unknown, 0 Unchecked, 4.17ms Time], IncrementalHoareTripleChecker [78 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 35431.11ms Time] [2021-11-12 23:22:58,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-11-12 23:22:58,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 2495. [2021-11-12 23:22:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2494 states have (on average 1.5052125100240576) internal successors, (3754), 2494 states have internal predecessors, (3754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3754 transitions. [2021-11-12 23:22:58,492 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3754 transitions. Word has length 118 [2021-11-12 23:22:58,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:58,493 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 3754 transitions. [2021-11-12 23:22:58,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:22:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3754 transitions. [2021-11-12 23:22:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:22:58,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:58,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:58,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-12 23:22:58,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:58,716 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash 225985155, now seen corresponding path program 1 times [2021-11-12 23:22:58,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:58,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523657390] [2021-11-12 23:22:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:58,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:58,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:58,718 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:58,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:22:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:22:59,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:59,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:59,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:59,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:59,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:59,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:59,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:59,401 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:22:59,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:22:59,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:59,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:59,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:59,759 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:22:59,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:23:02,085 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:23:02,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:23:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:23:02,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:23:03,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:03,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523657390] [2021-11-12 23:23:03,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523657390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:03,412 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:03,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 23:23:03,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009232772] [2021-11-12 23:23:03,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:03,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:23:03,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:23:03,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:23:03,414 INFO L87 Difference]: Start difference. First operand 2495 states and 3754 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:05,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:07,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:19,077 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:22,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:25,229 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:26,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:26,511 INFO L93 Difference]: Finished difference Result 5400 states and 8111 transitions. [2021-11-12 23:23:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:23:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 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 125 [2021-11-12 23:23:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:26,527 INFO L225 Difference]: With dead ends: 5400 [2021-11-12 23:23:26,527 INFO L226 Difference]: Without dead ends: 2942 [2021-11-12 23:23:26,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:23:26,530 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 57 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22380.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.18ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22936.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:26,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 610 Invalid, 334 Unknown, 0 Unchecked, 2.18ms Time], IncrementalHoareTripleChecker [6 Valid, 326 Invalid, 2 Unknown, 0 Unchecked, 22936.91ms Time] [2021-11-12 23:23:26,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-11-12 23:23:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2746. [2021-11-12 23:23:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 1.5005464480874318) internal successors, (4119), 2745 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 4119 transitions. [2021-11-12 23:23:26,624 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 4119 transitions. Word has length 125 [2021-11-12 23:23:26,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:26,624 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 4119 transitions. [2021-11-12 23:23:26,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:26,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 4119 transitions. [2021-11-12 23:23:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:23:26,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:26,629 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:26,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:26,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:26,856 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1792743105, now seen corresponding path program 1 times [2021-11-12 23:23:26,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:26,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245502604] [2021-11-12 23:23:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:26,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:26,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:26,859 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:26,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:23:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:27,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:23:27,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:27,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:27,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:27,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:27,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:27,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:27,503 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 23:23:27,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-12 23:23:27,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:27,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:27,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:27,876 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:23:27,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-12 23:23:29,083 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:23:29,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-12 23:23:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:23:29,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:23:30,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:30,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245502604] [2021-11-12 23:23:30,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245502604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:30,002 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:30,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 23:23:30,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997392783] [2021-11-12 23:23:30,003 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:30,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:23:30,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:23:30,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:23:30,004 INFO L87 Difference]: Start difference. First operand 2746 states and 4119 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:32,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:34,042 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:42,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:43,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:47,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:49,865 INFO L93 Difference]: Finished difference Result 5672 states and 8497 transitions. [2021-11-12 23:23:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:23:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-12 23:23:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:49,882 INFO L225 Difference]: With dead ends: 5672 [2021-11-12 23:23:49,882 INFO L226 Difference]: Without dead ends: 2963 [2021-11-12 23:23:49,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:23:49,885 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 27 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19195.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19692.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:49,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 698 Invalid, 268 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 19692.99ms Time] [2021-11-12 23:23:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2021-11-12 23:23:49,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2887. [2021-11-12 23:23:49,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 1.4948024948024947) internal successors, (4314), 2886 states have internal predecessors, (4314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4314 transitions. [2021-11-12 23:23:49,985 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4314 transitions. Word has length 125 [2021-11-12 23:23:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:49,986 INFO L470 AbstractCegarLoop]: Abstraction has 2887 states and 4314 transitions. [2021-11-12 23:23:49,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:49,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4314 transitions. [2021-11-12 23:23:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 23:23:49,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:49,989 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:23:50,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:50,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:50,190 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2082880879, now seen corresponding path program 1 times [2021-11-12 23:23:50,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:50,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588817196] [2021-11-12 23:23:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:50,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:50,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:50,197 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:50,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:23:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:50,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:23:50,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:50,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:50,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:50,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:50,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:50,854 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:23:50,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:23:50,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:50,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:50,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:51,239 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:23:51,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:23:52,710 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:23:52,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:23:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:23:52,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:23:53,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:53,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588817196] [2021-11-12 23:23:53,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588817196] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:53,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:53,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:23:53,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147373722] [2021-11-12 23:23:53,400 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:53,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:23:53,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:53,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:23:53,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:23:53,401 INFO L87 Difference]: Start difference. First operand 2887 states and 4314 transitions. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:23:55,433 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:57,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:59,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:12,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:17,292 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:25,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:32,071 INFO L93 Difference]: Finished difference Result 6622 states and 9845 transitions. [2021-11-12 23:24:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:32,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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 135 [2021-11-12 23:24:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:32,083 INFO L225 Difference]: With dead ends: 6622 [2021-11-12 23:24:32,083 INFO L226 Difference]: Without dead ends: 3772 [2021-11-12 23:24:32,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:32,087 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 224 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 69 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37563.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.58ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38420.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:32,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 670 Invalid, 595 Unknown, 0 Unchecked, 3.58ms Time], IncrementalHoareTripleChecker [69 Valid, 522 Invalid, 4 Unknown, 0 Unchecked, 38420.00ms Time] [2021-11-12 23:24:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-11-12 23:24:32,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3052. [2021-11-12 23:24:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 1.4804981973123565) internal successors, (4517), 3051 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4517 transitions. [2021-11-12 23:24:32,215 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4517 transitions. Word has length 135 [2021-11-12 23:24:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:32,215 INFO L470 AbstractCegarLoop]: Abstraction has 3052 states and 4517 transitions. [2021-11-12 23:24:32,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4517 transitions. [2021-11-12 23:24:32,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:24:32,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:32,219 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:24:32,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:32,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:32,420 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash 384319985, now seen corresponding path program 1 times [2021-11-12 23:24:32,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:32,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001278442] [2021-11-12 23:24:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:32,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:32,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:32,422 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:32,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:24:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:32,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:32,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:33,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:33,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:33,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:33,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:33,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:24:33,157 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:24:33,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:24:33,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:24:33,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:24:33,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:24:33,593 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:24:33,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:24:35,133 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:24:35,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:24:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:24:35,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:24:35,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:35,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001278442] [2021-11-12 23:24:35,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001278442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:35,829 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:35,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:24:35,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775132694] [2021-11-12 23:24:35,829 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:35,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:35,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:35,831 INFO L87 Difference]: Start difference. First operand 3052 states and 4517 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2021-11-12 23:24:37,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:48,404 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:50,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:59,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:01,297 INFO L93 Difference]: Finished difference Result 6667 states and 9822 transitions. [2021-11-12 23:25:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:01,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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 136 [2021-11-12 23:25:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:01,305 INFO L225 Difference]: With dead ends: 6667 [2021-11-12 23:25:01,305 INFO L226 Difference]: Without dead ends: 3652 [2021-11-12 23:25:01,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:25:01,308 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 310 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24488.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.63ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25212.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:01,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 622 Invalid, 594 Unknown, 0 Unchecked, 3.63ms Time], IncrementalHoareTripleChecker [77 Valid, 516 Invalid, 1 Unknown, 0 Unchecked, 25212.73ms Time] [2021-11-12 23:25:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3652 states. [2021-11-12 23:25:01,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3652 to 3052. [2021-11-12 23:25:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 1.4654211733857752) internal successors, (4471), 3051 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4471 transitions. [2021-11-12 23:25:01,429 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4471 transitions. Word has length 136 [2021-11-12 23:25:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:01,430 INFO L470 AbstractCegarLoop]: Abstraction has 3052 states and 4471 transitions. [2021-11-12 23:25:01,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2021-11-12 23:25:01,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4471 transitions. [2021-11-12 23:25:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:25:01,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:01,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:01,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:01,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:01,634 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:01,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1270047632, now seen corresponding path program 1 times [2021-11-12 23:25:01,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:01,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789367076] [2021-11-12 23:25:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:01,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:01,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:01,637 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:01,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:25:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:02,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:25:02,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:02,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:02,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:02,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:02,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:02,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:02,304 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:25:02,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:25:02,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:02,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:02,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:02,684 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:25:02,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:25:03,921 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:25:03,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:25:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:25:04,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:25:04,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:04,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789367076] [2021-11-12 23:25:04,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789367076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:04,593 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:04,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:25:04,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978027905] [2021-11-12 23:25:04,593 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:04,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:25:04,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:04,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:25:04,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:25:04,594 INFO L87 Difference]: Start difference. First operand 3052 states and 4471 transitions. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:06,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:20,386 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:21,838 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:23,534 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:24,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:30,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:32,292 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:36,452 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:39,451 INFO L93 Difference]: Finished difference Result 6667 states and 9730 transitions. [2021-11-12 23:25:39,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:25:39,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 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 147 [2021-11-12 23:25:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:39,457 INFO L225 Difference]: With dead ends: 6667 [2021-11-12 23:25:39,457 INFO L226 Difference]: Without dead ends: 3652 [2021-11-12 23:25:39,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:25:39,459 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 216 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33692.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.82ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34592.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:39,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 761 Invalid, 690 Unknown, 0 Unchecked, 3.82ms Time], IncrementalHoareTripleChecker [68 Valid, 621 Invalid, 1 Unknown, 0 Unchecked, 34592.31ms Time] [2021-11-12 23:25:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3652 states. [2021-11-12 23:25:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3652 to 3052. [2021-11-12 23:25:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 1.448377581120944) internal successors, (4419), 3051 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4419 transitions. [2021-11-12 23:25:39,571 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4419 transitions. Word has length 147 [2021-11-12 23:25:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:39,572 INFO L470 AbstractCegarLoop]: Abstraction has 3052 states and 4419 transitions. [2021-11-12 23:25:39,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4419 transitions. [2021-11-12 23:25:39,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:25:39,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:39,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:39,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:39,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:39,804 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1635625650, now seen corresponding path program 1 times [2021-11-12 23:25:39,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:39,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434955720] [2021-11-12 23:25:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:39,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:39,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:39,806 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:39,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:25:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:40,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:25:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:40,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:40,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:40,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:40,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:40,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:40,896 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:25:40,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 23:25:42,212 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:25:42,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 23:25:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:25:42,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:25:42,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:42,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434955720] [2021-11-12 23:25:42,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434955720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:42,809 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:42,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:25:42,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473482962] [2021-11-12 23:25:42,809 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:42,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:25:42,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:25:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:25:42,811 INFO L87 Difference]: Start difference. First operand 3052 states and 4419 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 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) [2021-11-12 23:25:44,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:52,395 INFO L93 Difference]: Finished difference Result 6302 states and 9127 transitions. [2021-11-12 23:25:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:25:52,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 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 147 [2021-11-12 23:25:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:52,402 INFO L225 Difference]: With dead ends: 6302 [2021-11-12 23:25:52,402 INFO L226 Difference]: Without dead ends: 3287 [2021-11-12 23:25:52,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:25:52,406 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 58 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9108.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9403.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:52,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 587 Invalid, 175 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [6 Valid, 168 Invalid, 1 Unknown, 0 Unchecked, 9403.52ms Time] [2021-11-12 23:25:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2021-11-12 23:25:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 3205. [2021-11-12 23:25:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3205 states, 3204 states have (on average 1.445692883895131) internal successors, (4632), 3204 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 4632 transitions. [2021-11-12 23:25:52,565 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 4632 transitions. Word has length 147 [2021-11-12 23:25:52,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:52,566 INFO L470 AbstractCegarLoop]: Abstraction has 3205 states and 4632 transitions. [2021-11-12 23:25:52,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 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) [2021-11-12 23:25:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 4632 transitions. [2021-11-12 23:25:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:25:52,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:52,572 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:52,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-12 23:25:52,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:52,788 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:52,788 INFO L85 PathProgramCache]: Analyzing trace with hash -458841618, now seen corresponding path program 1 times [2021-11-12 23:25:52,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:52,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107152264] [2021-11-12 23:25:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:52,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:52,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:52,790 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:52,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3df7e4a-db6b-453b-83a9-e3b803e452d8/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:25:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:25:53,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:53,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:53,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:53,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:53,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:25:53,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:53,525 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:25:53,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:25:53,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:53,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:53,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:25:53,908 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:25:53,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:25:55,799 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:25:55,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:25:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:25:56,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:25:56,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:56,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107152264] [2021-11-12 23:25:56,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107152264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:56,556 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:56,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:25:56,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123350844] [2021-11-12 23:25:56,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:56,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:25:56,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:56,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:25:56,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:25:56,558 INFO L87 Difference]: Start difference. First operand 3205 states and 4632 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:58,587 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []