./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.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_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/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_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/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_7e757416-b650-47ed-8fb6-ab5c9202b436/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 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:40:01,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:40:01,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:40:01,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:40:01,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:40:01,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:40:01,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:40:01,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:40:01,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:40:01,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:40:01,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:40:01,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:40:01,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:40:01,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:40:01,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:40:01,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:40:01,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:40:01,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:40:01,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:40:01,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:40:01,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:40:01,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:40:01,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:40:01,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:40:01,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:40:01,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:40:01,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:40:01,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:40:01,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:40:01,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:40:01,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:40:01,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:40:01,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:40:01,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:40:01,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:40:01,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:40:01,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:40:01,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:40:01,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:40:01,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:40:01,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:40:01,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:40:01,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:40:01,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:40:01,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:40:01,536 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:40:01,537 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:40:01,537 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:40:01,537 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:40:01,537 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:40:01,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:40:01,544 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:40:01,545 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:40:01,545 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:40:01,545 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:40:01,546 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:40:01,546 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:40:01,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:40:01,547 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:40:01,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:40:01,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:40:01,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:40:01,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:40:01,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:40:01,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:40:01,548 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:40:01,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:40:01,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:40:01,549 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:40:01,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:40:01,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:40:01,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:40:01,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:01,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:40:01,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:40:01,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:40:01,552 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:40:01,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:40:01,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:40:01,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:40:01,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:40:01,553 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_7e757416-b650-47ed-8fb6-ab5c9202b436/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af [2021-11-07 01:40:01,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:40:01,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:40:01,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:40:01,828 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:40:01,828 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:40:01,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-07 01:40:01,893 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/data/7a15d7795/a2b3f27dd3ad415ea85e919b870317bc/FLAGc9812ad74 [2021-11-07 01:40:02,494 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:40:02,495 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-07 01:40:02,518 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/data/7a15d7795/a2b3f27dd3ad415ea85e919b870317bc/FLAGc9812ad74 [2021-11-07 01:40:02,722 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/data/7a15d7795/a2b3f27dd3ad415ea85e919b870317bc [2021-11-07 01:40:02,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:40:02,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:40:02,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:02,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:40:02,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:40:02,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:02" (1/1) ... [2021-11-07 01:40:02,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37606d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:02, skipping insertion in model container [2021-11-07 01:40:02,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:02" (1/1) ... [2021-11-07 01:40:02,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:40:02,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:40:03,246 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_7e757416-b650-47ed-8fb6-ab5c9202b436/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-07 01:40:03,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:03,274 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 01:40:03,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b10cc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:03, skipping insertion in model container [2021-11-07 01:40:03,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:03,275 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:40:03,277 INFO L168 Benchmark]: Toolchain (without parser) took 550.31 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 50.7 MB in the beginning and 78.3 MB in the end (delta: -27.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:40:03,278 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 90.2 MB. Free memory is still 69.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:40:03,279 INFO L168 Benchmark]: CACSL2BoogieTranslator took 543.25 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 50.5 MB in the beginning and 78.3 MB in the end (delta: -27.9 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:40:03,281 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 90.2 MB. Free memory is still 69.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 543.25 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 50.5 MB in the beginning and 78.3 MB in the end (delta: -27.9 MB). Peak memory consumption was 6.6 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_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/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_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/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_7e757416-b650-47ed-8fb6-ab5c9202b436/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 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:40:05,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:40:05,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:40:05,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:40:05,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:40:05,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:40:05,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:40:05,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:40:05,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:40:05,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:40:05,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:40:05,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:40:05,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:40:05,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:40:05,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:40:05,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:40:05,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:40:05,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:40:05,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:40:05,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:40:05,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:40:05,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:40:05,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:40:05,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:40:05,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:40:05,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:40:05,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:40:05,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:40:05,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:40:05,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:40:05,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:40:05,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:40:05,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:40:05,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:40:05,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:40:05,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:40:05,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:40:05,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:40:05,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:40:05,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:40:05,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:40:05,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:40:05,643 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:40:05,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:40:05,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:40:05,645 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:40:05,645 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:40:05,646 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:40:05,646 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:40:05,646 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:40:05,646 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:40:05,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:40:05,648 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:40:05,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:40:05,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:40:05,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:40:05,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:40:05,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:40:05,649 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:40:05,650 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:40:05,650 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:40:05,650 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:40:05,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:40:05,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:40:05,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:40:05,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:40:05,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:40:05,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:40:05,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:05,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:40:05,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:40:05,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:40:05,652 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:40:05,652 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:05,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:40:05,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:40:05,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:40:05,653 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_7e757416-b650-47ed-8fb6-ab5c9202b436/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af [2021-11-07 01:40:06,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:40:06,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:40:06,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:40:06,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:40:06,038 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:40:06,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-07 01:40:06,121 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/data/e21f26083/6839bf3fde7448709e3ade7dca66e19c/FLAG20a21e0b5 [2021-11-07 01:40:06,858 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:40:06,859 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-07 01:40:06,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/data/e21f26083/6839bf3fde7448709e3ade7dca66e19c/FLAG20a21e0b5 [2021-11-07 01:40:07,126 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/data/e21f26083/6839bf3fde7448709e3ade7dca66e19c [2021-11-07 01:40:07,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:40:07,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:40:07,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:07,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:40:07,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:40:07,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:07" (1/1) ... [2021-11-07 01:40:07,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2afa83f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07, skipping insertion in model container [2021-11-07 01:40:07,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:07" (1/1) ... [2021-11-07 01:40:07,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:40:07,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:40:07,883 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_7e757416-b650-47ed-8fb6-ab5c9202b436/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-07 01:40:07,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:07,927 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:40:07,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:40:08,074 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_7e757416-b650-47ed-8fb6-ab5c9202b436/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-07 01:40:08,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:08,095 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:40:08,225 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_7e757416-b650-47ed-8fb6-ab5c9202b436/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-07 01:40:08,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:08,247 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:40:08,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08 WrapperNode [2021-11-07 01:40:08,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:08,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:40:08,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:40:08,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:40:08,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (1/1) ... [2021-11-07 01:40:08,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (1/1) ... [2021-11-07 01:40:08,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:40:08,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:40:08,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:40:08,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:40:08,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (1/1) ... [2021-11-07 01:40:08,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (1/1) ... [2021-11-07 01:40:08,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (1/1) ... [2021-11-07 01:40:08,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (1/1) ... [2021-11-07 01:40:08,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (1/1) ... [2021-11-07 01:40:08,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (1/1) ... [2021-11-07 01:40:08,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (1/1) ... [2021-11-07 01:40:08,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:40:08,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:40:08,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:40:08,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:40:08,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (1/1) ... [2021-11-07 01:40:08,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:08,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:08,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:40:08,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:40:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:40:08,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:40:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:40:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:40:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:40:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:40:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:40:08,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:40:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:40:08,873 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:40:18,321 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 01:40:18,322 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 01:40:18,329 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:40:18,330 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:40:18,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:18 BoogieIcfgContainer [2021-11-07 01:40:18,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:40:18,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:40:18,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:40:18,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:40:18,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:40:07" (1/3) ... [2021-11-07 01:40:18,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c652bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:18, skipping insertion in model container [2021-11-07 01:40:18,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:08" (2/3) ... [2021-11-07 01:40:18,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c652bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:18, skipping insertion in model container [2021-11-07 01:40:18,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:18" (3/3) ... [2021-11-07 01:40:18,339 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.09.i.cil-1.c [2021-11-07 01:40:18,344 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:40:18,345 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:40:18,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:40:18,395 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 01:40:18,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:40:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:40:18,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:18,422 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] [2021-11-07 01:40:18,422 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-07 01:40:18,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:18,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073411697] [2021-11-07 01:40:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:18,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:18,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:18,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:18,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:40:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:18,946 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 01:40:18,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:19,162 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 01:40:19,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:19,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073411697] [2021-11-07 01:40:19,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073411697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:19,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:19,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:19,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890465480] [2021-11-07 01:40:19,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:19,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:19,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:19,185 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:19,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:19,360 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-07 01:40:19,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:19,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 01:40:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:19,383 INFO L225 Difference]: With dead ends: 566 [2021-11-07 01:40:19,384 INFO L226 Difference]: Without dead ends: 387 [2021-11-07 01:40:19,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-07 01:40:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-07 01:40:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-07 01:40:19,478 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-07 01:40:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:19,479 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-07 01:40:19,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-07 01:40:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:40:19,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:19,483 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:19,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:19,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:19,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:19,685 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-11-07 01:40:19,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:19,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339273106] [2021-11-07 01:40:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:19,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:19,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:19,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:19,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:40:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:19,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:19,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:20,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:20,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:20,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339273106] [2021-11-07 01:40:20,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339273106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:20,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:20,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:20,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816646252] [2021-11-07 01:40:20,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:20,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:20,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:20,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:20,458 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:21,107 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-07 01:40:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:21,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:40:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:21,112 INFO L225 Difference]: With dead ends: 882 [2021-11-07 01:40:21,113 INFO L226 Difference]: Without dead ends: 631 [2021-11-07 01:40:21,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-07 01:40:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-07 01:40:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5222929936305734) internal successors, (956), 628 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-07 01:40:21,145 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-07 01:40:21,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:21,146 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-07 01:40:21,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-07 01:40:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:40:21,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:21,162 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:21,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:21,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:21,379 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:21,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1546935351, now seen corresponding path program 1 times [2021-11-07 01:40:21,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:21,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187020089] [2021-11-07 01:40:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:21,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:21,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:21,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:21,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:40:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:21,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:21,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:40:22,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:40:22,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:22,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187020089] [2021-11-07 01:40:22,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187020089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:22,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:22,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:22,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373919177] [2021-11-07 01:40:22,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:22,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:22,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:22,690 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 01:40:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:23,283 INFO L93 Difference]: Finished difference Result 1368 states and 2093 transitions. [2021-11-07 01:40:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:23,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 121 [2021-11-07 01:40:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:23,290 INFO L225 Difference]: With dead ends: 1368 [2021-11-07 01:40:23,290 INFO L226 Difference]: Without dead ends: 873 [2021-11-07 01:40:23,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 01:40:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-11-07 01:40:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2021-11-07 01:40:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.518348623853211) internal successors, (1324), 872 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states 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 01:40:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1324 transitions. [2021-11-07 01:40:23,348 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1324 transitions. Word has length 121 [2021-11-07 01:40:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:23,348 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1324 transitions. [2021-11-07 01:40:23,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 01:40:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1324 transitions. [2021-11-07 01:40:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 01:40:23,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:23,354 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:23,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:23,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:23,569 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1117044971, now seen corresponding path program 1 times [2021-11-07 01:40:23,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:23,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810392801] [2021-11-07 01:40:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:23,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:23,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:23,573 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:23,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:40:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:24,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 01:40:24,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 01:40:25,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:25,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810392801] [2021-11-07 01:40:25,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810392801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:25,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:25,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:25,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155600928] [2021-11-07 01:40:25,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:25,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:25,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:25,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:25,060 INFO L87 Difference]: Start difference. First operand 873 states and 1324 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 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 01:40:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:25,710 INFO L93 Difference]: Finished difference Result 1860 states and 2832 transitions. [2021-11-07 01:40:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 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 150 [2021-11-07 01:40:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:25,718 INFO L225 Difference]: With dead ends: 1860 [2021-11-07 01:40:25,718 INFO L226 Difference]: Without dead ends: 1121 [2021-11-07 01:40:25,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 296 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 01:40:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-07 01:40:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1121. [2021-11-07 01:40:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.5133928571428572) internal successors, (1695), 1120 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states 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 01:40:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1695 transitions. [2021-11-07 01:40:25,776 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1695 transitions. Word has length 150 [2021-11-07 01:40:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:25,777 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1695 transitions. [2021-11-07 01:40:25,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 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 01:40:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1695 transitions. [2021-11-07 01:40:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 01:40:25,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:25,781 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:25,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:40:25,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:25,996 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:25,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2092203957, now seen corresponding path program 1 times [2021-11-07 01:40:25,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:25,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107739575] [2021-11-07 01:40:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:25,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:25,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:26,000 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:26,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:40:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:26,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:40:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:27,052 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 01:40:27,064 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 01:40:27,173 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:27,178 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:40:27,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:27,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 01:40:27,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-07 01:40:27,713 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 01:40:27,714 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 717 treesize of output 669 [2021-11-07 01:40:27,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:27,764 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:40:27,770 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:27,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 01:40:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-07 01:40:27,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:27,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-07 01:40:28,053 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:40:28,053 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 01:40:28,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:28,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:28,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:28,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:28,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:28,086 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 01:40:28,121 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 01:40:28,126 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 01:40:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-07 01:40:28,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:29,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:29,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 01:40:29,230 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:29,233 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 01:40:29,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:29,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-07 01:40:29,381 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:29,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-07 01:40:29,394 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:29,400 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-07 01:40:29,434 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:29,437 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-07 01:40:29,454 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:29,458 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-07 01:40:29,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:29,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-07 01:40:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-07 01:40:29,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:29,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107739575] [2021-11-07 01:40:29,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107739575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:29,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:29,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:40:29,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757646396] [2021-11-07 01:40:29,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:40:29,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:40:29,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:40:29,982 INFO L87 Difference]: Start difference. First operand 1121 states and 1695 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:44,733 INFO L93 Difference]: Finished difference Result 2239 states and 3386 transitions. [2021-11-07 01:40:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:40:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-07 01:40:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:44,743 INFO L225 Difference]: With dead ends: 2239 [2021-11-07 01:40:44,744 INFO L226 Difference]: Without dead ends: 1121 [2021-11-07 01:40:44,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 339 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 01:40:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-07 01:40:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1121. [2021-11-07 01:40:44,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.5125) internal successors, (1694), 1120 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states 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 01:40:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1694 transitions. [2021-11-07 01:40:44,787 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1694 transitions. Word has length 174 [2021-11-07 01:40:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:44,789 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1694 transitions. [2021-11-07 01:40:44,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1694 transitions. [2021-11-07 01:40:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 01:40:44,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:44,795 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:44,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:45,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:45,015 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:45,015 INFO L85 PathProgramCache]: Analyzing trace with hash 834302729, now seen corresponding path program 1 times [2021-11-07 01:40:45,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:45,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243198844] [2021-11-07 01:40:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:45,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:45,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:45,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:45,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:40:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:46,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:46,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:46,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:46,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:46,320 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:40:46,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:40:46,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:46,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:46,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:46,687 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:40:46,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:40:48,121 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:40:48,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:40:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-07 01:40:48,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-07 01:40:49,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:49,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243198844] [2021-11-07 01:40:49,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243198844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:49,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:49,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:40:49,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502129617] [2021-11-07 01:40:49,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:40:49,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:40:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:40:49,126 INFO L87 Difference]: Start difference. First operand 1121 states and 1694 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:29,807 INFO L93 Difference]: Finished difference Result 4230 states and 6418 transitions. [2021-11-07 01:41:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:41:29,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-07 01:41:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:29,831 INFO L225 Difference]: With dead ends: 4230 [2021-11-07 01:41:29,832 INFO L226 Difference]: Without dead ends: 3119 [2021-11-07 01:41:29,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2021-11-07 01:41:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 1345. [2021-11-07 01:41:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 1.5476190476190477) internal successors, (2080), 1344 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states 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 01:41:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 2080 transitions. [2021-11-07 01:41:29,953 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 2080 transitions. Word has length 174 [2021-11-07 01:41:29,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:29,954 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 2080 transitions. [2021-11-07 01:41:29,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 2080 transitions. [2021-11-07 01:41:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 01:41:29,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:29,960 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:29,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:30,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:30,185 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 289430155, now seen corresponding path program 1 times [2021-11-07 01:41:30,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:30,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115572225] [2021-11-07 01:41:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:30,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:30,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:30,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:30,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:41:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:41:31,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:31,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:31,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:31,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:31,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:31,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:31,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:32,167 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:41:32,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:41:34,209 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:41:34,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:41:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 01:41:34,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 01:41:34,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:34,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115572225] [2021-11-07 01:41:34,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115572225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:34,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:34,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:41:34,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394030723] [2021-11-07 01:41:34,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:41:34,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:41:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:41:34,967 INFO L87 Difference]: Start difference. First operand 1345 states and 2080 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 01:41:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:54,987 INFO L93 Difference]: Finished difference Result 3252 states and 5030 transitions. [2021-11-07 01:41:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:54,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 174 [2021-11-07 01:41:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:55,008 INFO L225 Difference]: With dead ends: 3252 [2021-11-07 01:41:55,008 INFO L226 Difference]: Without dead ends: 1917 [2021-11-07 01:41:55,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 342 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-11-07 01:41:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1597. [2021-11-07 01:41:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1596 states have (on average 1.5795739348370927) internal successors, (2521), 1596 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states 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 01:41:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2521 transitions. [2021-11-07 01:41:55,141 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2521 transitions. Word has length 174 [2021-11-07 01:41:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:55,141 INFO L470 AbstractCegarLoop]: Abstraction has 1597 states and 2521 transitions. [2021-11-07 01:41:55,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 01:41:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2521 transitions. [2021-11-07 01:41:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-07 01:41:55,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:55,148 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:55,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:55,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:55,373 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash -975340285, now seen corresponding path program 1 times [2021-11-07 01:41:55,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:55,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268584358] [2021-11-07 01:41:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:55,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:55,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:55,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:55,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:41:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:57,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:41:57,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:57,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:57,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:57,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:57,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:57,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:57,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:57,677 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:41:57,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:41:58,491 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:41:58,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:41:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:41:58,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:41:59,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:59,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268584358] [2021-11-07 01:41:59,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268584358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:59,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:59,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:41:59,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003287117] [2021-11-07 01:41:59,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:59,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:59,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:59,320 INFO L87 Difference]: Start difference. First operand 1597 states and 2521 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:35,790 INFO L93 Difference]: Finished difference Result 4741 states and 7399 transitions. [2021-11-07 01:42:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:42:35,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-07 01:42:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:35,819 INFO L225 Difference]: With dead ends: 4741 [2021-11-07 01:42:35,819 INFO L226 Difference]: Without dead ends: 3154 [2021-11-07 01:42:35,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:42:35,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2021-11-07 01:42:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 1869. [2021-11-07 01:42:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5813704496788008) internal successors, (2954), 1868 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states 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 01:42:36,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2954 transitions. [2021-11-07 01:42:36,007 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2954 transitions. Word has length 187 [2021-11-07 01:42:36,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:36,008 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2954 transitions. [2021-11-07 01:42:36,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2954 transitions. [2021-11-07 01:42:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 01:42:36,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:36,016 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:36,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:36,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:36,230 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:42:36,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:36,231 INFO L85 PathProgramCache]: Analyzing trace with hash 988941552, now seen corresponding path program 1 times [2021-11-07 01:42:36,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:36,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232008939] [2021-11-07 01:42:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:36,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:36,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:36,233 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:36,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:42:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:38,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:42:38,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:38,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:38,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:38,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:38,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:38,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:38,633 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:42:38,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:42:39,117 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:42:39,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:42:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:42:39,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:42:39,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:39,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232008939] [2021-11-07 01:42:39,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232008939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:39,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:39,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:42:39,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393868058] [2021-11-07 01:42:39,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:39,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:39,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:39,998 INFO L87 Difference]: Start difference. First operand 1869 states and 2954 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:25,218 INFO L93 Difference]: Finished difference Result 4923 states and 7653 transitions. [2021-11-07 01:43:25,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:43:25,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-07 01:43:25,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:25,241 INFO L225 Difference]: With dead ends: 4923 [2021-11-07 01:43:25,241 INFO L226 Difference]: Without dead ends: 3064 [2021-11-07 01:43:25,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-11-07 01:43:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1869. [2021-11-07 01:43:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5626338329764453) internal successors, (2919), 1868 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states 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 01:43:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2919 transitions. [2021-11-07 01:43:25,411 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2919 transitions. Word has length 188 [2021-11-07 01:43:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:25,411 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2919 transitions. [2021-11-07 01:43:25,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2919 transitions. [2021-11-07 01:43:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 01:43:25,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:25,418 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:25,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:25,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:25,644 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:25,644 INFO L85 PathProgramCache]: Analyzing trace with hash -617202468, now seen corresponding path program 1 times [2021-11-07 01:43:25,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:25,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194205298] [2021-11-07 01:43:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:25,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:25,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:25,647 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:25,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:43:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:43:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:28,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:43:28,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:43:28,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:43:28,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:43:28,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:43:28,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:43:28,619 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:43:28,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:43:29,163 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:43:29,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:43:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:43:29,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:43:29,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:29,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194205298] [2021-11-07 01:43:29,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194205298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:29,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:29,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:43:29,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75399110] [2021-11-07 01:43:29,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:29,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:29,967 INFO L87 Difference]: Start difference. First operand 1869 states and 2919 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:06,101 INFO L93 Difference]: Finished difference Result 5115 states and 7903 transitions. [2021-11-07 01:44:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:44:06,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-07 01:44:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:06,122 INFO L225 Difference]: With dead ends: 5115 [2021-11-07 01:44:06,123 INFO L226 Difference]: Without dead ends: 3256 [2021-11-07 01:44:06,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-11-07 01:44:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1965. [2021-11-07 01:44:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.5417515274949083) internal successors, (3028), 1964 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states 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 01:44:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 3028 transitions. [2021-11-07 01:44:06,302 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 3028 transitions. Word has length 188 [2021-11-07 01:44:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:06,302 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 3028 transitions. [2021-11-07 01:44:06,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 3028 transitions. [2021-11-07 01:44:06,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 01:44:06,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:06,310 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:06,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:06,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:06,526 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1565412453, now seen corresponding path program 1 times [2021-11-07 01:44:06,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:06,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74207618] [2021-11-07 01:44:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:06,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:06,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:06,529 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:06,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:44:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:08,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:08,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:08,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:08,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:08,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:08,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:08,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:08,900 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:44:08,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:44:09,884 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:44:09,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:44:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:44:10,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:44:10,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:10,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74207618] [2021-11-07 01:44:10,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74207618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:10,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:10,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:10,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208480753] [2021-11-07 01:44:10,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:10,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:10,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:10,699 INFO L87 Difference]: Start difference. First operand 1965 states and 3028 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:45,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:45,203 INFO L93 Difference]: Finished difference Result 5097 states and 7783 transitions. [2021-11-07 01:44:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:44:45,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-07 01:44:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:45,225 INFO L225 Difference]: With dead ends: 5097 [2021-11-07 01:44:45,225 INFO L226 Difference]: Without dead ends: 3142 [2021-11-07 01:44:45,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-11-07 01:44:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 1981. [2021-11-07 01:44:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.5323232323232323) internal successors, (3034), 1980 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states 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 01:44:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3034 transitions. [2021-11-07 01:44:45,398 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3034 transitions. Word has length 188 [2021-11-07 01:44:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:45,399 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3034 transitions. [2021-11-07 01:44:45,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3034 transitions. [2021-11-07 01:44:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 01:44:45,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:45,407 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:45,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:45,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:45,630 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1437107291, now seen corresponding path program 1 times [2021-11-07 01:44:45,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:45,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655599209] [2021-11-07 01:44:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:45,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:45,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:45,634 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:45,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:44:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:47,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:44:47,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:48,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:48,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:48,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:48,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:48,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:48,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:48,639 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:44:48,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:44:49,506 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:44:49,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:44:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:44:49,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:44:50,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:50,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655599209] [2021-11-07 01:44:50,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655599209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:50,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:50,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:50,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828617932] [2021-11-07 01:44:50,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:50,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:50,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:50,396 INFO L87 Difference]: Start difference. First operand 1981 states and 3034 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:21,743 INFO L93 Difference]: Finished difference Result 5095 states and 7745 transitions. [2021-11-07 01:45:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:45:21,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-07 01:45:21,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:21,800 INFO L225 Difference]: With dead ends: 5095 [2021-11-07 01:45:21,800 INFO L226 Difference]: Without dead ends: 3124 [2021-11-07 01:45:21,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:45:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2021-11-07 01:45:22,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 1981. [2021-11-07 01:45:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.5191919191919192) internal successors, (3008), 1980 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 01:45:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3008 transitions. [2021-11-07 01:45:22,049 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3008 transitions. Word has length 188 [2021-11-07 01:45:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:22,049 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3008 transitions. [2021-11-07 01:45:22,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3008 transitions. [2021-11-07 01:45:22,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-07 01:45:22,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:22,057 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:22,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:22,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:22,283 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:22,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:22,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1627778118, now seen corresponding path program 1 times [2021-11-07 01:45:22,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:22,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580612922] [2021-11-07 01:45:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:22,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:22,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:22,286 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:22,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:45:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:25,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:45:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:25,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:25,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:45:25,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:45:25,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:45:25,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:45:25,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:45:25,884 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:45:25,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:45:26,484 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:45:26,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:45:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:45:26,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:45:27,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:27,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580612922] [2021-11-07 01:45:27,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580612922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:27,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:27,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:45:27,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047071896] [2021-11-07 01:45:27,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:27,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:27,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:27,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:45:27,397 INFO L87 Difference]: Start difference. First operand 1981 states and 3008 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:06,181 INFO L93 Difference]: Finished difference Result 5191 states and 7853 transitions. [2021-11-07 01:46:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:46:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-07 01:46:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:06,218 INFO L225 Difference]: With dead ends: 5191 [2021-11-07 01:46:06,218 INFO L226 Difference]: Without dead ends: 3220 [2021-11-07 01:46:06,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:46:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-11-07 01:46:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1989. [2021-11-07 01:46:06,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 1.5035211267605635) internal successors, (2989), 1988 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states 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 01:46:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 2989 transitions. [2021-11-07 01:46:06,485 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 2989 transitions. Word has length 189 [2021-11-07 01:46:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:06,486 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 2989 transitions. [2021-11-07 01:46:06,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 2989 transitions. [2021-11-07 01:46:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 01:46:06,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:06,493 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:06,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:06,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:06,714 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:06,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1146228617, now seen corresponding path program 1 times [2021-11-07 01:46:06,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:06,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830966781] [2021-11-07 01:46:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:06,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:06,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:06,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:06,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:46:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:09,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:46:09,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:09,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:09,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:09,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:10,347 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:46:10,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:46:10,986 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:46:10,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:46:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:46:11,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:46:11,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:11,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830966781] [2021-11-07 01:46:11,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830966781] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:11,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:11,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:46:11,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611536275] [2021-11-07 01:46:11,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:11,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:11,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:11,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:11,953 INFO L87 Difference]: Start difference. First operand 1989 states and 2989 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:48,823 INFO L93 Difference]: Finished difference Result 5327 states and 7979 transitions. [2021-11-07 01:46:48,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:46:48,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-11-07 01:46:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:48,831 INFO L225 Difference]: With dead ends: 5327 [2021-11-07 01:46:48,832 INFO L226 Difference]: Without dead ends: 3348 [2021-11-07 01:46:48,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:46:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-11-07 01:46:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2115. [2021-11-07 01:46:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 1.4824976348155157) internal successors, (3134), 2114 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states 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 01:46:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3134 transitions. [2021-11-07 01:46:49,094 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3134 transitions. Word has length 190 [2021-11-07 01:46:49,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:49,094 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 3134 transitions. [2021-11-07 01:46:49,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:49,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3134 transitions. [2021-11-07 01:46:49,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-07 01:46:49,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:49,101 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:49,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:46:49,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:49,317 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:49,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1653439691, now seen corresponding path program 1 times [2021-11-07 01:46:49,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:49,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955171733] [2021-11-07 01:46:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:49,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:49,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:49,320 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:49,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:46:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:46:51,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:52,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:52,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:52,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:52,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:52,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:52,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:52,573 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:46:52,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:46:53,462 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:46:53,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:46:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:46:53,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:46:54,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:54,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955171733] [2021-11-07 01:46:54,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955171733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:54,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:54,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:46:54,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535352968] [2021-11-07 01:46:54,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:54,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:54,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:54,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:54,426 INFO L87 Difference]: Start difference. First operand 2115 states and 3134 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:36,002 INFO L93 Difference]: Finished difference Result 5273 states and 7828 transitions. [2021-11-07 01:47:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:47:36,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-07 01:47:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:36,009 INFO L225 Difference]: With dead ends: 5273 [2021-11-07 01:47:36,009 INFO L226 Difference]: Without dead ends: 3168 [2021-11-07 01:47:36,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:47:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-11-07 01:47:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2115. [2021-11-07 01:47:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 1.4659413434247872) internal successors, (3099), 2114 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states 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 01:47:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3099 transitions. [2021-11-07 01:47:36,302 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3099 transitions. Word has length 191 [2021-11-07 01:47:36,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:36,302 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 3099 transitions. [2021-11-07 01:47:36,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3099 transitions. [2021-11-07 01:47:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-07 01:47:36,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:36,309 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:36,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:36,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:36,522 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:36,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1981897227, now seen corresponding path program 1 times [2021-11-07 01:47:36,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:36,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243502168] [2021-11-07 01:47:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:36,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:36,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:36,538 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:36,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:47:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:39,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:47:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:39,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:39,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:47:39,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:47:39,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:47:39,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:47:39,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:47:39,990 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:47:39,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:47:41,112 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:47:41,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:47:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:47:41,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:47:41,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:41,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243502168] [2021-11-07 01:47:41,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243502168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:41,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:41,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:47:41,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655700775] [2021-11-07 01:47:41,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:47:41,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:41,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:47:41,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:47:41,992 INFO L87 Difference]: Start difference. First operand 2115 states and 3099 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:22,672 INFO L93 Difference]: Finished difference Result 5253 states and 7721 transitions. [2021-11-07 01:48:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:48:22,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-07 01:48:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:22,695 INFO L225 Difference]: With dead ends: 5253 [2021-11-07 01:48:22,696 INFO L226 Difference]: Without dead ends: 3384 [2021-11-07 01:48:22,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:48:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-11-07 01:48:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2294. [2021-11-07 01:48:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 1.4452682075883123) internal successors, (3314), 2293 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states 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 01:48:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 3314 transitions. [2021-11-07 01:48:22,905 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 3314 transitions. Word has length 191 [2021-11-07 01:48:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:22,906 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 3314 transitions. [2021-11-07 01:48:22,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:22,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 3314 transitions. [2021-11-07 01:48:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 01:48:22,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:22,912 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:22,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:23,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:23,126 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:23,127 INFO L85 PathProgramCache]: Analyzing trace with hash 468579752, now seen corresponding path program 1 times [2021-11-07 01:48:23,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:23,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121635355] [2021-11-07 01:48:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:23,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:23,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:23,129 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:23,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:48:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:48:25,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:26,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:26,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:48:26,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:48:26,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:48:26,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:48:26,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:48:26,626 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:48:26,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:48:27,738 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:48:27,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:48:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:48:28,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:48:28,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:28,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121635355] [2021-11-07 01:48:28,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121635355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:28,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:28,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:48:28,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798512059] [2021-11-07 01:48:28,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:28,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:28,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:28,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:28,673 INFO L87 Difference]: Start difference. First operand 2294 states and 3314 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 01:49:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:07,044 INFO L93 Difference]: Finished difference Result 5423 states and 7898 transitions. [2021-11-07 01:49:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:49:07,046 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 192 [2021-11-07 01:49:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:07,054 INFO L225 Difference]: With dead ends: 5423 [2021-11-07 01:49:07,054 INFO L226 Difference]: Without dead ends: 3395 [2021-11-07 01:49:07,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-11-07 01:49:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2322. [2021-11-07 01:49:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 1.4364498061180526) internal successors, (3334), 2321 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states 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 01:49:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 3334 transitions. [2021-11-07 01:49:07,311 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 3334 transitions. Word has length 192 [2021-11-07 01:49:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:07,311 INFO L470 AbstractCegarLoop]: Abstraction has 2322 states and 3334 transitions. [2021-11-07 01:49:07,312 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 01:49:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 3334 transitions. [2021-11-07 01:49:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-07 01:49:07,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:07,318 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:07,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:49:07,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:07,538 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:07,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2055877882, now seen corresponding path program 1 times [2021-11-07 01:49:07,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:07,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261145543] [2021-11-07 01:49:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:07,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:07,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:07,541 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:07,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:49:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:10,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:10,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:10,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:10,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:10,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:10,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:10,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:11,320 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:49:11,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:49:12,496 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:49:12,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:49:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:49:12,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:49:13,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:13,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261145543] [2021-11-07 01:49:13,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261145543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:13,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:13,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:13,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149055180] [2021-11-07 01:49:13,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:13,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:13,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:13,398 INFO L87 Difference]: Start difference. First operand 2322 states and 3334 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:50,427 INFO L93 Difference]: Finished difference Result 5592 states and 8073 transitions. [2021-11-07 01:49:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:49:50,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-11-07 01:49:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:50,437 INFO L225 Difference]: With dead ends: 5592 [2021-11-07 01:49:50,438 INFO L226 Difference]: Without dead ends: 3549 [2021-11-07 01:49:50,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2021-11-07 01:49:50,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 2519. [2021-11-07 01:49:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 1.4166004765687052) internal successors, (3567), 2518 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states 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 01:49:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 3567 transitions. [2021-11-07 01:49:50,843 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 3567 transitions. Word has length 193 [2021-11-07 01:49:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:50,844 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 3567 transitions. [2021-11-07 01:49:50,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 3567 transitions. [2021-11-07 01:49:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-07 01:49:50,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:50,867 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:50,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:51,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:51,078 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:51,079 INFO L85 PathProgramCache]: Analyzing trace with hash 967910484, now seen corresponding path program 1 times [2021-11-07 01:49:51,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:51,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83854226] [2021-11-07 01:49:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:51,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:51,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:51,081 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:51,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:49:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:54,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:54,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:54,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:54,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:54,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:54,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:54,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:54,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:54,921 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:49:54,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:49:56,289 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:49:56,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:49:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:49:56,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:49:57,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:57,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83854226] [2021-11-07 01:49:57,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83854226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:57,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:57,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:57,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963801849] [2021-11-07 01:49:57,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:57,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:57,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:57,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:57,197 INFO L87 Difference]: Start difference. First operand 2519 states and 3567 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:30,567 INFO L93 Difference]: Finished difference Result 6212 states and 8851 transitions. [2021-11-07 01:50:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:50:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-07 01:50:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:30,574 INFO L225 Difference]: With dead ends: 6212 [2021-11-07 01:50:30,574 INFO L226 Difference]: Without dead ends: 3714 [2021-11-07 01:50:30,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 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 01:50:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2021-11-07 01:50:30,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 2703. [2021-11-07 01:50:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 1.3993338267949667) internal successors, (3781), 2702 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states 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 01:50:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 3781 transitions. [2021-11-07 01:50:30,868 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 3781 transitions. Word has length 196 [2021-11-07 01:50:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:30,869 INFO L470 AbstractCegarLoop]: Abstraction has 2703 states and 3781 transitions. [2021-11-07 01:50:30,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 3781 transitions. [2021-11-07 01:50:30,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-07 01:50:30,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:30,890 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:30,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:31,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:31,091 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1968533010, now seen corresponding path program 1 times [2021-11-07 01:50:31,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:31,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178766978] [2021-11-07 01:50:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:31,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:31,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:31,094 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:31,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:50:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:34,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:50:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:50:34,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:50:34,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:50:34,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:50:34,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:50:35,085 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:50:35,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:50:36,427 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:50:36,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:50:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:50:36,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:50:37,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:37,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178766978] [2021-11-07 01:50:37,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178766978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:37,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:37,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:50:37,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712864444] [2021-11-07 01:50:37,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:50:37,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:37,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:50:37,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:50:37,418 INFO L87 Difference]: Start difference. First operand 2703 states and 3781 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:09,452 INFO L93 Difference]: Finished difference Result 6342 states and 8963 transitions. [2021-11-07 01:51:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:51:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-11-07 01:51:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:09,460 INFO L225 Difference]: With dead ends: 6342 [2021-11-07 01:51:09,460 INFO L226 Difference]: Without dead ends: 3660 [2021-11-07 01:51:09,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 388 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 01:51:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-11-07 01:51:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 2711. [2021-11-07 01:51:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3915129151291512) internal successors, (3771), 2710 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states 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 01:51:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3771 transitions. [2021-11-07 01:51:09,717 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3771 transitions. Word has length 197 [2021-11-07 01:51:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:09,718 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3771 transitions. [2021-11-07 01:51:09,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3771 transitions. [2021-11-07 01:51:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-07 01:51:09,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:09,724 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:09,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:09,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:09,938 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:51:09,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:09,939 INFO L85 PathProgramCache]: Analyzing trace with hash -522942010, now seen corresponding path program 1 times [2021-11-07 01:51:09,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:09,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063716717] [2021-11-07 01:51:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:09,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:09,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:09,941 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:09,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:51:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:51:13,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:13,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:13,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:13,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:13,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:13,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:13,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:13,732 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:51:13,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:51:15,142 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:51:15,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:51:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:51:15,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:51:16,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:16,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063716717] [2021-11-07 01:51:16,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063716717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:16,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:16,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:51:16,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022426908] [2021-11-07 01:51:16,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:51:16,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:51:16,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:51:16,005 INFO L87 Difference]: Start difference. First operand 2711 states and 3771 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 01:51:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:47,971 INFO L93 Difference]: Finished difference Result 6517 states and 9133 transitions. [2021-11-07 01:51:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:51:47,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 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 197 [2021-11-07 01:51:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:47,979 INFO L225 Difference]: With dead ends: 6517 [2021-11-07 01:51:47,980 INFO L226 Difference]: Without dead ends: 3827 [2021-11-07 01:51:47,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 388 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 01:51:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-11-07 01:51:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 2944. [2021-11-07 01:51:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2944 states, 2943 states have (on average 1.3785253143051308) internal successors, (4057), 2943 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states 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 01:51:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 4057 transitions. [2021-11-07 01:51:48,332 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 4057 transitions. Word has length 197 [2021-11-07 01:51:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:48,333 INFO L470 AbstractCegarLoop]: Abstraction has 2944 states and 4057 transitions. [2021-11-07 01:51:48,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 01:51:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 4057 transitions. [2021-11-07 01:51:48,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-07 01:51:48,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:48,339 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:48,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:48,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:48,562 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:51:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:48,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1162661829, now seen corresponding path program 1 times [2021-11-07 01:51:48,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:48,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939735331] [2021-11-07 01:51:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:48,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:48,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:48,565 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:48,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e757416-b650-47ed-8fb6-ab5c9202b436/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:51:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:51,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:51:51,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:51,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 138 [2021-11-07 01:51:51,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 90 [2021-11-07 01:51:51,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:51,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:51,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:52,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:52,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:52,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:52,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:52,007 INFO L190 IndexEqualityManager]: detected not equals via solver