./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8 --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 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:22:33,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:22:33,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:22:33,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:22:33,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:22:33,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:22:33,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:22:33,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:22:33,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:22:33,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:22:33,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:22:33,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:22:33,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:22:33,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:22:33,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:22:33,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:22:33,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:22:33,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:22:33,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:22:33,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:22:33,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:22:33,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:22:33,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:22:33,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:22:33,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:22:33,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:22:33,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:22:33,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:22:33,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:22:33,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:22:33,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:22:33,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:22:33,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:22:33,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:22:33,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:22:33,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:22:33,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:22:33,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:22:33,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:22:33,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:22:33,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:22:33,327 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:22:33,362 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:22:33,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:22:33,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:22:33,364 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:22:33,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:22:33,365 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:22:33,365 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:22:33,365 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:22:33,365 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:22:33,366 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:22:33,366 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:22:33,366 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:22:33,366 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:22:33,367 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:22:33,367 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:22:33,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:22:33,368 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:22:33,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:22:33,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:22:33,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:22:33,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:22:33,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:22:33,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:22:33,370 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:22:33,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:22:33,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:22:33,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:22:33,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:22:33,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:22:33,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:22:33,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:33,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:22:33,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:22:33,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:22:33,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:22:33,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:22:33,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:22:33,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:22:33,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:22:33,398 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_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 [2021-11-07 01:22:33,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:22:33,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:22:33,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:22:33,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:22:33,669 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:22:33,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-07 01:22:33,754 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/data/222ca1117/76a1e3ee357949f28c16c0ef2ff139c4/FLAGcc7681228 [2021-11-07 01:22:34,397 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:22:34,406 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-07 01:22:34,451 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/data/222ca1117/76a1e3ee357949f28c16c0ef2ff139c4/FLAGcc7681228 [2021-11-07 01:22:34,597 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/data/222ca1117/76a1e3ee357949f28c16c0ef2ff139c4 [2021-11-07 01:22:34,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:22:34,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:22:34,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:34,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:22:34,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:22:34,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:34" (1/1) ... [2021-11-07 01:22:34,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c67156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:34, skipping insertion in model container [2021-11-07 01:22:34,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:34" (1/1) ... [2021-11-07 01:22:34,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:22:34,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:35,185 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_c57bdc09-e6da-42f5-a1ea-f288f333a566/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-07 01:22:35,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:35,229 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) [2021-11-07 01:22:35,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@105fae9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:35, skipping insertion in model container [2021-11-07 01:22:35,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:35,230 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:22:35,232 INFO L168 Benchmark]: Toolchain (without parser) took 629.95 ms. Allocated memory is still 127.9 MB. Free memory was 102.4 MB in the beginning and 82.0 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:22:35,233 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory was 57.6 MB in the beginning and 57.5 MB in the end (delta: 36.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:22:35,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 627.27 ms. Allocated memory is still 127.9 MB. Free memory was 102.2 MB in the beginning and 82.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:22:35,241 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory was 57.6 MB in the beginning and 57.5 MB in the end (delta: 36.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 627.27 ms. Allocated memory is still 127.9 MB. Free memory was 102.2 MB in the beginning and 82.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * 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_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8 --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 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:22:37,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:22:37,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:22:37,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:22:37,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:22:37,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:22:37,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:22:37,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:22:37,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:22:37,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:22:37,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:22:37,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:22:37,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:22:37,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:22:37,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:22:37,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:22:37,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:22:37,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:22:37,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:22:37,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:22:37,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:22:37,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:22:37,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:22:37,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:22:37,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:22:37,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:22:37,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:22:37,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:22:37,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:22:37,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:22:37,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:22:37,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:22:37,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:22:37,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:22:37,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:22:37,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:22:37,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:22:37,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:22:37,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:22:37,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:22:37,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:22:37,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:22:37,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:22:37,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:22:37,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:22:37,815 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:22:37,815 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:22:37,816 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:22:37,816 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:22:37,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:22:37,816 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:22:37,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:22:37,817 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:22:37,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:22:37,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:22:37,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:22:37,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:22:37,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:22:37,819 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:22:37,819 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:22:37,819 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:22:37,819 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:22:37,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:22:37,820 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:22:37,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:22:37,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:22:37,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:22:37,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:22:37,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:37,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:22:37,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:22:37,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:22:37,822 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:22:37,822 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:37,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:22:37,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:22:37,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:22:37,824 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_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 [2021-11-07 01:22:38,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:22:38,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:22:38,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:22:38,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:22:38,262 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:22:38,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-07 01:22:38,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/data/32c28657c/dd2486b9575f482aaa3d22eb956dc64a/FLAGfbe148bf2 [2021-11-07 01:22:39,075 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:22:39,077 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-07 01:22:39,107 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/data/32c28657c/dd2486b9575f482aaa3d22eb956dc64a/FLAGfbe148bf2 [2021-11-07 01:22:39,251 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/data/32c28657c/dd2486b9575f482aaa3d22eb956dc64a [2021-11-07 01:22:39,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:22:39,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:22:39,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:39,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:22:39,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:22:39,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:39" (1/1) ... [2021-11-07 01:22:39,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b127e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:39, skipping insertion in model container [2021-11-07 01:22:39,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:39" (1/1) ... [2021-11-07 01:22:39,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:22:39,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:39,821 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_c57bdc09-e6da-42f5-a1ea-f288f333a566/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-07 01:22:39,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:39,857 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:22:39,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:40,033 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_c57bdc09-e6da-42f5-a1ea-f288f333a566/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-07 01:22:40,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:40,044 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:22:40,151 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_c57bdc09-e6da-42f5-a1ea-f288f333a566/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-07 01:22:40,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:40,186 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:22:40,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40 WrapperNode [2021-11-07 01:22:40,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:40,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:40,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:22:40,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:22:40,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (1/1) ... [2021-11-07 01:22:40,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (1/1) ... [2021-11-07 01:22:40,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:40,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:22:40,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:22:40,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:22:40,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (1/1) ... [2021-11-07 01:22:40,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (1/1) ... [2021-11-07 01:22:40,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (1/1) ... [2021-11-07 01:22:40,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (1/1) ... [2021-11-07 01:22:40,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (1/1) ... [2021-11-07 01:22:40,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (1/1) ... [2021-11-07 01:22:40,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (1/1) ... [2021-11-07 01:22:40,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:22:40,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:22:40,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:22:40,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:22:40,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (1/1) ... [2021-11-07 01:22:40,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:40,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:22:40,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:22:40,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:22:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:22:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:22:40,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:22:40,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:22:40,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:22:40,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:22:40,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:22:40,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:22:40,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:22:40,842 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:22:50,344 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 01:22:50,344 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 01:22:50,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:22:50,353 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:22:50,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:50 BoogieIcfgContainer [2021-11-07 01:22:50,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:22:50,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:22:50,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:22:50,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:22:50,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:22:39" (1/3) ... [2021-11-07 01:22:50,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101d0504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:50, skipping insertion in model container [2021-11-07 01:22:50,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:40" (2/3) ... [2021-11-07 01:22:50,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101d0504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:50, skipping insertion in model container [2021-11-07 01:22:50,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:50" (3/3) ... [2021-11-07 01:22:50,365 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.01.i.cil-1.c [2021-11-07 01:22:50,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:22:50,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:22:50,420 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:22:50,427 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 [2021-11-07 01:22:50,427 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:22:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:22:50,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:50,461 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:50,462 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1383952291, now seen corresponding path program 1 times [2021-11-07 01:22:50,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:50,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50720030] [2021-11-07 01:22:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:50,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:50,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:50,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:50,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:22:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:50,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:22:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:51,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:51,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:51,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50720030] [2021-11-07 01:22:51,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50720030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:51,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:51,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:22:51,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466563658] [2021-11-07 01:22:51,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:51,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:51,651 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 0 states have call successors, (0), 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 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:51,860 INFO L93 Difference]: Finished difference Result 553 states and 933 transitions. [2021-11-07 01:22:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:51,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 48 [2021-11-07 01:22:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:51,879 INFO L225 Difference]: With dead ends: 553 [2021-11-07 01:22:51,879 INFO L226 Difference]: Without dead ends: 377 [2021-11-07 01:22:51,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-07 01:22:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-11-07 01:22:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.5186170212765957) internal successors, (571), 376 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 571 transitions. [2021-11-07 01:22:51,952 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 571 transitions. Word has length 48 [2021-11-07 01:22:51,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:51,953 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 571 transitions. [2021-11-07 01:22:51,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 571 transitions. [2021-11-07 01:22:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:22:51,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:51,961 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:51,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:52,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:52,174 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash -511791490, now seen corresponding path program 1 times [2021-11-07 01:22:52,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:52,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281975748] [2021-11-07 01:22:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:52,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:52,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:52,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:52,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:22:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:52,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:22:52,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:53,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:53,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:53,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281975748] [2021-11-07 01:22:53,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281975748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:53,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:53,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:22:53,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392220650] [2021-11-07 01:22:53,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:53,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:53,595 INFO L87 Difference]: Start difference. First operand 377 states and 571 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 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) [2021-11-07 01:22:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:53,830 INFO L93 Difference]: Finished difference Result 860 states and 1312 transitions. [2021-11-07 01:22:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:53,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 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 108 [2021-11-07 01:22:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:53,838 INFO L225 Difference]: With dead ends: 860 [2021-11-07 01:22:53,838 INFO L226 Difference]: Without dead ends: 614 [2021-11-07 01:22:53,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-07 01:22:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-11-07 01:22:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.5154975530179446) internal successors, (929), 613 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 929 transitions. [2021-11-07 01:22:53,880 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 929 transitions. Word has length 108 [2021-11-07 01:22:53,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:53,881 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 929 transitions. [2021-11-07 01:22:53,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 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) [2021-11-07 01:22:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 929 transitions. [2021-11-07 01:22:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 01:22:53,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:53,888 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:53,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:54,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:54,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:54,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash -868750118, now seen corresponding path program 1 times [2021-11-07 01:22:54,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:54,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199681375] [2021-11-07 01:22:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:54,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:54,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:54,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:54,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:22:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:54,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:22:54,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 01:22:55,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 01:22:55,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:55,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199681375] [2021-11-07 01:22:55,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199681375] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:55,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:55,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:22:55,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788307127] [2021-11-07 01:22:55,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:55,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:55,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:55,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:55,900 INFO L87 Difference]: Start difference. First operand 614 states and 929 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:56,085 INFO L93 Difference]: Finished difference Result 1336 states and 2029 transitions. [2021-11-07 01:22:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:56,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 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 169 [2021-11-07 01:22:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:56,097 INFO L225 Difference]: With dead ends: 1336 [2021-11-07 01:22:56,097 INFO L226 Difference]: Without dead ends: 853 [2021-11-07 01:22:56,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:56,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-07 01:22:56,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2021-11-07 01:22:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.511737089201878) internal successors, (1288), 852 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1288 transitions. [2021-11-07 01:22:56,147 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1288 transitions. Word has length 169 [2021-11-07 01:22:56,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:56,150 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1288 transitions. [2021-11-07 01:22:56,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:56,152 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1288 transitions. [2021-11-07 01:22:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-07 01:22:56,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:56,160 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-07 01:22:56,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:56,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:56,371 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:56,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:56,372 INFO L85 PathProgramCache]: Analyzing trace with hash -438302228, now seen corresponding path program 1 times [2021-11-07 01:22:56,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:56,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749782501] [2021-11-07 01:22:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:56,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:56,375 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:56,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:22:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:57,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:22:57,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:57,309 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 [2021-11-07 01:22:57,322 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 [2021-11-07 01:22:57,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:57,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-07 01:22:57,430 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 169 treesize of output 158 [2021-11-07 01:22:57,940 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 01:22:57,941 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 469 treesize of output 441 [2021-11-07 01:22:58,013 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:58,016 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-07 01:22:58,030 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 169 treesize of output 158 [2021-11-07 01:22:58,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,166 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 77 treesize of output 49 [2021-11-07 01:22:58,303 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:22:58,303 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 [2021-11-07 01:22:58,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:58,352 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 [2021-11-07 01:22:58,389 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 [2021-11-07 01:22:58,394 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 [2021-11-07 01:22:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-07 01:22:59,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:59,976 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:59,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 01:22:59,984 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:59,987 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 01:23:00,156 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:23:00,164 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-11-07 01:23:00,172 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:23:00,176 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 404 [2021-11-07 01:23:00,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:23:00,213 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 461 [2021-11-07 01:23:00,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:23:00,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 578 [2021-11-07 01:23:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-07 01:23:00,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:00,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749782501] [2021-11-07 01:23:00,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749782501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:00,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:00,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:23:00,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401984793] [2021-11-07 01:23:00,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:23:00,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:00,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:23:00,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:23:00,573 INFO L87 Difference]: Start difference. First operand 853 states and 1288 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:19,876 INFO L93 Difference]: Finished difference Result 1703 states and 2572 transitions. [2021-11-07 01:23:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:23:19,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 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 210 [2021-11-07 01:23:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:19,892 INFO L225 Difference]: With dead ends: 1703 [2021-11-07 01:23:19,893 INFO L226 Difference]: Without dead ends: 853 [2021-11-07 01:23:19,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:23:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-07 01:23:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2021-11-07 01:23:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.5105633802816902) internal successors, (1287), 852 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1287 transitions. [2021-11-07 01:23:19,926 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1287 transitions. Word has length 210 [2021-11-07 01:23:19,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:19,926 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1287 transitions. [2021-11-07 01:23:19,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1287 transitions. [2021-11-07 01:23:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-07 01:23:19,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:19,932 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-07 01:23:19,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:20,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:20,142 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1311967830, now seen corresponding path program 1 times [2021-11-07 01:23:20,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:20,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489830234] [2021-11-07 01:23:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:20,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:20,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:20,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:20,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:23:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:21,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:23:21,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:21,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:21,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:21,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:21,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:21,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:21,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:21,661 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-07 01:23:21,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-07 01:23:21,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:21,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:21,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:22,088 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:23:22,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-07 01:23:23,657 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:23:23,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-07 01:23:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-07 01:23:24,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-07 01:23:25,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:25,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489830234] [2021-11-07 01:23:25,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489830234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:25,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:25,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-07 01:23:25,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983343479] [2021-11-07 01:23:25,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:23:25,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:23:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:23:25,354 INFO L87 Difference]: Start difference. First operand 853 states and 1287 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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) [2021-11-07 01:23:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:39,315 INFO L93 Difference]: Finished difference Result 2002 states and 3019 transitions. [2021-11-07 01:23:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:23:39,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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 210 [2021-11-07 01:23:39,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:39,326 INFO L225 Difference]: With dead ends: 2002 [2021-11-07 01:23:39,326 INFO L226 Difference]: Without dead ends: 1159 [2021-11-07 01:23:39,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 412 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:23:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-11-07 01:23:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1003. [2021-11-07 01:23:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.5419161676646707) internal successors, (1545), 1002 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:39,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1545 transitions. [2021-11-07 01:23:39,383 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1545 transitions. Word has length 210 [2021-11-07 01:23:39,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:39,384 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1545 transitions. [2021-11-07 01:23:39,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 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) [2021-11-07 01:23:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1545 transitions. [2021-11-07 01:23:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-07 01:23:39,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:39,389 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-07 01:23:39,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:39,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:39,609 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:39,609 INFO L85 PathProgramCache]: Analyzing trace with hash 95758120, now seen corresponding path program 1 times [2021-11-07 01:23:39,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:39,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874955500] [2021-11-07 01:23:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:39,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:39,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:39,613 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:39,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:23:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:40,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:23:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:41,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:41,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:41,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:41,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:41,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:41,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:41,581 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-07 01:23:41,582 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 76 [2021-11-07 01:23:44,213 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:23:44,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-07 01:23:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-07 01:23:44,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-07 01:23:45,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:45,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874955500] [2021-11-07 01:23:45,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874955500] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:45,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:45,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:23:45,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859953187] [2021-11-07 01:23:45,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:23:45,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:45,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:23:45,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:23:45,398 INFO L87 Difference]: Start difference. First operand 1003 states and 1545 transitions. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:13,829 INFO L93 Difference]: Finished difference Result 3404 states and 5227 transitions. [2021-11-07 01:24:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:24:13,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 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 210 [2021-11-07 01:24:13,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:13,846 INFO L225 Difference]: With dead ends: 3404 [2021-11-07 01:24:13,846 INFO L226 Difference]: Without dead ends: 2411 [2021-11-07 01:24:13,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:24:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-11-07 01:24:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1282. [2021-11-07 01:24:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.604215456674473) internal successors, (2055), 1281 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 2055 transitions. [2021-11-07 01:24:13,929 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 2055 transitions. Word has length 210 [2021-11-07 01:24:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:13,929 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 2055 transitions. [2021-11-07 01:24:13,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 2055 transitions. [2021-11-07 01:24:13,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-07 01:24:13,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:13,934 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-07 01:24:13,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:14,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:14,150 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:14,150 INFO L85 PathProgramCache]: Analyzing trace with hash -149215637, now seen corresponding path program 1 times [2021-11-07 01:24:14,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:14,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015364054] [2021-11-07 01:24:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:14,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:14,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:14,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:14,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:24:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:15,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:24:15,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:15,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:15,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:15,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:15,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:15,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:15,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:15,979 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-07 01:24:15,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-07 01:24:18,103 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:24:18,103 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 109 treesize of output 37 [2021-11-07 01:24:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-07 01:24:18,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-07 01:24:19,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:19,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015364054] [2021-11-07 01:24:19,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015364054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:19,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:19,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:19,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467073868] [2021-11-07 01:24:19,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:19,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:19,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:19,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:19,037 INFO L87 Difference]: Start difference. First operand 1282 states and 2055 transitions. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:49,900 INFO L93 Difference]: Finished difference Result 3934 states and 6207 transitions. [2021-11-07 01:24:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:24:49,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 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 211 [2021-11-07 01:24:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:49,918 INFO L225 Difference]: With dead ends: 3934 [2021-11-07 01:24:49,918 INFO L226 Difference]: Without dead ends: 2662 [2021-11-07 01:24:49,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:24:49,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-11-07 01:24:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1562. [2021-11-07 01:24:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 1.6483023702754644) internal successors, (2573), 1561 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2573 transitions. [2021-11-07 01:24:50,058 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2573 transitions. Word has length 211 [2021-11-07 01:24:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:50,058 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 2573 transitions. [2021-11-07 01:24:50,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2573 transitions. [2021-11-07 01:24:50,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-07 01:24:50,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:50,065 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-11-07 01:24:50,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:24:50,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:50,286 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:50,287 INFO L85 PathProgramCache]: Analyzing trace with hash 613541115, now seen corresponding path program 1 times [2021-11-07 01:24:50,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:50,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929046276] [2021-11-07 01:24:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:50,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:50,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:50,289 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:50,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:24:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:24:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:52,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:52,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:52,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:52,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:52,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:52,418 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-07 01:24:52,418 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 76 [2021-11-07 01:24:54,161 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:24:54,161 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 109 treesize of output 37 [2021-11-07 01:24:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-07 01:24:54,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-07 01:24:55,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:55,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929046276] [2021-11-07 01:24:55,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929046276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:55,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:55,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:55,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982087908] [2021-11-07 01:24:55,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:55,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:55,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:55,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:55,264 INFO L87 Difference]: Start difference. First operand 1562 states and 2573 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:32,245 INFO L93 Difference]: Finished difference Result 4494 states and 7223 transitions. [2021-11-07 01:25:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:25:32,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 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 237 [2021-11-07 01:25:32,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:32,264 INFO L225 Difference]: With dead ends: 4494 [2021-11-07 01:25:32,265 INFO L226 Difference]: Without dead ends: 2942 [2021-11-07 01:25:32,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-11-07 01:25:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1772. [2021-11-07 01:25:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 1.6623376623376624) internal successors, (2944), 1771 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2944 transitions. [2021-11-07 01:25:32,381 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2944 transitions. Word has length 237 [2021-11-07 01:25:32,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:32,381 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2944 transitions. [2021-11-07 01:25:32,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:32,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2944 transitions. [2021-11-07 01:25:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-07 01:25:32,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:32,388 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-11-07 01:25:32,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:32,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:32,602 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:32,602 INFO L85 PathProgramCache]: Analyzing trace with hash 840638525, now seen corresponding path program 1 times [2021-11-07 01:25:32,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:32,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73933609] [2021-11-07 01:25:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:32,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:32,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:32,604 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:32,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:25:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:34,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:25:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:34,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:34,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:34,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:34,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:34,935 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-07 01:25:34,935 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 76 [2021-11-07 01:25:36,811 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:25:36,811 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 109 treesize of output 37 [2021-11-07 01:25:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-07 01:25:37,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-07 01:25:37,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:37,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73933609] [2021-11-07 01:25:37,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73933609] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:37,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:37,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:37,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659996988] [2021-11-07 01:25:37,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:37,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:37,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:37,954 INFO L87 Difference]: Start difference. First operand 1772 states and 2944 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:14,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:14,647 INFO L93 Difference]: Finished difference Result 4622 states and 7436 transitions. [2021-11-07 01:26:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:26:14,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 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 238 [2021-11-07 01:26:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:14,666 INFO L225 Difference]: With dead ends: 4622 [2021-11-07 01:26:14,666 INFO L226 Difference]: Without dead ends: 2860 [2021-11-07 01:26:14,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:26:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-11-07 01:26:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1772. [2021-11-07 01:26:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 1.6544325239977413) internal successors, (2930), 1771 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2930 transitions. [2021-11-07 01:26:14,786 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2930 transitions. Word has length 238 [2021-11-07 01:26:14,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:14,787 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2930 transitions. [2021-11-07 01:26:14,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:14,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2930 transitions. [2021-11-07 01:26:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-07 01:26:14,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:14,794 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-07 01:26:14,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:15,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:15,010 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:15,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash -299491700, now seen corresponding path program 1 times [2021-11-07 01:26:15,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:15,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596771016] [2021-11-07 01:26:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:15,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:15,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:15,013 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:15,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:26:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:16,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:16,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:16,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:16,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:16,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:16,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:16,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:16,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:17,364 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-07 01:26:17,365 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 76 [2021-11-07 01:26:19,197 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:26:19,197 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 109 treesize of output 37 [2021-11-07 01:26:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-07 01:26:19,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-07 01:26:20,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:20,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596771016] [2021-11-07 01:26:20,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596771016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:20,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:20,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:26:20,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648077209] [2021-11-07 01:26:20,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:26:20,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:20,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:26:20,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:26:20,368 INFO L87 Difference]: Start difference. First operand 1772 states and 2930 transitions. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:50,148 INFO L93 Difference]: Finished difference Result 5039 states and 8198 transitions. [2021-11-07 01:26:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:26:50,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 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 240 [2021-11-07 01:26:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:50,167 INFO L225 Difference]: With dead ends: 5039 [2021-11-07 01:26:50,167 INFO L226 Difference]: Without dead ends: 3277 [2021-11-07 01:26:50,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:26:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2021-11-07 01:26:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 2220. [2021-11-07 01:26:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 1.6737269040108156) internal successors, (3714), 2219 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3714 transitions. [2021-11-07 01:26:50,309 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3714 transitions. Word has length 240 [2021-11-07 01:26:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:50,310 INFO L470 AbstractCegarLoop]: Abstraction has 2220 states and 3714 transitions. [2021-11-07 01:26:50,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3714 transitions. [2021-11-07 01:26:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-07 01:26:50,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:50,318 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-07 01:26:50,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:50,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:50,531 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:50,532 INFO L85 PathProgramCache]: Analyzing trace with hash -961340692, now seen corresponding path program 1 times [2021-11-07 01:26:50,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:50,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182591985] [2021-11-07 01:26:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:50,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:50,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:50,535 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:50,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:26:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:52,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:52,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:52,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:52,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:52,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:52,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:52,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:53,036 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-07 01:26:53,037 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 76 [2021-11-07 01:26:55,143 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:26:55,144 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 109 treesize of output 37 [2021-11-07 01:26:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-07 01:26:55,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-07 01:26:56,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:56,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182591985] [2021-11-07 01:26:56,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182591985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:56,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:56,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:26:56,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783381968] [2021-11-07 01:26:56,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:26:56,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:56,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:26:56,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:26:56,317 INFO L87 Difference]: Start difference. First operand 2220 states and 3714 transitions. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:34,113 INFO L93 Difference]: Finished difference Result 5774 states and 9424 transitions. [2021-11-07 01:27:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:27:34,115 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 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 244 [2021-11-07 01:27:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:34,129 INFO L225 Difference]: With dead ends: 5774 [2021-11-07 01:27:34,129 INFO L226 Difference]: Without dead ends: 3564 [2021-11-07 01:27:34,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-11-07 01:27:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2479. [2021-11-07 01:27:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2478 states have (on average 1.6795803066989508) internal successors, (4162), 2478 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 4162 transitions. [2021-11-07 01:27:34,316 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 4162 transitions. Word has length 244 [2021-11-07 01:27:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:34,316 INFO L470 AbstractCegarLoop]: Abstraction has 2479 states and 4162 transitions. [2021-11-07 01:27:34,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 4162 transitions. [2021-11-07 01:27:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-07 01:27:34,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:34,323 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-07 01:27:34,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:34,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:34,553 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash 434387151, now seen corresponding path program 1 times [2021-11-07 01:27:34,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:34,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023901289] [2021-11-07 01:27:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:34,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:34,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:34,555 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:34,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:27:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:36,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:27:36,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:36,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:36,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:36,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:36,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:36,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:36,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:37,096 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-07 01:27:37,096 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 76 [2021-11-07 01:27:39,374 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:27:39,375 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 109 treesize of output 37 [2021-11-07 01:27:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 350 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-07 01:27:39,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 350 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-07 01:27:40,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:40,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023901289] [2021-11-07 01:27:40,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023901289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:40,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:40,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:27:40,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187581669] [2021-11-07 01:27:40,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:40,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:40,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:40,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:40,571 INFO L87 Difference]: Start difference. First operand 2479 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 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) [2021-11-07 01:28:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:12,823 INFO L93 Difference]: Finished difference Result 6000 states and 9812 transitions. [2021-11-07 01:28:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:28:12,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 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 245 [2021-11-07 01:28:12,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:12,842 INFO L225 Difference]: With dead ends: 6000 [2021-11-07 01:28:12,842 INFO L226 Difference]: Without dead ends: 3531 [2021-11-07 01:28:12,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:28:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2021-11-07 01:28:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 2479. [2021-11-07 01:28:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2478 states have (on average 1.6739305891848264) internal successors, (4148), 2478 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 4148 transitions. [2021-11-07 01:28:13,001 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 4148 transitions. Word has length 245 [2021-11-07 01:28:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 2479 states and 4148 transitions. [2021-11-07 01:28:13,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 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) [2021-11-07 01:28:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 4148 transitions. [2021-11-07 01:28:13,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-07 01:28:13,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:13,008 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-07 01:28:13,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:13,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:13,230 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:13,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1190000932, now seen corresponding path program 1 times [2021-11-07 01:28:13,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:13,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399145475] [2021-11-07 01:28:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:13,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:13,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:13,232 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:13,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:28:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:16,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:28:16,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:16,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:16,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:16,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:16,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:16,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:16,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:16,561 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-07 01:28:16,561 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 76 [2021-11-07 01:28:17,369 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:28:17,370 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 109 treesize of output 37 [2021-11-07 01:28:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-07 01:28:17,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-07 01:28:18,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:18,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399145475] [2021-11-07 01:28:18,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399145475] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:18,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:18,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:28:18,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254677433] [2021-11-07 01:28:18,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:28:18,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:18,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:28:18,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:28:18,627 INFO L87 Difference]: Start difference. First operand 2479 states and 4148 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) [2021-11-07 01:28:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:57,376 INFO L93 Difference]: Finished difference Result 6280 states and 10254 transitions. [2021-11-07 01:28:57,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:28:57,378 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 253 [2021-11-07 01:28:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:57,390 INFO L225 Difference]: With dead ends: 6280 [2021-11-07 01:28:57,391 INFO L226 Difference]: Without dead ends: 3811 [2021-11-07 01:28:57,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:28:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2021-11-07 01:28:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 2591. [2021-11-07 01:28:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2590 states have (on average 1.655984555984556) internal successors, (4289), 2590 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 4289 transitions. [2021-11-07 01:28:57,570 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 4289 transitions. Word has length 253 [2021-11-07 01:28:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:57,571 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 4289 transitions. [2021-11-07 01:28:57,571 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) [2021-11-07 01:28:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 4289 transitions. [2021-11-07 01:28:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-07 01:28:57,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:57,578 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:57,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:57,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:57,791 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:57,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2046774459, now seen corresponding path program 1 times [2021-11-07 01:28:57,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:57,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485841983] [2021-11-07 01:28:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:57,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:57,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:57,794 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:57,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:29:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:29:00,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:00,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:00,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:00,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:00,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:00,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:00,872 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-07 01:29:00,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-07 01:29:00,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:00,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:00,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:01,368 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:29:01,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-07 01:29:03,862 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:29:03,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-07 01:29:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-07 01:29:04,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-07 01:29:04,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:04,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485841983] [2021-11-07 01:29:04,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485841983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:04,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:04,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:29:04,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174280988] [2021-11-07 01:29:04,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:29:04,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:29:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:29:04,801 INFO L87 Difference]: Start difference. First operand 2591 states and 4289 transitions. Second operand has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:51,999 INFO L93 Difference]: Finished difference Result 7103 states and 11392 transitions. [2021-11-07 01:29:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:29:52,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 0 states have call successors, (0), 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 254 [2021-11-07 01:29:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:52,012 INFO L225 Difference]: With dead ends: 7103 [2021-11-07 01:29:52,012 INFO L226 Difference]: Without dead ends: 4522 [2021-11-07 01:29:52,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 500 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:29:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2021-11-07 01:29:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 2852. [2021-11-07 01:29:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 1.6576639775517363) internal successors, (4726), 2851 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 4726 transitions. [2021-11-07 01:29:52,173 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 4726 transitions. Word has length 254 [2021-11-07 01:29:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:52,174 INFO L470 AbstractCegarLoop]: Abstraction has 2852 states and 4726 transitions. [2021-11-07 01:29:52,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 4726 transitions. [2021-11-07 01:29:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-07 01:29:52,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:52,183 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-11-07 01:29:52,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:52,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:52,406 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:52,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1562207625, now seen corresponding path program 1 times [2021-11-07 01:29:52,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:52,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222001387] [2021-11-07 01:29:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:52,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:52,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:52,408 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:52,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:29:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:54,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:29:54,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:55,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:55,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:55,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:55,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:55,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:55,344 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-07 01:29:55,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-07 01:29:55,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:55,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:55,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:55,766 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:29:55,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-07 01:29:58,370 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:29:58,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-07 01:29:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-07 01:29:58,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-07 01:29:59,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:59,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222001387] [2021-11-07 01:29:59,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222001387] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:59,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:59,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:29:59,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696767282] [2021-11-07 01:29:59,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:29:59,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:59,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:29:59,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:29:59,271 INFO L87 Difference]: Start difference. First operand 2852 states and 4726 transitions. Second operand has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:42,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:42,567 INFO L93 Difference]: Finished difference Result 7326 states and 11787 transitions. [2021-11-07 01:30:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:30:42,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 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 256 [2021-11-07 01:30:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:42,576 INFO L225 Difference]: With dead ends: 7326 [2021-11-07 01:30:42,576 INFO L226 Difference]: Without dead ends: 4444 [2021-11-07 01:30:42,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 504 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:30:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2021-11-07 01:30:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 2863. [2021-11-07 01:30:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 1.6568832983927324) internal successors, (4742), 2862 states have internal predecessors, (4742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4742 transitions. [2021-11-07 01:30:42,731 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4742 transitions. Word has length 256 [2021-11-07 01:30:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:42,732 INFO L470 AbstractCegarLoop]: Abstraction has 2863 states and 4742 transitions. [2021-11-07 01:30:42,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4742 transitions. [2021-11-07 01:30:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-07 01:30:42,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:42,740 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:42,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:42,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:42,963 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:42,963 INFO L85 PathProgramCache]: Analyzing trace with hash -673578675, now seen corresponding path program 1 times [2021-11-07 01:30:42,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:42,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349090865] [2021-11-07 01:30:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:42,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:42,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:42,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:42,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:30:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:46,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:30:46,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:46,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:46,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:46,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:30:46,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:30:46,694 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-07 01:30:46,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-07 01:30:46,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:30:46,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:30:46,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:30:47,086 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:30:47,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-07 01:30:49,472 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:30:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-07 01:30:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 627 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-11-07 01:30:49,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 627 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-11-07 01:30:50,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:50,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349090865] [2021-11-07 01:30:50,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349090865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:50,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:50,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:30:50,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5141285] [2021-11-07 01:30:50,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:30:50,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:50,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:30:50,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:50,782 INFO L87 Difference]: Start difference. First operand 2863 states and 4742 transitions. Second operand has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:35,687 INFO L93 Difference]: Finished difference Result 7591 states and 12227 transitions. [2021-11-07 01:31:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:31:35,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 0 states have call successors, (0), 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 325 [2021-11-07 01:31:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:35,697 INFO L225 Difference]: With dead ends: 7591 [2021-11-07 01:31:35,698 INFO L226 Difference]: Without dead ends: 4738 [2021-11-07 01:31:35,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 642 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:31:35,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2021-11-07 01:31:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 3156. [2021-11-07 01:31:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 1.6538827258320126) internal successors, (5218), 3155 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 5218 transitions. [2021-11-07 01:31:35,886 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 5218 transitions. Word has length 325 [2021-11-07 01:31:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:35,887 INFO L470 AbstractCegarLoop]: Abstraction has 3156 states and 5218 transitions. [2021-11-07 01:31:35,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 5218 transitions. [2021-11-07 01:31:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-07 01:31:35,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:35,898 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:35,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:36,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:36,102 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:36,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1426159755, now seen corresponding path program 1 times [2021-11-07 01:31:36,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:36,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788680525] [2021-11-07 01:31:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:36,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:36,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:36,104 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:36,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c57bdc09-e6da-42f5-a1ea-f288f333a566/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:31:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:44,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:31:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:44,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:44,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:44,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:44,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:44,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:44,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:44,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:44,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:44,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:44,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 41 [2021-11-07 01:31:45,071 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 143 treesize of output 131 [2021-11-07 01:31:45,078 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 131 treesize of output 107 [2021-11-07 01:31:45,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:45,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:45,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:46,594 INFO L354 Elim1Store]: treesize reduction 1579, result has 17.5 percent of original size [2021-11-07 01:31:46,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 107 treesize of output 371 [2021-11-07 01:32:05,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:05,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:05,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:05,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:05,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:06,344 INFO L354 Elim1Store]: treesize reduction 1322, result has 7.7 percent of original size [2021-11-07 01:32:06,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 70 case distinctions, treesize of input 391 treesize of output 509 [2021-11-07 01:33:00,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:33:00,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 105 treesize of output 41 [2021-11-07 01:33:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 624 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-07 01:33:05,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:08,872 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 589 treesize of output 493 [2021-11-07 01:33:08,878 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 493 treesize of output 301