./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/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 f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:31:27,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:31:27,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:31:27,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:31:27,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:31:27,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:31:27,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:31:27,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:31:27,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:31:27,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:31:27,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:31:27,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:31:27,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:31:27,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:31:27,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:31:27,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:31:27,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:31:27,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:31:27,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:31:27,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:31:27,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:31:27,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:31:27,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:31:27,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:31:27,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:31:27,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:31:27,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:31:27,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:31:27,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:31:27,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:31:27,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:31:27,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:31:27,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:31:27,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:31:27,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:31:27,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:31:27,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:31:27,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:31:27,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:31:27,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:31:27,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:31:27,174 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:31:27,226 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:31:27,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:31:27,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:31:27,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:31:27,228 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:31:27,228 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:31:27,234 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:31:27,235 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:31:27,235 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:31:27,235 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:31:27,236 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:31:27,236 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:31:27,236 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:31:27,237 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:31:27,237 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:31:27,237 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:31:27,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:31:27,238 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:31:27,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:31:27,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:31:27,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:31:27,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:31:27,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:31:27,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:31:27,240 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:31:27,240 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:31:27,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:31:27,240 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:31:27,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:31:27,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:31:27,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:31:27,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:27,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:31:27,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:31:27,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:31:27,243 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:31:27,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:31:27,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:31:27,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:31:27,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:31:27,244 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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2021-11-13 01:31:27,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:31:27,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:31:27,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:31:27,537 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:31:27,538 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:31:27,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-13 01:31:27,636 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/data/f6df36191/426792da4b124a2d9bdcf34b6fae67f2/FLAG90dfc6061 [2021-11-13 01:31:28,217 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:31:28,218 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-13 01:31:28,243 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/data/f6df36191/426792da4b124a2d9bdcf34b6fae67f2/FLAG90dfc6061 [2021-11-13 01:31:28,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/data/f6df36191/426792da4b124a2d9bdcf34b6fae67f2 [2021-11-13 01:31:28,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:31:28,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:31:28,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:28,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:31:28,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:31:28,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:28" (1/1) ... [2021-11-13 01:31:28,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f77ec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:28, skipping insertion in model container [2021-11-13 01:31:28,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:28" (1/1) ... [2021-11-13 01:31:28,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:31:28,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:31:29,155 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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-13 01:31:29,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:29,179 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 01:31:29,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b01d410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:29, skipping insertion in model container [2021-11-13 01:31:29,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:29,181 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:31:29,183 INFO L158 Benchmark]: Toolchain (without parser) took 710.63ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 60.5MB in the beginning and 82.2MB in the end (delta: -21.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 01:31:29,183 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 96.5MB. Free memory is still 49.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:31:29,184 INFO L158 Benchmark]: CACSL2BoogieTranslator took 703.05ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 60.3MB in the beginning and 82.2MB in the end (delta: -22.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 01:31:29,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 96.5MB. Free memory is still 49.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 703.05ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 60.3MB in the beginning and 82.2MB in the end (delta: -22.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/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 f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:31:31,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:31:31,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:31:31,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:31:31,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:31:31,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:31:31,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:31:31,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:31:31,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:31:31,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:31:31,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:31:31,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:31:31,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:31:31,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:31:31,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:31:31,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:31:31,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:31:31,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:31:31,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:31:31,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:31:31,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:31:31,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:31:31,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:31:31,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:31:31,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:31:31,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:31:31,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:31:31,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:31:31,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:31:31,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:31:31,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:31:31,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:31:31,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:31:31,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:31:31,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:31:31,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:31:31,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:31:31,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:31:31,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:31:31,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:31:31,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:31:31,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:31:31,675 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:31:31,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:31:31,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:31:31,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:31:31,677 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:31:31,677 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:31:31,678 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:31:31,678 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:31:31,678 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:31:31,678 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:31:31,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:31:31,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:31:31,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:31:31,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:31:31,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:31:31,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:31:31,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:31:31,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:31:31,682 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:31:31,683 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:31:31,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:31:31,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:31:31,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:31:31,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:31:31,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:31:31,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:31:31,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:31:31,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:31,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:31:31,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:31:31,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:31:31,685 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:31:31,686 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:31,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:31:31,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:31:31,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:31:31,687 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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2021-11-13 01:31:32,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:31:32,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:31:32,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:31:32,099 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:31:32,100 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:31:32,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-13 01:31:32,178 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/data/fd4b3c44c/27bf8090022e4cb4a44bc2112e7a0cea/FLAGd70571f7a [2021-11-13 01:31:32,922 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:31:32,923 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-13 01:31:32,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/data/fd4b3c44c/27bf8090022e4cb4a44bc2112e7a0cea/FLAGd70571f7a [2021-11-13 01:31:33,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/data/fd4b3c44c/27bf8090022e4cb4a44bc2112e7a0cea [2021-11-13 01:31:33,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:31:33,034 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:31:33,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:33,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:31:33,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:31:33,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:33,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774e8418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33, skipping insertion in model container [2021-11-13 01:31:33,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:33,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:31:33,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:31:33,509 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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-13 01:31:33,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:33,537 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:31:33,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:31:33,732 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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-13 01:31:33,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:33,754 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:31:33,938 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_145b3c13-4cbc-4704-b8b9-80e45fdca6af/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-13 01:31:33,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:33,972 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:31:33,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33 WrapperNode [2021-11-13 01:31:33,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:33,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:31:33,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:31:33,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:31:33,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:34,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:34,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:31:34,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:31:34,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:31:34,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:31:34,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:34,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:34,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:34,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:34,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:34,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:34,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:34,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:31:34,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:31:34,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:31:34,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:31:34,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (1/1) ... [2021-11-13 01:31:34,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:34,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:34,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:31:34,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:31:34,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:31:34,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:31:34,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:31:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:31:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:31:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:31:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:31:34,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:31:34,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 01:31:34,502 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-13 01:31:44,381 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-13 01:31:44,381 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-13 01:31:44,391 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:31:44,391 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 01:31:44,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:31:44 BoogieIcfgContainer [2021-11-13 01:31:44,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:31:44,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:31:44,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:31:44,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:31:44,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:31:33" (1/3) ... [2021-11-13 01:31:44,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ec4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:31:44, skipping insertion in model container [2021-11-13 01:31:44,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:33" (2/3) ... [2021-11-13 01:31:44,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ec4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:31:44, skipping insertion in model container [2021-11-13 01:31:44,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:31:44" (3/3) ... [2021-11-13 01:31:44,403 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-1.c [2021-11-13 01:31:44,409 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:31:44,409 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:31:44,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:31:44,473 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 01:31:44,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:31:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 01:31:44,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:44,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:44,505 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-13 01:31:44,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:44,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244565591] [2021-11-13 01:31:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:44,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:44,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:44,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:44,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:31:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:44,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:31:44,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:45,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:45,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:45,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244565591] [2021-11-13 01:31:45,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244565591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:45,366 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:45,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:31:45,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110068521] [2021-11-13 01:31:45,376 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:45,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:45,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:45,416 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:45,661 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-13 01:31:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:45,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-13 01:31:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:45,692 INFO L225 Difference]: With dead ends: 566 [2021-11-13 01:31:45,692 INFO L226 Difference]: Without dead ends: 387 [2021-11-13 01:31:45,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:45,704 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 402 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.43ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.36ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:45,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 670 Invalid, 76 Unknown, 0 Unchecked, 15.43ms Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 134.36ms Time] [2021-11-13 01:31:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-13 01:31:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-13 01:31:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-13 01:31:45,825 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-13 01:31:45,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:45,826 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-13 01:31:45,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-13 01:31:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 01:31:45,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:45,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:45,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:46,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:46,063 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-11-13 01:31:46,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:46,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778090189] [2021-11-13 01:31:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:46,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:46,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:46,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:46,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:31:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:46,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:31:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:46,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:46,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:46,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778090189] [2021-11-13 01:31:46,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778090189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:46,890 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:46,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:31:46,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390335493] [2021-11-13 01:31:46,891 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:46,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:46,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:46,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:46,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:46,894 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:48,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:48,233 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-13 01:31:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:48,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-13 01:31:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:48,240 INFO L225 Difference]: With dead ends: 882 [2021-11-13 01:31:48,240 INFO L226 Difference]: Without dead ends: 631 [2021-11-13 01:31:48,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:48,244 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 305 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1254.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.72ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1302.87ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:48,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 722 Invalid, 79 Unknown, 0 Unchecked, 3.72ms Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1302.87ms Time] [2021-11-13 01:31:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-13 01:31:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-13 01:31:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5222929936305734) internal successors, (956), 628 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-13 01:31:48,277 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-13 01:31:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:48,278 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-13 01:31:48,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-13 01:31:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 01:31:48,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:48,284 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:48,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:48,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:48,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:48,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:48,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1749353389, now seen corresponding path program 1 times [2021-11-13 01:31:48,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:48,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291472213] [2021-11-13 01:31:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:48,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:48,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:48,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:48,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:31:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:48,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:31:48,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:31:49,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:31:49,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:49,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291472213] [2021-11-13 01:31:49,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291472213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:49,769 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:49,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 01:31:49,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764130953] [2021-11-13 01:31:49,770 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:49,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:31:49,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:49,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:31:49,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:31:49,772 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:50,679 INFO L93 Difference]: Finished difference Result 1244 states and 1900 transitions. [2021-11-13 01:31:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:31:50,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-13 01:31:50,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:50,687 INFO L225 Difference]: With dead ends: 1244 [2021-11-13 01:31:50,687 INFO L226 Difference]: Without dead ends: 749 [2021-11-13 01:31:50,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:31:50,690 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 137 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 842.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 872.09ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:50,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 569 Invalid, 33 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 872.09ms Time] [2021-11-13 01:31:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-13 01:31:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2021-11-13 01:31:50,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.518716577540107) internal successors, (1136), 748 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1136 transitions. [2021-11-13 01:31:50,722 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1136 transitions. Word has length 119 [2021-11-13 01:31:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:50,723 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1136 transitions. [2021-11-13 01:31:50,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1136 transitions. [2021-11-13 01:31:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 01:31:50,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:50,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:50,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:50,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:50,942 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:50,943 INFO L85 PathProgramCache]: Analyzing trace with hash 433077792, now seen corresponding path program 1 times [2021-11-13 01:31:50,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:50,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925778792] [2021-11-13 01:31:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:50,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:50,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:50,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:50,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:31:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:51,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:31:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:31:51,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:31:52,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:52,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925778792] [2021-11-13 01:31:52,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925778792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:52,192 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:52,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:31:52,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905850027] [2021-11-13 01:31:52,193 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:52,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:52,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:52,195 INFO L87 Difference]: Start difference. First operand 749 states and 1136 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:53,089 INFO L93 Difference]: Finished difference Result 1611 states and 2457 transitions. [2021-11-13 01:31:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-13 01:31:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:53,099 INFO L225 Difference]: With dead ends: 1611 [2021-11-13 01:31:53,099 INFO L226 Difference]: Without dead ends: 996 [2021-11-13 01:31:53,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:53,103 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 296 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 795.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.66ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 836.19ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:53,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 731 Invalid, 78 Unknown, 0 Unchecked, 3.66ms Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 836.19ms Time] [2021-11-13 01:31:53,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-13 01:31:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 996. [2021-11-13 01:31:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.5155778894472363) internal successors, (1508), 995 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1508 transitions. [2021-11-13 01:31:53,152 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1508 transitions. Word has length 143 [2021-11-13 01:31:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:53,154 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1508 transitions. [2021-11-13 01:31:53,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1508 transitions. [2021-11-13 01:31:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 01:31:53,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:53,166 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:53,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:53,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:53,380 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:53,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1349783187, now seen corresponding path program 1 times [2021-11-13 01:31:53,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:53,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816725054] [2021-11-13 01:31:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:53,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:53,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:53,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:53,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:31:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:53,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:31:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:31:54,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:31:54,744 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:54,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816725054] [2021-11-13 01:31:54,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816725054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:54,745 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:54,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:31:54,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510400646] [2021-11-13 01:31:54,745 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:54,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:54,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:54,747 INFO L87 Difference]: Start difference. First operand 996 states and 1508 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:55,579 INFO L93 Difference]: Finished difference Result 2102 states and 3195 transitions. [2021-11-13 01:31:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-13 01:31:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:55,589 INFO L225 Difference]: With dead ends: 2102 [2021-11-13 01:31:55,589 INFO L226 Difference]: Without dead ends: 1240 [2021-11-13 01:31:55,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:55,592 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 295 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 733.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 767.51ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:55,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 728 Invalid, 75 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 767.51ms Time] [2021-11-13 01:31:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-13 01:31:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-13 01:31:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.5125100887812752) internal successors, (1874), 1239 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1874 transitions. [2021-11-13 01:31:55,664 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1874 transitions. Word has length 165 [2021-11-13 01:31:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:55,664 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1874 transitions. [2021-11-13 01:31:55,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:31:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1874 transitions. [2021-11-13 01:31:55,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-13 01:31:55,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:55,669 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:55,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:55,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:55,887 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:31:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:55,887 INFO L85 PathProgramCache]: Analyzing trace with hash -381805375, now seen corresponding path program 1 times [2021-11-13 01:31:55,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:55,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543583657] [2021-11-13 01:31:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:55,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:55,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:55,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:55,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:31:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:56,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:31:56,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:57,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 01:31:57,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 01:31:57,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:57,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-13 01:31:57,114 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:57,117 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-13 01:31:57,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-13 01:31:57,695 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-13 01:31:57,695 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 [2021-11-13 01:31:57,796 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:57,799 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-13 01:31:57,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:57,814 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-13 01:31:57,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-13 01:31:57,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:57,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-13 01:31:58,136 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-13 01:31:58,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-13 01:31:58,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:58,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:58,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:58,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:58,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:58,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:58,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:58,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:31:58,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-13 01:31:58,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-13 01:31:58,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-13 01:31:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-13 01:31:58,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:59,353 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:59,358 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-13 01:31:59,363 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:59,368 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-13 01:31:59,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:59,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-13 01:31:59,557 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:59,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-13 01:31:59,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:59,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-13 01:31:59,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:59,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-13 01:31:59,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:59,625 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-13 01:31:59,650 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:31:59,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-13 01:32:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-13 01:32:00,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:00,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543583657] [2021-11-13 01:32:00,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543583657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:00,253 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:00,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 01:32:00,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643702778] [2021-11-13 01:32:00,253 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:00,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:32:00,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:00,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:32:00,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:32:00,255 INFO L87 Difference]: Start difference. First operand 1240 states and 1874 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:32:02,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:04,303 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:06,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:08,272 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:13,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:19,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:20,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:24,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:27,316 INFO L93 Difference]: Finished difference Result 2477 states and 3744 transitions. [2021-11-13 01:32:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:32:27,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-11-13 01:32:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:27,328 INFO L225 Difference]: With dead ends: 2477 [2021-11-13 01:32:27,328 INFO L226 Difference]: Without dead ends: 1240 [2021-11-13 01:32:27,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:32:27,342 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26370.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.38ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 26913.93ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:27,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 931 Invalid, 330 Unknown, 0 Unchecked, 5.38ms Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 3 Unknown, 60 Unchecked, 26913.93ms Time] [2021-11-13 01:32:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-13 01:32:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-13 01:32:27,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.5117029862792575) internal successors, (1873), 1239 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:32:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1873 transitions. [2021-11-13 01:32:27,402 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1873 transitions. Word has length 172 [2021-11-13 01:32:27,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:27,402 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1873 transitions. [2021-11-13 01:32:27,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:32:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1873 transitions. [2021-11-13 01:32:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-13 01:32:27,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:27,408 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:27,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:27,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:27,622 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1884903681, now seen corresponding path program 1 times [2021-11-13 01:32:27,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:27,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999846039] [2021-11-13 01:32:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:27,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:27,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:27,626 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:27,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:32:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:28,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:32:28,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:28,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:28,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:32:28,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:32:28,826 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 01:32:28,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 01:32:28,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:32:28,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:32:28,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:32:29,419 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 01:32:29,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 01:32:31,190 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:32:31,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 01:32:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 01:32:31,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 01:32:32,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:32,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999846039] [2021-11-13 01:32:32,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999846039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:32,267 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:32,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 01:32:32,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710419536] [2021-11-13 01:32:32,268 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:32,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:32:32,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:32:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:32:32,271 INFO L87 Difference]: Start difference. First operand 1240 states and 1873 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) [2021-11-13 01:32:34,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:36,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:38,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:41,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:43,474 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:44,829 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:52,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:56,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:57,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:01,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:04,452 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:06,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:09,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:14,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:16,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:29,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:31,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:39,828 INFO L93 Difference]: Finished difference Result 4654 states and 7069 transitions. [2021-11-13 01:33:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:33:39,832 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 172 [2021-11-13 01:33:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:39,857 INFO L225 Difference]: With dead ends: 4654 [2021-11-13 01:33:39,858 INFO L226 Difference]: Without dead ends: 3424 [2021-11-13 01:33:39,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:33:39,866 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 259 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 74 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65746.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.20ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67256.65ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:39,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 891 Invalid, 929 Unknown, 0 Unchecked, 12.20ms Time], IncrementalHoareTripleChecker [74 Valid, 849 Invalid, 6 Unknown, 0 Unchecked, 67256.65ms Time] [2021-11-13 01:33:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-11-13 01:33:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 1489. [2021-11-13 01:33:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.5470430107526882) internal successors, (2302), 1488 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:33:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2302 transitions. [2021-11-13 01:33:40,051 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2302 transitions. Word has length 172 [2021-11-13 01:33:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:40,052 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 2302 transitions. [2021-11-13 01:33:40,052 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) [2021-11-13 01:33:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2302 transitions. [2021-11-13 01:33:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-13 01:33:40,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:40,058 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:40,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-13 01:33:40,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:40,270 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1462011649, now seen corresponding path program 1 times [2021-11-13 01:33:40,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:40,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454383893] [2021-11-13 01:33:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:40,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:40,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:40,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:40,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:33:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:41,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:33:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:33:41,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:33:41,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:33:41,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:33:41,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:33:41,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:33:42,038 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:33:42,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:33:43,743 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:33:43,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:33:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:33:43,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:33:44,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:44,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454383893] [2021-11-13 01:33:44,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454383893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:44,453 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:44,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:33:44,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860368525] [2021-11-13 01:33:44,454 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:44,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:33:44,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:44,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:33:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:33:44,456 INFO L87 Difference]: Start difference. First operand 1489 states and 2302 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) [2021-11-13 01:33:46,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:48,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:49,838 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:53,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:58,132 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:04,970 INFO L93 Difference]: Finished difference Result 3604 states and 5571 transitions. [2021-11-13 01:34:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:34:04,976 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 172 [2021-11-13 01:34:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:05,000 INFO L225 Difference]: With dead ends: 3604 [2021-11-13 01:34:05,001 INFO L226 Difference]: Without dead ends: 2125 [2021-11-13 01:34:05,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:05,004 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 110 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19827.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.38ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20327.08ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:05,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 615 Invalid, 238 Unknown, 0 Unchecked, 4.38ms Time], IncrementalHoareTripleChecker [18 Valid, 218 Invalid, 2 Unknown, 0 Unchecked, 20327.08ms Time] [2021-11-13 01:34:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-11-13 01:34:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1769. [2021-11-13 01:34:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 1.579185520361991) internal successors, (2792), 1768 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2792 transitions. [2021-11-13 01:34:05,149 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2792 transitions. Word has length 172 [2021-11-13 01:34:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:05,149 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2792 transitions. [2021-11-13 01:34:05,150 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) [2021-11-13 01:34:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2792 transitions. [2021-11-13 01:34:05,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-13 01:34:05,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:05,161 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:05,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:05,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:05,386 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:05,387 INFO L85 PathProgramCache]: Analyzing trace with hash 991422329, now seen corresponding path program 1 times [2021-11-13 01:34:05,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:05,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363197309] [2021-11-13 01:34:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:05,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:05,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:05,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:05,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:34:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:06,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:06,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:06,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:06,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:06,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:06,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:06,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:06,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:06,963 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:34:06,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:34:07,736 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:34:07,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:34:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:34:07,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:34:08,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:08,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363197309] [2021-11-13 01:34:08,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363197309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:08,533 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:08,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:34:08,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158482301] [2021-11-13 01:34:08,533 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:08,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:34:08,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:34:08,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:08,535 INFO L87 Difference]: Start difference. First operand 1769 states and 2792 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:10,567 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:12,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:17,554 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:19,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:20,925 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:27,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:31,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:32,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:38,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:40,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:41,362 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 [] [2021-11-13 01:34:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:49,696 INFO L93 Difference]: Finished difference Result 5243 states and 8185 transitions. [2021-11-13 01:34:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:34:49,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-13 01:34:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:49,744 INFO L225 Difference]: With dead ends: 5243 [2021-11-13 01:34:49,744 INFO L226 Difference]: Without dead ends: 3484 [2021-11-13 01:34:49,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:34:49,751 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 210 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 69 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40028.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.54ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40897.17ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:49,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 564 Invalid, 553 Unknown, 0 Unchecked, 5.54ms Time], IncrementalHoareTripleChecker [69 Valid, 481 Invalid, 3 Unknown, 0 Unchecked, 40897.17ms Time] [2021-11-13 01:34:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2021-11-13 01:34:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 2073. [2021-11-13 01:34:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 1.5810810810810811) internal successors, (3276), 2072 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3276 transitions. [2021-11-13 01:34:49,941 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3276 transitions. Word has length 185 [2021-11-13 01:34:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:49,942 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 3276 transitions. [2021-11-13 01:34:49,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3276 transitions. [2021-11-13 01:34:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-13 01:34:49,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:49,950 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:49,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:50,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:50,173 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:50,174 INFO L85 PathProgramCache]: Analyzing trace with hash -503738714, now seen corresponding path program 1 times [2021-11-13 01:34:50,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:50,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451776651] [2021-11-13 01:34:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:50,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:50,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:50,176 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:50,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:34:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:51,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:34:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:51,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:34:51,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:51,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:51,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:51,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:51,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:34:52,236 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:34:52,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:34:52,654 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:34:52,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:34:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:34:52,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:34:53,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:53,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451776651] [2021-11-13 01:34:53,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451776651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:53,418 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:53,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:34:53,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798125131] [2021-11-13 01:34:53,419 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:53,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:34:53,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:53,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:34:53,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:53,421 INFO L87 Difference]: Start difference. First operand 2073 states and 3276 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:34:55,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:57,472 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:59,780 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:04,460 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:10,426 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:15,020 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:16,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:20,353 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:22,572 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:24,522 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 [] [2021-11-13 01:35:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:39,530 INFO L93 Difference]: Finished difference Result 5447 states and 8470 transitions. [2021-11-13 01:35:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:35:39,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-13 01:35:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:39,559 INFO L225 Difference]: With dead ends: 5447 [2021-11-13 01:35:39,559 INFO L226 Difference]: Without dead ends: 3384 [2021-11-13 01:35:39,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:35:39,564 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 219 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44724.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.18ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45765.67ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:39,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 687 Invalid, 688 Unknown, 0 Unchecked, 6.18ms Time], IncrementalHoareTripleChecker [69 Valid, 617 Invalid, 2 Unknown, 0 Unchecked, 45765.67ms Time] [2021-11-13 01:35:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-11-13 01:35:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2073. [2021-11-13 01:35:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 1.5622586872586872) internal successors, (3237), 2072 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3237 transitions. [2021-11-13 01:35:39,784 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3237 transitions. Word has length 186 [2021-11-13 01:35:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:39,785 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 3237 transitions. [2021-11-13 01:35:39,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3237 transitions. [2021-11-13 01:35:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-13 01:35:39,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:39,792 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:39,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:35:40,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:40,009 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:40,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash 790677906, now seen corresponding path program 1 times [2021-11-13 01:35:40,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:40,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464162678] [2021-11-13 01:35:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:40,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:40,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:40,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:40,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:35:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:35:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:35:41,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:41,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:41,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:41,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:41,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:35:41,769 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:35:41,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:35:42,438 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:35:42,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:35:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:35:42,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:35:43,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:43,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464162678] [2021-11-13 01:35:43,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464162678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:43,198 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:43,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:35:43,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230460686] [2021-11-13 01:35:43,198 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:43,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:35:43,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:35:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:35:43,200 INFO L87 Difference]: Start difference. First operand 2073 states and 3237 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:35:45,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:47,238 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:49,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:51,046 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:53,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:57,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:03,216 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:10,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:11,609 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:27,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:29,526 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:29,756 INFO L93 Difference]: Finished difference Result 5663 states and 8752 transitions. [2021-11-13 01:36:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:36:29,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-13 01:36:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:29,780 INFO L225 Difference]: With dead ends: 5663 [2021-11-13 01:36:29,780 INFO L226 Difference]: Without dead ends: 3600 [2021-11-13 01:36:29,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:36:29,785 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 215 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 65 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45199.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.32ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46258.67ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:29,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 777 Invalid, 689 Unknown, 0 Unchecked, 5.32ms Time], IncrementalHoareTripleChecker [65 Valid, 621 Invalid, 3 Unknown, 0 Unchecked, 46258.67ms Time] [2021-11-13 01:36:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-11-13 01:36:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2181. [2021-11-13 01:36:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.5412844036697249) internal successors, (3360), 2180 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3360 transitions. [2021-11-13 01:36:30,014 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3360 transitions. Word has length 186 [2021-11-13 01:36:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:30,014 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3360 transitions. [2021-11-13 01:36:30,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3360 transitions. [2021-11-13 01:36:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-13 01:36:30,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:30,022 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:30,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:30,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:30,247 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2111383387, now seen corresponding path program 1 times [2021-11-13 01:36:30,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:30,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544383812] [2021-11-13 01:36:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:30,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:30,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:30,274 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:30,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:36:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:31,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:36:31,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:31,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:36:31,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:31,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:31,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:31,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:31,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:36:32,030 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:36:32,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:36:33,046 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:36:33,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:36:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:36:33,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:36:33,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:33,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544383812] [2021-11-13 01:36:33,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544383812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:33,842 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:33,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:36:33,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351041278] [2021-11-13 01:36:33,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:33,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:36:33,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:33,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:36:33,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:36:33,844 INFO L87 Difference]: Start difference. First operand 2181 states and 3360 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:35,870 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:40,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:42,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:52,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:54,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:55,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:00,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:02,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:03,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:09,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:21,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:22,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:22,720 INFO L93 Difference]: Finished difference Result 5643 states and 8618 transitions. [2021-11-13 01:37:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:37:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-13 01:37:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:22,750 INFO L225 Difference]: With dead ends: 5643 [2021-11-13 01:37:22,750 INFO L226 Difference]: Without dead ends: 3472 [2021-11-13 01:37:22,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:37:22,754 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 202 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 68 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47492.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.65ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48581.59ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:22,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 680 Invalid, 672 Unknown, 0 Unchecked, 4.65ms Time], IncrementalHoareTripleChecker [68 Valid, 602 Invalid, 2 Unknown, 0 Unchecked, 48581.59ms Time] [2021-11-13 01:37:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2021-11-13 01:37:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 2199. [2021-11-13 01:37:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 1.5318471337579618) internal successors, (3367), 2198 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:37:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 3367 transitions. [2021-11-13 01:37:22,956 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 3367 transitions. Word has length 186 [2021-11-13 01:37:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:22,957 INFO L470 AbstractCegarLoop]: Abstraction has 2199 states and 3367 transitions. [2021-11-13 01:37:22,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:37:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 3367 transitions. [2021-11-13 01:37:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-13 01:37:22,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:22,964 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:22,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:23,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:23,190 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:23,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1645926757, now seen corresponding path program 1 times [2021-11-13 01:37:23,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:23,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597393966] [2021-11-13 01:37:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:23,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:23,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:23,194 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:23,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:37:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:37:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:24,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:37:24,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:37:24,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:37:24,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:37:24,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:37:24,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:37:24,873 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:37:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:37:25,753 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:37:25,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:37:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:37:25,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:37:26,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:26,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597393966] [2021-11-13 01:37:26,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597393966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:37:26,529 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:37:26,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:37:26,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92209896] [2021-11-13 01:37:26,529 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:26,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:37:26,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:37:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:37:26,530 INFO L87 Difference]: Start difference. First operand 2199 states and 3367 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:37:28,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:30,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:32,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:33,371 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:42,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:44,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:49,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:53,052 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:37:57,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:08,854 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:11,408 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:38:12,566 INFO L93 Difference]: Finished difference Result 5641 states and 8576 transitions. [2021-11-13 01:38:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:38:12,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-13 01:38:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:38:12,578 INFO L225 Difference]: With dead ends: 5641 [2021-11-13 01:38:12,579 INFO L226 Difference]: Without dead ends: 3452 [2021-11-13 01:38:12,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:38:12,583 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 202 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 66 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44682.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.48ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45729.84ms IncrementalHoareTripleChecker+Time [2021-11-13 01:38:12,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 700 Invalid, 673 Unknown, 0 Unchecked, 4.48ms Time], IncrementalHoareTripleChecker [66 Valid, 604 Invalid, 3 Unknown, 0 Unchecked, 45729.84ms Time] [2021-11-13 01:38:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2021-11-13 01:38:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 2199. [2021-11-13 01:38:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 1.518653321201092) internal successors, (3338), 2198 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:38:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 3338 transitions. [2021-11-13 01:38:12,791 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 3338 transitions. Word has length 186 [2021-11-13 01:38:12,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:38:12,792 INFO L470 AbstractCegarLoop]: Abstraction has 2199 states and 3338 transitions. [2021-11-13 01:38:12,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:38:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 3338 transitions. [2021-11-13 01:38:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-13 01:38:12,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:38:12,800 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:38:12,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:38:13,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:38:13,027 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:38:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:38:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash -855064592, now seen corresponding path program 1 times [2021-11-13 01:38:13,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:38:13,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764768702] [2021-11-13 01:38:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:13,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:38:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:38:13,032 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:38:13,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:38:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:38:14,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:38:14,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:38:14,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:14,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:14,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:14,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:14,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:38:14,886 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:38:14,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:38:15,441 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:38:15,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:38:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:38:15,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:38:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:38:16,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:16,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764768702] [2021-11-13 01:38:16,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764768702] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:38:16,174 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:38:16,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:38:16,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648712083] [2021-11-13 01:38:16,174 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:38:16,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:38:16,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:38:16,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:38:16,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:38:16,176 INFO L87 Difference]: Start difference. First operand 2199 states and 3338 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:38:18,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:20,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:22,482 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:23,908 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:32,995 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:35,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:36,716 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:39,797 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:41,809 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:43,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:48,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:38:59,451 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:00,571 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:01,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:03,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:03,693 INFO L93 Difference]: Finished difference Result 5749 states and 8698 transitions. [2021-11-13 01:39:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:39:03,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-13 01:39:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:03,704 INFO L225 Difference]: With dead ends: 5749 [2021-11-13 01:39:03,704 INFO L226 Difference]: Without dead ends: 3560 [2021-11-13 01:39:03,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:39:03,708 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 207 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 63 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46096.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.70ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47191.78ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:03,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 771 Invalid, 674 Unknown, 0 Unchecked, 4.70ms Time], IncrementalHoareTripleChecker [63 Valid, 607 Invalid, 4 Unknown, 0 Unchecked, 47191.78ms Time] [2021-11-13 01:39:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-11-13 01:39:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2208. [2021-11-13 01:39:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 1.5029451744449478) internal successors, (3317), 2207 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 3317 transitions. [2021-11-13 01:39:03,910 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 3317 transitions. Word has length 187 [2021-11-13 01:39:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:03,910 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 3317 transitions. [2021-11-13 01:39:03,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 3317 transitions. [2021-11-13 01:39:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-13 01:39:03,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:03,918 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:03,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:04,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:39:04,134 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash -711546899, now seen corresponding path program 1 times [2021-11-13 01:39:04,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:04,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353568744] [2021-11-13 01:39:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:04,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:04,137 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:04,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:39:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:39:05,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:05,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:05,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:05,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:05,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:05,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:05,919 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:39:05,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:39:06,570 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:39:06,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:39:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:39:06,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:39:07,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:07,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353568744] [2021-11-13 01:39:07,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353568744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:07,427 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:07,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:39:07,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820272034] [2021-11-13 01:39:07,428 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:07,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:39:07,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:07,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:39:07,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:39:07,430 INFO L87 Difference]: Start difference. First operand 2208 states and 3317 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:09,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:11,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:12,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:13,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:21,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:29,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:46,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:48,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:50,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:39:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:50,737 INFO L93 Difference]: Finished difference Result 5758 states and 8638 transitions. [2021-11-13 01:39:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:39:50,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-13 01:39:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:50,747 INFO L225 Difference]: With dead ends: 5758 [2021-11-13 01:39:50,747 INFO L226 Difference]: Without dead ends: 3560 [2021-11-13 01:39:50,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:39:50,751 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 203 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 63 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41892.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.45ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42925.56ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:50,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 768 Invalid, 672 Unknown, 0 Unchecked, 4.45ms Time], IncrementalHoareTripleChecker [63 Valid, 606 Invalid, 3 Unknown, 0 Unchecked, 42925.56ms Time] [2021-11-13 01:39:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-11-13 01:39:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2217. [2021-11-13 01:39:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 1.4873646209386282) internal successors, (3296), 2216 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3296 transitions. [2021-11-13 01:39:50,939 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3296 transitions. Word has length 188 [2021-11-13 01:39:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:50,940 INFO L470 AbstractCegarLoop]: Abstraction has 2217 states and 3296 transitions. [2021-11-13 01:39:50,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3296 transitions. [2021-11-13 01:39:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 01:39:50,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:50,946 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:50,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:51,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:39:51,163 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:51,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:51,163 INFO L85 PathProgramCache]: Analyzing trace with hash -935538133, now seen corresponding path program 1 times [2021-11-13 01:39:51,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:51,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086039056] [2021-11-13 01:39:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:51,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:51,165 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:51,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:39:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:52,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:39:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:52,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:39:52,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:52,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:52,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:52,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:52,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:39:52,886 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:39:52,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:39:53,639 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:39:53,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:39:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:39:53,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:39:54,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:54,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086039056] [2021-11-13 01:39:54,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086039056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:54,321 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:54,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:39:54,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473353927] [2021-11-13 01:39:54,321 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:54,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:39:54,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:54,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:39:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:39:54,322 INFO L87 Difference]: Start difference. First operand 2217 states and 3296 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:56,352 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:02,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:05,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:10,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:13,849 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:17,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:19,533 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:27,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:29,217 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 [] [2021-11-13 01:40:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:40:33,027 INFO L93 Difference]: Finished difference Result 5567 states and 8291 transitions. [2021-11-13 01:40:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:40:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-13 01:40:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:40:33,035 INFO L225 Difference]: With dead ends: 5567 [2021-11-13 01:40:33,035 INFO L226 Difference]: Without dead ends: 3360 [2021-11-13 01:40:33,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:40:33,039 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 195 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37502.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.09ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38387.43ms IncrementalHoareTripleChecker+Time [2021-11-13 01:40:33,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 723 Invalid, 649 Unknown, 0 Unchecked, 4.09ms Time], IncrementalHoareTripleChecker [60 Valid, 587 Invalid, 2 Unknown, 0 Unchecked, 38387.43ms Time] [2021-11-13 01:40:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-11-13 01:40:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2217. [2021-11-13 01:40:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 1.4697653429602888) internal successors, (3257), 2216 states have internal predecessors, (3257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3257 transitions. [2021-11-13 01:40:33,231 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3257 transitions. Word has length 189 [2021-11-13 01:40:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:40:33,232 INFO L470 AbstractCegarLoop]: Abstraction has 2217 states and 3257 transitions. [2021-11-13 01:40:33,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3257 transitions. [2021-11-13 01:40:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 01:40:33,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:40:33,238 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:40:33,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:40:33,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:40:33,463 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:40:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:40:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1463772801, now seen corresponding path program 1 times [2021-11-13 01:40:33,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:40:33,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110655743] [2021-11-13 01:40:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:40:33,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:40:33,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:40:33,466 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:40:33,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:40:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:40:34,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:40:34,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:34,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:40:34,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:34,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:34,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:40:35,049 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:40:35,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:40:36,080 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:40:36,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:40:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:40:36,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:40:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:40:36,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:40:36,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110655743] [2021-11-13 01:40:36,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110655743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:40:36,854 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:40:36,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:40:36,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895506438] [2021-11-13 01:40:36,855 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:40:36,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:40:36,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:40:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:40:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:40:36,858 INFO L87 Difference]: Start difference. First operand 2217 states and 3257 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:40:38,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:40,012 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:45,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:47,301 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:50,911 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:53,775 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:40:58,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:00,404 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:10,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:14,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:18,165 INFO L93 Difference]: Finished difference Result 5584 states and 8228 transitions. [2021-11-13 01:41:18,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:41:18,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-13 01:41:18,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:18,179 INFO L225 Difference]: With dead ends: 5584 [2021-11-13 01:41:18,180 INFO L226 Difference]: Without dead ends: 3600 [2021-11-13 01:41:18,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:41:18,183 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 177 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39878.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.95ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40932.75ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:18,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1193 Invalid, 702 Unknown, 0 Unchecked, 4.95ms Time], IncrementalHoareTripleChecker [41 Valid, 659 Invalid, 2 Unknown, 0 Unchecked, 40932.75ms Time] [2021-11-13 01:41:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-11-13 01:41:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2416. [2021-11-13 01:41:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 1.4476190476190476) internal successors, (3496), 2415 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3496 transitions. [2021-11-13 01:41:18,408 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3496 transitions. Word has length 189 [2021-11-13 01:41:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:18,409 INFO L470 AbstractCegarLoop]: Abstraction has 2416 states and 3496 transitions. [2021-11-13 01:41:18,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3496 transitions. [2021-11-13 01:41:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-13 01:41:18,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:18,415 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:18,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:18,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:18,638 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash -70761122, now seen corresponding path program 1 times [2021-11-13 01:41:18,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:18,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950547348] [2021-11-13 01:41:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:18,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:18,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:18,641 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:18,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:41:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:19,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:41:19,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:41:19,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:41:19,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:41:19,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:41:19,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:41:20,213 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:41:20,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:41:21,313 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:41:21,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:41:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:41:21,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:41:22,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:22,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950547348] [2021-11-13 01:41:22,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950547348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:41:22,095 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:41:22,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:41:22,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750662436] [2021-11-13 01:41:22,098 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:22,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:41:22,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:41:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:22,105 INFO L87 Difference]: Start difference. First operand 2416 states and 3496 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:41:24,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:25,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:34,350 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:37,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:41,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:42,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:44,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:45,753 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:49,251 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:41:59,706 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:01,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:05,970 INFO L93 Difference]: Finished difference Result 5774 states and 8426 transitions. [2021-11-13 01:42:05,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:42:05,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-11-13 01:42:05,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:05,979 INFO L225 Difference]: With dead ends: 5774 [2021-11-13 01:42:05,979 INFO L226 Difference]: Without dead ends: 3611 [2021-11-13 01:42:05,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:42:05,983 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 182 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42509.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43507.01ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:05,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 693 Invalid, 637 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [59 Valid, 577 Invalid, 1 Unknown, 0 Unchecked, 43507.01ms Time] [2021-11-13 01:42:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-11-13 01:42:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2446. [2021-11-13 01:42:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 2445 states have (on average 1.4384458077709612) internal successors, (3517), 2445 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3517 transitions. [2021-11-13 01:42:06,222 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3517 transitions. Word has length 190 [2021-11-13 01:42:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:06,222 INFO L470 AbstractCegarLoop]: Abstraction has 2446 states and 3517 transitions. [2021-11-13 01:42:06,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3517 transitions. [2021-11-13 01:42:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-13 01:42:06,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:06,243 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:42:06,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:06,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:42:06,466 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:06,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1700911676, now seen corresponding path program 1 times [2021-11-13 01:42:06,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:42:06,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194220841] [2021-11-13 01:42:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:06,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:42:06,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:42:06,469 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:42:06,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:42:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:42:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:07,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:07,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:07,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:07,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:07,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:07,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:08,071 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:42:08,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:42:09,325 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:42:09,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:42:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:42:09,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:42:10,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:10,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194220841] [2021-11-13 01:42:10,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194220841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:42:10,153 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:42:10,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:42:10,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086241797] [2021-11-13 01:42:10,154 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:42:10,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:42:10,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:10,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:42:10,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:42:10,155 INFO L87 Difference]: Start difference. First operand 2446 states and 3517 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:12,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:14,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:20,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:22,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:23,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:25,786 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:27,520 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:38,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:39,359 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 [] [2021-11-13 01:42:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:44,762 INFO L93 Difference]: Finished difference Result 5962 states and 8621 transitions. [2021-11-13 01:42:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:42:44,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-13 01:42:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:44,771 INFO L225 Difference]: With dead ends: 5962 [2021-11-13 01:42:44,772 INFO L226 Difference]: Without dead ends: 3782 [2021-11-13 01:42:44,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:42:44,776 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 177 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33398.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.67ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34201.66ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:44,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 527 Invalid, 496 Unknown, 0 Unchecked, 3.67ms Time], IncrementalHoareTripleChecker [57 Valid, 438 Invalid, 1 Unknown, 0 Unchecked, 34201.66ms Time] [2021-11-13 01:42:44,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-11-13 01:42:44,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 2665. [2021-11-13 01:42:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2664 states have (on average 1.4174174174174174) internal successors, (3776), 2664 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 3776 transitions. [2021-11-13 01:42:44,967 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 3776 transitions. Word has length 191 [2021-11-13 01:42:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:44,967 INFO L470 AbstractCegarLoop]: Abstraction has 2665 states and 3776 transitions. [2021-11-13 01:42:44,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 3776 transitions. [2021-11-13 01:42:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-13 01:42:44,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:44,971 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:42:44,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:45,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:42:45,172 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:45,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1281413366, now seen corresponding path program 1 times [2021-11-13 01:42:45,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:42:45,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993568779] [2021-11-13 01:42:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:45,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:42:45,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:42:45,177 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:42:45,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:42:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:46,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:42:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:46,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:46,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:46,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:46,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:46,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:46,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:42:46,833 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:42:46,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:42:48,060 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:42:48,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:42:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:42:48,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:42:48,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:48,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993568779] [2021-11-13 01:42:48,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993568779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:42:48,826 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:42:48,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:42:48,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6704300] [2021-11-13 01:42:48,826 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:42:48,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:42:48,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:48,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:42:48,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:42:48,827 INFO L87 Difference]: Start difference. First operand 2665 states and 3776 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:42:50,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:52,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:55,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:42:58,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:01,098 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:02,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:03,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:07,272 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:08,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:11,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:20,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:22,208 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 [] [2021-11-13 01:43:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:43:24,810 INFO L93 Difference]: Finished difference Result 6612 states and 9430 transitions. [2021-11-13 01:43:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:43:24,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-11-13 01:43:24,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:43:24,822 INFO L225 Difference]: With dead ends: 6612 [2021-11-13 01:43:24,823 INFO L226 Difference]: Without dead ends: 3968 [2021-11-13 01:43:24,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:43:24,827 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 174 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34784.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.78ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35588.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:43:24,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 590 Invalid, 514 Unknown, 0 Unchecked, 3.78ms Time], IncrementalHoareTripleChecker [57 Valid, 455 Invalid, 2 Unknown, 0 Unchecked, 35588.00ms Time] [2021-11-13 01:43:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2021-11-13 01:43:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 2872. [2021-11-13 01:43:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.399164054336468) internal successors, (4017), 2871 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:43:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 4017 transitions. [2021-11-13 01:43:25,181 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 4017 transitions. Word has length 194 [2021-11-13 01:43:25,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:43:25,182 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 4017 transitions. [2021-11-13 01:43:25,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:43:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 4017 transitions. [2021-11-13 01:43:25,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 01:43:25,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:43:25,188 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:43:25,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-13 01:43:25,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:43:25,389 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:43:25,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:43:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1834561464, now seen corresponding path program 1 times [2021-11-13 01:43:25,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:43:25,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475483576] [2021-11-13 01:43:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:43:25,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:43:25,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:43:25,392 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:43:25,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:43:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:43:26,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:43:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:43:26,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:26,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:26,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:26,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:26,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:26,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:43:26,994 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:43:26,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:43:28,270 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:43:28,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:43:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:43:28,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:43:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:43:29,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:43:29,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475483576] [2021-11-13 01:43:29,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475483576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:43:29,053 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:43:29,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:43:29,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523034958] [2021-11-13 01:43:29,053 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:43:29,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:43:29,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:43:29,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:43:29,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:43:29,055 INFO L87 Difference]: Start difference. First operand 2872 states and 4017 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:43:31,077 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:33,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:40,012 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:43,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:45,165 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:47,243 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:48,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:51,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:43:59,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:02,628 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:44:06,122 INFO L93 Difference]: Finished difference Result 6759 states and 9558 transitions. [2021-11-13 01:44:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:44:06,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 01:44:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:44:06,131 INFO L225 Difference]: With dead ends: 6759 [2021-11-13 01:44:06,132 INFO L226 Difference]: Without dead ends: 3908 [2021-11-13 01:44:06,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:44:06,137 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 167 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 59 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35797.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.84ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36613.97ms IncrementalHoareTripleChecker+Time [2021-11-13 01:44:06,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 524 Invalid, 490 Unknown, 0 Unchecked, 3.84ms Time], IncrementalHoareTripleChecker [59 Valid, 429 Invalid, 2 Unknown, 0 Unchecked, 36613.97ms Time] [2021-11-13 01:44:06,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3908 states. [2021-11-13 01:44:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3908 to 2881. [2021-11-13 01:44:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 1.3909722222222223) internal successors, (4006), 2880 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:44:06,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 4006 transitions. [2021-11-13 01:44:06,500 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 4006 transitions. Word has length 195 [2021-11-13 01:44:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:44:06,501 INFO L470 AbstractCegarLoop]: Abstraction has 2881 states and 4006 transitions. [2021-11-13 01:44:06,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:44:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 4006 transitions. [2021-11-13 01:44:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 01:44:06,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:44:06,507 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:44:06,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:44:06,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:44:06,722 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:44:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:44:06,722 INFO L85 PathProgramCache]: Analyzing trace with hash 585189628, now seen corresponding path program 1 times [2021-11-13 01:44:06,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:44:06,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582055086] [2021-11-13 01:44:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:06,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:44:06,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:44:06,725 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:44:06,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 01:44:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:07,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:44:07,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:08,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:08,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:08,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:08,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:08,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:08,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:08,549 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-13 01:44:08,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-13 01:44:09,929 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 01:44:09,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-13 01:44:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:44:10,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:44:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-13 01:44:10,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:44:10,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582055086] [2021-11-13 01:44:10,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582055086] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:44:10,748 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:44:10,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:44:10,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104365155] [2021-11-13 01:44:10,749 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:44:10,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:44:10,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:44:10,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:44:10,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:44:10,751 INFO L87 Difference]: Start difference. First operand 2881 states and 4006 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:44:12,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:14,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:18,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:22,979 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:24,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:29,846 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:30,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:32,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:36,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:38,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:44,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:46,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:48,654 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:44:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:44:52,464 INFO L93 Difference]: Finished difference Result 6714 states and 9448 transitions. [2021-11-13 01:44:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:44:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 195 [2021-11-13 01:44:52,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:44:52,472 INFO L225 Difference]: With dead ends: 6714 [2021-11-13 01:44:52,472 INFO L226 Difference]: Without dead ends: 3854 [2021-11-13 01:44:52,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:44:52,477 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 155 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40349.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.16ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41278.41ms IncrementalHoareTripleChecker+Time [2021-11-13 01:44:52,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 715 Invalid, 624 Unknown, 0 Unchecked, 4.16ms Time], IncrementalHoareTripleChecker [58 Valid, 564 Invalid, 2 Unknown, 0 Unchecked, 41278.41ms Time] [2021-11-13 01:44:52,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-11-13 01:44:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 2900. [2021-11-13 01:44:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 1.388064849948258) internal successors, (4024), 2899 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:44:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 4024 transitions. [2021-11-13 01:44:52,843 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 4024 transitions. Word has length 195 [2021-11-13 01:44:52,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:44:52,844 INFO L470 AbstractCegarLoop]: Abstraction has 2900 states and 4024 transitions. [2021-11-13 01:44:52,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:44:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 4024 transitions. [2021-11-13 01:44:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-13 01:44:52,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:44:52,850 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:44:52,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-13 01:44:53,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:44:53,052 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:44:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:44:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash -396295493, now seen corresponding path program 1 times [2021-11-13 01:44:53,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:44:53,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432476407] [2021-11-13 01:44:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:44:53,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:44:53,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:44:53,055 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:44:53,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145b3c13-4cbc-4704-b8b9-80e45fdca6af/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 01:44:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:44:54,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:44:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:54,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 138 [2021-11-13 01:44:54,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 90 [2021-11-13 01:44:54,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:54,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:54,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:54,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:54,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:44:54,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:54,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:44:54,346 INFO L190 IndexEqualityManager]: detected not equals via solver