./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/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 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:00:41,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:00:41,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:00:41,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:00:41,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:00:41,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:00:41,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:00:41,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:00:41,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:00:41,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:00:41,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:00:41,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:00:41,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:00:41,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:00:41,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:00:41,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:00:41,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:00:41,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:00:41,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:00:41,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:00:41,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:00:41,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:00:41,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:00:41,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:00:41,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:00:41,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:00:41,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:00:41,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:00:41,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:00:41,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:00:41,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:00:41,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:00:41,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:00:41,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:00:41,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:00:41,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:00:41,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:00:41,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:00:41,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:00:41,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:00:41,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:00:41,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:00:41,752 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:00:41,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:00:41,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:00:41,755 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:00:41,756 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:00:41,756 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:00:41,756 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:00:41,756 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:00:41,764 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:00:41,764 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:00:41,766 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:00:41,766 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:00:41,766 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:00:41,767 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:00:41,767 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:00:41,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:00:41,768 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:00:41,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:00:41,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:00:41,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:00:41,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:00:41,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:00:41,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:00:41,770 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:00:41,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:00:41,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:00:41,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:00:41,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:00:41,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:00:41,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:00:41,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:00:41,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:00:41,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:00:41,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:00:41,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:00:41,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:00:41,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:00:41,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:00:41,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:00:41,774 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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df [2021-11-07 01:00:42,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:00:42,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:00:42,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:00:42,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:00:42,107 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:00:42,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-07 01:00:42,200 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/data/eb69d7667/505315c0b09f401ba484d2192e8ace09/FLAG5e23fee68 [2021-11-07 01:00:43,050 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:00:43,051 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-07 01:00:43,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/data/eb69d7667/505315c0b09f401ba484d2192e8ace09/FLAG5e23fee68 [2021-11-07 01:00:43,169 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/data/eb69d7667/505315c0b09f401ba484d2192e8ace09 [2021-11-07 01:00:43,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:00:43,176 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:00:43,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:00:43,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:00:43,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:00:43,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:00:43" (1/1) ... [2021-11-07 01:00:43,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@776f7133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:43, skipping insertion in model container [2021-11-07 01:00:43,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:00:43" (1/1) ... [2021-11-07 01:00:43,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:00:43,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:00:43,878 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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-07 01:00:43,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:00:43,935 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 01:00:43,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@734ffe96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:43, skipping insertion in model container [2021-11-07 01:00:43,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:00:43,937 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:00:43,942 INFO L168 Benchmark]: Toolchain (without parser) took 762.22 ms. Allocated memory is still 121.6 MB. Free memory was 85.1 MB in the beginning and 84.7 MB in the end (delta: 395.4 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:00:43,944 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 88.1 MB. Free memory is still 42.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:00:43,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 756.10 ms. Allocated memory is still 121.6 MB. Free memory was 84.7 MB in the beginning and 85.0 MB in the end (delta: -322.4 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:00:43,948 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 88.1 MB. Free memory is still 42.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 756.10 ms. Allocated memory is still 121.6 MB. Free memory was 84.7 MB in the beginning and 85.0 MB in the end (delta: -322.4 kB). Peak memory consumption was 12.6 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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/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 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:00:46,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:00:46,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:00:46,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:00:46,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:00:46,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:00:46,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:00:46,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:00:46,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:00:46,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:00:46,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:00:46,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:00:46,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:00:46,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:00:46,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:00:46,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:00:46,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:00:46,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:00:46,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:00:46,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:00:46,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:00:46,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:00:46,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:00:46,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:00:46,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:00:46,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:00:46,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:00:46,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:00:46,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:00:46,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:00:46,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:00:46,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:00:46,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:00:46,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:00:46,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:00:46,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:00:46,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:00:46,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:00:46,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:00:46,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:00:46,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:00:46,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:00:46,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:00:46,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:00:46,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:00:46,679 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:00:46,680 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:00:46,680 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:00:46,680 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:00:46,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:00:46,680 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:00:46,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:00:46,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:00:46,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:00:46,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:00:46,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:00:46,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:00:46,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:00:46,684 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:00:46,685 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:00:46,685 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:00:46,685 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:00:46,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:00:46,685 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:00:46,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:00:46,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:00:46,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:00:46,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:00:46,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:00:46,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:00:46,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:00:46,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:00:46,687 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:00:46,687 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:00:46,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:00:46,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:00:46,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:00:46,689 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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df [2021-11-07 01:00:47,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:00:47,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:00:47,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:00:47,116 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:00:47,117 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:00:47,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-07 01:00:47,191 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/data/e84d18db7/120e7393d42b4831bc3f59cf79e78445/FLAGf978c6d4d [2021-11-07 01:00:47,875 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:00:47,875 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-07 01:00:47,903 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/data/e84d18db7/120e7393d42b4831bc3f59cf79e78445/FLAGf978c6d4d [2021-11-07 01:00:48,087 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/data/e84d18db7/120e7393d42b4831bc3f59cf79e78445 [2021-11-07 01:00:48,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:00:48,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:00:48,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:00:48,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:00:48,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:00:48,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:00:48" (1/1) ... [2021-11-07 01:00:48,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@593cc569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:48, skipping insertion in model container [2021-11-07 01:00:48,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:00:48" (1/1) ... [2021-11-07 01:00:48,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:00:48,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:00:48,701 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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-07 01:00:48,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:00:48,752 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:00:48,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:00:48,886 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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-07 01:00:48,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:00:48,897 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:00:49,019 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_40e01467-e14e-4af9-88ed-b0a6e0a02c76/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-07 01:00:49,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:00:49,042 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:00:49,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49 WrapperNode [2021-11-07 01:00:49,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:00:49,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:00:49,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:00:49,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:00:49,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (1/1) ... [2021-11-07 01:00:49,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (1/1) ... [2021-11-07 01:00:49,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:00:49,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:00:49,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:00:49,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:00:49,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (1/1) ... [2021-11-07 01:00:49,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (1/1) ... [2021-11-07 01:00:49,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (1/1) ... [2021-11-07 01:00:49,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (1/1) ... [2021-11-07 01:00:49,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (1/1) ... [2021-11-07 01:00:49,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (1/1) ... [2021-11-07 01:00:49,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (1/1) ... [2021-11-07 01:00:49,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:00:49,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:00:49,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:00:49,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:00:49,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (1/1) ... [2021-11-07 01:00:49,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:00:49,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:00:49,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:00:49,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:00:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:00:49,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:00:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:00:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:00:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:00:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:00:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:00:49,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:00:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:00:49,660 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:00:59,721 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 01:00:59,721 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 01:00:59,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:00:59,731 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:00:59,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:00:59 BoogieIcfgContainer [2021-11-07 01:00:59,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:00:59,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:00:59,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:00:59,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:00:59,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:00:48" (1/3) ... [2021-11-07 01:00:59,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9bd44e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:00:59, skipping insertion in model container [2021-11-07 01:00:59,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:00:49" (2/3) ... [2021-11-07 01:00:59,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9bd44e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:00:59, skipping insertion in model container [2021-11-07 01:00:59,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:00:59" (3/3) ... [2021-11-07 01:00:59,743 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.13.i.cil-1.c [2021-11-07 01:00:59,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:00:59,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:00:59,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:00:59,810 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 01:00:59,810 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:00:59,831 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 01:00:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:00:59,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:00:59,841 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 01:00:59,842 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:00:59,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:00:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-11-07 01:00:59,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:00:59,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410072272] [2021-11-07 01:00:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:00:59,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:00:59,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:00:59,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:00:59,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:01:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:00,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:01:00,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:00,589 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 01:01:00,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:00,882 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 01:01:00,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:00,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410072272] [2021-11-07 01:01:00,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410072272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:00,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:00,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:01:00,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083490228] [2021-11-07 01:01:00,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:01:00,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:01:00,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:01:00,914 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 01:01:01,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:01,165 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-07 01:01:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:01:01,167 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 01:01:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:01,185 INFO L225 Difference]: With dead ends: 566 [2021-11-07 01:01:01,185 INFO L226 Difference]: Without dead ends: 387 [2021-11-07 01:01:01,190 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 01:01:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-07 01:01:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-07 01:01:01,263 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 01:01:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-07 01:01:01,268 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-07 01:01:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:01,269 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-07 01:01:01,269 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 01:01:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-07 01:01:01,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:01:01,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:01,277 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 01:01:01,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:01,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:01,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:01,488 INFO L85 PathProgramCache]: Analyzing trace with hash 457194935, now seen corresponding path program 1 times [2021-11-07 01:01:01,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:01,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967324702] [2021-11-07 01:01:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:01,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:01,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:01,491 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:01,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:01:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:01:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:02,089 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 01:01:02,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:02,359 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 01:01:02,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:02,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967324702] [2021-11-07 01:01:02,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967324702] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:02,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:02,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:01:02,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278809967] [2021-11-07 01:01:02,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:01:02,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:01:02,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:01:02,364 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 01:01:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:03,029 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-07 01:01:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:01:03,031 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 01:01:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:03,036 INFO L225 Difference]: With dead ends: 882 [2021-11-07 01:01:03,036 INFO L226 Difference]: Without dead ends: 631 [2021-11-07 01:01:03,039 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 01:01:03,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-07 01:01:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-07 01:01:03,104 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 01:01:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-07 01:01:03,109 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-07 01:01:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:03,109 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-07 01:01:03,110 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 01:01:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-07 01:01:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 01:01:03,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:03,127 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] [2021-11-07 01:01:03,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:03,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:03,343 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash 335691035, now seen corresponding path program 1 times [2021-11-07 01:01:03,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:03,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135807309] [2021-11-07 01:01:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:03,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:03,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:03,349 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:03,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:01:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:03,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:01:03,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:04,172 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 01:01:04,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:04,618 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 01:01:04,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:04,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135807309] [2021-11-07 01:01:04,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135807309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:04,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:04,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:01:04,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876048125] [2021-11-07 01:01:04,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:01:04,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:04,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:01:04,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:01:04,623 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:05,092 INFO L93 Difference]: Finished difference Result 1370 states and 2096 transitions. [2021-11-07 01:01:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:01:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 01:01:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:05,099 INFO L225 Difference]: With dead ends: 1370 [2021-11-07 01:01:05,100 INFO L226 Difference]: Without dead ends: 875 [2021-11-07 01:01:05,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 220 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 01:01:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-07 01:01:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2021-11-07 01:01:05,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.5183066361556063) internal successors, (1327), 874 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1327 transitions. [2021-11-07 01:01:05,151 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1327 transitions. Word has length 112 [2021-11-07 01:01:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:05,152 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1327 transitions. [2021-11-07 01:01:05,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1327 transitions. [2021-11-07 01:01:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 01:01:05,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:05,158 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:01:05,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:05,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:05,375 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:05,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1891434834, now seen corresponding path program 1 times [2021-11-07 01:01:05,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:05,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629695303] [2021-11-07 01:01:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:05,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:05,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:05,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:05,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:01:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:05,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:01:05,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 01:01:06,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 01:01:06,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:06,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629695303] [2021-11-07 01:01:06,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629695303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:06,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:06,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:01:06,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846772809] [2021-11-07 01:01:06,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:01:06,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:01:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:01:06,841 INFO L87 Difference]: Start difference. First operand 875 states and 1327 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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 01:01:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:07,419 INFO L93 Difference]: Finished difference Result 1863 states and 2837 transitions. [2021-11-07 01:01:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:01:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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 141 [2021-11-07 01:01:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:07,428 INFO L225 Difference]: With dead ends: 1863 [2021-11-07 01:01:07,428 INFO L226 Difference]: Without dead ends: 1122 [2021-11-07 01:01:07,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 278 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 01:01:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-07 01:01:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-11-07 01:01:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.5138269402319358) internal successors, (1697), 1121 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states 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 01:01:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1697 transitions. [2021-11-07 01:01:07,483 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1697 transitions. Word has length 141 [2021-11-07 01:01:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:07,502 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1697 transitions. [2021-11-07 01:01:07,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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 01:01:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1697 transitions. [2021-11-07 01:01:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 01:01:07,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:07,507 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] [2021-11-07 01:01:07,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:07,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:07,731 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash -490932893, now seen corresponding path program 1 times [2021-11-07 01:01:07,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:07,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327925700] [2021-11-07 01:01:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:07,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:07,734 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:07,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:01:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:08,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:01:08,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:08,932 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 01:01:08,950 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 01:01:09,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:09,051 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:01:09,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-07 01:01:09,749 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 01:01:09,749 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 849 treesize of output 821 [2021-11-07 01:01:09,883 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:01:09,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:01:09,895 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:09,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:01:09,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:09,909 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 01:01:09,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 01:01:09,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:09,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,088 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 01:01:10,209 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:01:10,210 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 01:01:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:10,252 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 01:01:10,295 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 01:01:10,301 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 01:01:10,869 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 01:01:10,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:11,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:11,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 01:01:11,583 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:11,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 01:01:11,774 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:11,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-07 01:01:11,792 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:11,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-07 01:01:11,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:11,809 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-07 01:01:11,824 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:11,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-07 01:01:11,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:11,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-07 01:01:11,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:01:11,886 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-07 01:01:12,485 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 01:01:12,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:12,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327925700] [2021-11-07 01:01:12,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327925700] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:12,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:12,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:01:12,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75637605] [2021-11-07 01:01:12,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:01:12,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:01:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:01:12,489 INFO L87 Difference]: Start difference. First operand 1122 states and 1697 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:01:41,819 INFO L93 Difference]: Finished difference Result 2241 states and 3390 transitions. [2021-11-07 01:01:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:01:41,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-07 01:01:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:01:41,831 INFO L225 Difference]: With dead ends: 2241 [2021-11-07 01:01:41,831 INFO L226 Difference]: Without dead ends: 1122 [2021-11-07 01:01:41,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 321 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 01:01:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-07 01:01:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-11-07 01:01:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.512934879571811) internal successors, (1696), 1121 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 01:01:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1696 transitions. [2021-11-07 01:01:41,893 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1696 transitions. Word has length 165 [2021-11-07 01:01:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:01:41,895 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1696 transitions. [2021-11-07 01:01:41,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:01:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1696 transitions. [2021-11-07 01:01:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 01:01:41,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:01:41,904 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] [2021-11-07 01:01:41,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:01:42,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:01:42,125 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:01:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:01:42,126 INFO L85 PathProgramCache]: Analyzing trace with hash 7623909, now seen corresponding path program 1 times [2021-11-07 01:01:42,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:01:42,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312239930] [2021-11-07 01:01:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:01:42,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:01:42,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:01:42,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:01:42,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:01:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:01:43,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:01:43,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:01:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:43,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:01:43,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:01:43,713 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:01:43,713 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 01:01:43,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:01:43,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:01:43,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:01:44,211 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:01:44,211 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 01:01:45,982 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:01:45,983 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 01:01:46,337 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 01:01:46,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:01:47,113 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 01:01:47,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:01:47,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312239930] [2021-11-07 01:01:47,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312239930] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:01:47,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:01:47,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:01:47,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492712462] [2021-11-07 01:01:47,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:01:47,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:01:47,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:01:47,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:01:47,118 INFO L87 Difference]: Start difference. First operand 1122 states and 1696 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 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 01:02:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:49,813 INFO L93 Difference]: Finished difference Result 4230 states and 6420 transitions. [2021-11-07 01:02:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:02:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 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 165 [2021-11-07 01:02:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:49,836 INFO L225 Difference]: With dead ends: 4230 [2021-11-07 01:02:49,837 INFO L226 Difference]: Without dead ends: 3118 [2021-11-07 01:02:49,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:02:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-11-07 01:02:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 1346. [2021-11-07 01:02:49,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 1.5479553903345724) internal successors, (2082), 1345 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states 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 01:02:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 2082 transitions. [2021-11-07 01:02:49,959 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 2082 transitions. Word has length 165 [2021-11-07 01:02:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:49,959 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 2082 transitions. [2021-11-07 01:02:49,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 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 01:02:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 2082 transitions. [2021-11-07 01:02:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 01:02:49,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:49,965 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] [2021-11-07 01:02:49,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:50,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:50,179 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash -2042784989, now seen corresponding path program 1 times [2021-11-07 01:02:50,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:50,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738735412] [2021-11-07 01:02:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:50,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:50,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:50,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:50,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:02:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:02:51,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:51,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:02:51,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:51,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:51,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:51,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:51,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:51,985 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:02:51,986 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 01:02:53,764 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:02:53,768 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 01:02:53,941 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 01:02:53,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:54,505 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 01:02:54,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:54,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738735412] [2021-11-07 01:02:54,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738735412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:54,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:54,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:02:54,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142337997] [2021-11-07 01:02:54,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:02:54,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:54,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:02:54,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:02:54,508 INFO L87 Difference]: Start difference. First operand 1346 states and 2082 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 01:03:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:14,338 INFO L93 Difference]: Finished difference Result 3254 states and 5034 transitions. [2021-11-07 01:03:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:14,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 165 [2021-11-07 01:03:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:14,364 INFO L225 Difference]: With dead ends: 3254 [2021-11-07 01:03:14,365 INFO L226 Difference]: Without dead ends: 1918 [2021-11-07 01:03:14,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 324 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 01:03:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-07 01:03:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1598. [2021-11-07 01:03:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 1.5798371947401377) internal successors, (2523), 1597 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states 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 01:03:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2523 transitions. [2021-11-07 01:03:14,499 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2523 transitions. Word has length 165 [2021-11-07 01:03:14,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:14,500 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 2523 transitions. [2021-11-07 01:03:14,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 01:03:14,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2523 transitions. [2021-11-07 01:03:14,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-07 01:03:14,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:14,506 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] [2021-11-07 01:03:14,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:14,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:14,729 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:14,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1123899760, now seen corresponding path program 1 times [2021-11-07 01:03:14,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:14,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392667427] [2021-11-07 01:03:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:14,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:14,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:14,735 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:14,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:03:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:16,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:03:16,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:16,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:16,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:16,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:16,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:16,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:16,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:16,815 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:03:16,816 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 01:03:17,614 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:03:17,614 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 01:03:17,823 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 01:03:17,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:18,331 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 01:03:18,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:18,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392667427] [2021-11-07 01:03:18,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392667427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:18,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:18,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:03:18,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307266014] [2021-11-07 01:03:18,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:03:18,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:18,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:03:18,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:03:18,334 INFO L87 Difference]: Start difference. First operand 1598 states and 2523 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 01:03:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:53,089 INFO L93 Difference]: Finished difference Result 4742 states and 7402 transitions. [2021-11-07 01:03:53,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:03:53,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 178 [2021-11-07 01:03:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:53,117 INFO L225 Difference]: With dead ends: 4742 [2021-11-07 01:03:53,118 INFO L226 Difference]: Without dead ends: 3154 [2021-11-07 01:03:53,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 350 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 01:03:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2021-11-07 01:03:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 1870. [2021-11-07 01:03:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.5815944355270197) internal successors, (2956), 1869 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states 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 01:03:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2956 transitions. [2021-11-07 01:03:53,290 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2956 transitions. Word has length 178 [2021-11-07 01:03:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:53,291 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2956 transitions. [2021-11-07 01:03:53,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 01:03:53,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2956 transitions. [2021-11-07 01:03:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-07 01:03:53,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:53,297 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] [2021-11-07 01:03:53,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:53,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:53,514 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:53,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:53,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1047988863, now seen corresponding path program 1 times [2021-11-07 01:03:53,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:53,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063077744] [2021-11-07 01:03:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:53,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:53,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:53,517 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:53,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:03:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:03:55,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:55,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:03:55,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:55,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:55,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:55,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:55,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:55,868 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:03:55,868 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 01:03:56,430 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:03:56,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:03:56,674 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 01:03:56,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:57,185 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 01:03:57,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:57,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063077744] [2021-11-07 01:03:57,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063077744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:57,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:57,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:03:57,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434827577] [2021-11-07 01:03:57,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:03:57,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:03:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:03:57,188 INFO L87 Difference]: Start difference. First operand 1870 states and 2956 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:44,222 INFO L93 Difference]: Finished difference Result 4924 states and 7656 transitions. [2021-11-07 01:04:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:04:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-07 01:04:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:44,243 INFO L225 Difference]: With dead ends: 4924 [2021-11-07 01:04:44,244 INFO L226 Difference]: Without dead ends: 3064 [2021-11-07 01:04:44,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 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 01:04:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-11-07 01:04:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1870. [2021-11-07 01:04:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.5628678437667203) internal successors, (2921), 1869 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states 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 01:04:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2921 transitions. [2021-11-07 01:04:44,381 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2921 transitions. Word has length 179 [2021-11-07 01:04:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:44,382 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2921 transitions. [2021-11-07 01:04:44,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2921 transitions. [2021-11-07 01:04:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-07 01:04:44,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:44,394 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] [2021-11-07 01:04:44,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:44,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:44,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:04:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1895629075, now seen corresponding path program 1 times [2021-11-07 01:04:44,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:44,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323622489] [2021-11-07 01:04:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:44,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:44,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:44,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:44,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:04:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:46,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:04:46,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:46,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:04:46,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:46,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:46,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:46,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:46,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:04:47,167 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:04:47,168 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 01:04:47,744 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:04:47,745 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 01:04:47,986 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 01:04:47,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:48,585 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 01:04:48,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:48,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323622489] [2021-11-07 01:04:48,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323622489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:48,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:48,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:04:48,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321220795] [2021-11-07 01:04:48,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:04:48,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:48,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:04:48,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:04:48,587 INFO L87 Difference]: Start difference. First operand 1870 states and 2921 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 01:05:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:24,838 INFO L93 Difference]: Finished difference Result 5140 states and 7946 transitions. [2021-11-07 01:05:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:05:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 179 [2021-11-07 01:05:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:24,861 INFO L225 Difference]: With dead ends: 5140 [2021-11-07 01:05:24,861 INFO L226 Difference]: Without dead ends: 3280 [2021-11-07 01:05:24,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 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 01:05:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-11-07 01:05:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 1978. [2021-11-07 01:05:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.5417298937784523) internal successors, (3048), 1977 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states 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 01:05:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3048 transitions. [2021-11-07 01:05:25,050 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3048 transitions. Word has length 179 [2021-11-07 01:05:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:25,051 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3048 transitions. [2021-11-07 01:05:25,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 01:05:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3048 transitions. [2021-11-07 01:05:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-07 01:05:25,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:25,059 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] [2021-11-07 01:05:25,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:25,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:25,275 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:05:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:25,275 INFO L85 PathProgramCache]: Analyzing trace with hash -892296342, now seen corresponding path program 1 times [2021-11-07 01:05:25,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:25,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284687795] [2021-11-07 01:05:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:25,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:25,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:25,285 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:25,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:05:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:27,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:05:27,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:27,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:05:27,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:05:27,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:05:27,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:05:27,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:05:27,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:05:27,776 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:05:27,777 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 01:05:28,870 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:05:28,870 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 01:05:29,105 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 01:05:29,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:29,674 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 01:05:29,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:29,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284687795] [2021-11-07 01:05:29,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284687795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:29,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:29,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:05:29,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888034124] [2021-11-07 01:05:29,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:05:29,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:29,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:05:29,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:05:29,677 INFO L87 Difference]: Start difference. First operand 1978 states and 3048 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:00,801 INFO L93 Difference]: Finished difference Result 5338 states and 8173 transitions. [2021-11-07 01:06:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:06:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-07 01:06:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:00,824 INFO L225 Difference]: With dead ends: 5338 [2021-11-07 01:06:00,824 INFO L226 Difference]: Without dead ends: 3370 [2021-11-07 01:06:00,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 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 01:06:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2021-11-07 01:06:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 2156. [2021-11-07 01:06:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 1.534106728538283) internal successors, (3306), 2155 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states 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 01:06:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3306 transitions. [2021-11-07 01:06:01,026 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3306 transitions. Word has length 179 [2021-11-07 01:06:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:01,026 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 3306 transitions. [2021-11-07 01:06:01,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3306 transitions. [2021-11-07 01:06:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-07 01:06:01,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:01,034 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] [2021-11-07 01:06:01,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:01,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:01,259 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:01,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1478052906, now seen corresponding path program 1 times [2021-11-07 01:06:01,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:01,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670007570] [2021-11-07 01:06:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:01,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:01,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:01,263 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:01,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:06:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:02,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:06:02,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:03,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:03,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:03,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:03,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:03,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:03,596 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:06:03,597 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 01:06:04,355 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:06:04,356 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 01:06:04,537 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 01:06:04,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:04,993 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 01:06:04,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:04,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670007570] [2021-11-07 01:06:04,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670007570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:04,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:04,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:06:04,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072023850] [2021-11-07 01:06:04,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:06:04,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:06:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:06:04,995 INFO L87 Difference]: Start difference. First operand 2156 states and 3306 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:33,968 INFO L93 Difference]: Finished difference Result 5453 states and 8297 transitions. [2021-11-07 01:06:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:06:33,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-07 01:06:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:33,987 INFO L225 Difference]: With dead ends: 5453 [2021-11-07 01:06:33,987 INFO L226 Difference]: Without dead ends: 3307 [2021-11-07 01:06:33,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 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 01:06:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2021-11-07 01:06:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 2156. [2021-11-07 01:06:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 1.5178654292343388) internal successors, (3271), 2155 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states 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 01:06:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3271 transitions. [2021-11-07 01:06:34,165 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3271 transitions. Word has length 179 [2021-11-07 01:06:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:34,166 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 3271 transitions. [2021-11-07 01:06:34,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:06:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3271 transitions. [2021-11-07 01:06:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 01:06:34,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:34,172 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] [2021-11-07 01:06:34,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:34,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:34,387 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:06:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:34,388 INFO L85 PathProgramCache]: Analyzing trace with hash -704993927, now seen corresponding path program 1 times [2021-11-07 01:06:34,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:34,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409560884] [2021-11-07 01:06:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:34,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:34,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:34,390 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:34,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:06:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:36,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:06:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:36,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:06:36,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:36,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:36,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:36,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:36,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:06:36,891 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:06:36,891 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 01:06:37,400 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:06:37,401 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 01:06:37,608 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 01:06:37,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:38,038 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 01:06:38,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:38,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409560884] [2021-11-07 01:06:38,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409560884] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:38,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:38,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:06:38,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600234613] [2021-11-07 01:06:38,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:06:38,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:38,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:06:38,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:06:38,040 INFO L87 Difference]: Start difference. First operand 2156 states and 3271 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 01:07:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:13,876 INFO L93 Difference]: Finished difference Result 5673 states and 8573 transitions. [2021-11-07 01:07:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:07:13,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 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 180 [2021-11-07 01:07:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:13,898 INFO L225 Difference]: With dead ends: 5673 [2021-11-07 01:07:13,898 INFO L226 Difference]: Without dead ends: 3527 [2021-11-07 01:07:13,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:07:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2021-11-07 01:07:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 2277. [2021-11-07 01:07:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 1.4986818980667838) internal successors, (3411), 2276 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states 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 01:07:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3411 transitions. [2021-11-07 01:07:14,070 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3411 transitions. Word has length 180 [2021-11-07 01:07:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:14,071 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 3411 transitions. [2021-11-07 01:07:14,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 01:07:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3411 transitions. [2021-11-07 01:07:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-07 01:07:14,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:14,076 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] [2021-11-07 01:07:14,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:07:14,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:14,300 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:07:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 320365464, now seen corresponding path program 1 times [2021-11-07 01:07:14,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:14,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686897801] [2021-11-07 01:07:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:14,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:14,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:14,303 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:14,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:07:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:16,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:07:16,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:16,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:16,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:16,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:16,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:16,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:16,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:16,978 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:07:16,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:07:17,509 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:07:17,509 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 01:07:17,711 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 01:07:17,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:18,141 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 01:07:18,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:18,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686897801] [2021-11-07 01:07:18,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686897801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:18,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:18,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:07:18,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300071620] [2021-11-07 01:07:18,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:07:18,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:07:18,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:07:18,143 INFO L87 Difference]: Start difference. First operand 2277 states and 3411 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:07:42,135 INFO L93 Difference]: Finished difference Result 5791 states and 8667 transitions. [2021-11-07 01:07:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:07:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-07 01:07:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:07:42,143 INFO L225 Difference]: With dead ends: 5791 [2021-11-07 01:07:42,143 INFO L226 Difference]: Without dead ends: 3528 [2021-11-07 01:07:42,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:07:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-11-07 01:07:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 2287. [2021-11-07 01:07:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 1.4816272965879265) internal successors, (3387), 2286 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states 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 01:07:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3387 transitions. [2021-11-07 01:07:42,286 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3387 transitions. Word has length 181 [2021-11-07 01:07:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:07:42,287 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 3387 transitions. [2021-11-07 01:07:42,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:07:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3387 transitions. [2021-11-07 01:07:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 01:07:42,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:07:42,293 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] [2021-11-07 01:07:42,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:07:42,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:07:42,507 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:07:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:07:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2082029342, now seen corresponding path program 1 times [2021-11-07 01:07:42,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:07:42,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51179486] [2021-11-07 01:07:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:07:42,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:07:42,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:07:42,509 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:07:42,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:07:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:07:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:07:44,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:07:44,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:07:44,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:44,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:44,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:44,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:44,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:07:45,073 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:07:45,073 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 01:07:45,893 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:07:45,893 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 01:07:46,122 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 01:07:46,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:07:46,579 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 01:07:46,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:07:46,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51179486] [2021-11-07 01:07:46,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51179486] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:07:46,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:07:46,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:07:46,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947716847] [2021-11-07 01:07:46,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:07:46,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:07:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:07:46,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:07:46,581 INFO L87 Difference]: Start difference. First operand 2287 states and 3387 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:19,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:19,026 INFO L93 Difference]: Finished difference Result 5620 states and 8336 transitions. [2021-11-07 01:08:19,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:08:19,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-07 01:08:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:19,033 INFO L225 Difference]: With dead ends: 5620 [2021-11-07 01:08:19,033 INFO L226 Difference]: Without dead ends: 3348 [2021-11-07 01:08:19,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 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 01:08:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-11-07 01:08:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2287. [2021-11-07 01:08:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 1.4623797025371827) internal successors, (3343), 2286 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states 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 01:08:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3343 transitions. [2021-11-07 01:08:19,168 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3343 transitions. Word has length 182 [2021-11-07 01:08:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:19,169 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 3343 transitions. [2021-11-07 01:08:19,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3343 transitions. [2021-11-07 01:08:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 01:08:19,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:19,174 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] [2021-11-07 01:08:19,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:19,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:19,399 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash 51593096, now seen corresponding path program 1 times [2021-11-07 01:08:19,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:19,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042180433] [2021-11-07 01:08:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:19,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:19,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:19,402 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:19,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:08:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:08:21,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:21,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:08:21,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:08:21,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:08:21,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:08:21,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:08:21,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:08:21,956 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:08:21,957 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 01:08:22,767 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:08:22,767 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 01:08:22,967 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 01:08:22,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:23,457 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 01:08:23,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:23,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042180433] [2021-11-07 01:08:23,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042180433] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:23,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:23,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:08:23,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446101772] [2021-11-07 01:08:23,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:08:23,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:08:23,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:08:23,459 INFO L87 Difference]: Start difference. First operand 2287 states and 3343 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:58,173 INFO L93 Difference]: Finished difference Result 5583 states and 8187 transitions. [2021-11-07 01:08:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:08:58,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2021-11-07 01:08:58,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:58,185 INFO L225 Difference]: With dead ends: 5583 [2021-11-07 01:08:58,185 INFO L226 Difference]: Without dead ends: 3564 [2021-11-07 01:08:58,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:08:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-11-07 01:08:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2466. [2021-11-07 01:08:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 1.4434077079107506) internal successors, (3558), 2465 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states 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 01:08:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 3558 transitions. [2021-11-07 01:08:58,377 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 3558 transitions. Word has length 182 [2021-11-07 01:08:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:58,378 INFO L470 AbstractCegarLoop]: Abstraction has 2466 states and 3558 transitions. [2021-11-07 01:08:58,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:08:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 3558 transitions. [2021-11-07 01:08:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-07 01:08:58,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:58,383 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] [2021-11-07 01:08:58,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:58,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:58,605 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:08:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:58,605 INFO L85 PathProgramCache]: Analyzing trace with hash 525669319, now seen corresponding path program 1 times [2021-11-07 01:08:58,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:58,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429633608] [2021-11-07 01:08:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:58,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:58,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:58,607 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:58,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:09:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:00,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:01,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:01,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:01,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:01,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:01,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:01,370 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:09:01,370 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 01:09:02,281 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:09:02,282 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 01:09:02,476 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 01:09:02,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:02,951 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 01:09:02,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:02,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429633608] [2021-11-07 01:09:02,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429633608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:02,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:02,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:02,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807083463] [2021-11-07 01:09:02,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:02,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:02,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:02,954 INFO L87 Difference]: Start difference. First operand 2466 states and 3558 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 01:09:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:35,507 INFO L93 Difference]: Finished difference Result 5748 states and 8359 transitions. [2021-11-07 01:09:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:09:35,513 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 183 [2021-11-07 01:09:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:35,527 INFO L225 Difference]: With dead ends: 5748 [2021-11-07 01:09:35,527 INFO L226 Difference]: Without dead ends: 3570 [2021-11-07 01:09:35,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:09:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2021-11-07 01:09:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 2498. [2021-11-07 01:09:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 1.434521425710853) internal successors, (3582), 2497 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states 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 01:09:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3582 transitions. [2021-11-07 01:09:35,716 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3582 transitions. Word has length 183 [2021-11-07 01:09:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:35,716 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 3582 transitions. [2021-11-07 01:09:35,717 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 01:09:35,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3582 transitions. [2021-11-07 01:09:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 01:09:35,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:35,733 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] [2021-11-07 01:09:35,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:35,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:35,952 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:09:35,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash -81246291, now seen corresponding path program 1 times [2021-11-07 01:09:35,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:35,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40891062] [2021-11-07 01:09:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:35,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:35,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:35,954 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:35,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:09:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:38,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:38,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:38,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:09:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:38,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:38,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:09:38,896 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:09:38,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:09:39,906 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:09:39,906 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 01:09:40,116 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 01:09:40,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:40,655 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 01:09:40,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:40,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40891062] [2021-11-07 01:09:40,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40891062] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:40,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:40,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:40,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262173358] [2021-11-07 01:09:40,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:40,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:40,659 INFO L87 Difference]: Start difference. First operand 2498 states and 3582 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 01:10:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:09,514 INFO L93 Difference]: Finished difference Result 5934 states and 8551 transitions. [2021-11-07 01:10:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:10:09,515 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 184 [2021-11-07 01:10:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:09,522 INFO L225 Difference]: With dead ends: 5934 [2021-11-07 01:10:09,523 INFO L226 Difference]: Without dead ends: 3733 [2021-11-07 01:10:09,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-11-07 01:10:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 2695. [2021-11-07 01:10:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2694 states have (on average 1.4161098737936155) internal successors, (3815), 2694 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states 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 01:10:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 3815 transitions. [2021-11-07 01:10:09,727 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 3815 transitions. Word has length 184 [2021-11-07 01:10:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:09,728 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 3815 transitions. [2021-11-07 01:10:09,728 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 01:10:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 3815 transitions. [2021-11-07 01:10:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-07 01:10:09,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:09,733 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] [2021-11-07 01:10:09,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:09,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:09,947 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1756566683, now seen corresponding path program 1 times [2021-11-07 01:10:09,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:09,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003528149] [2021-11-07 01:10:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:09,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:09,950 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:09,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:10:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:12,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:10:12,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:12,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:12,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:10:12,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:10:12,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:10:12,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:10:12,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:10:12,776 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:10:12,776 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 01:10:13,751 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:10:13,751 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 01:10:13,936 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 01:10:13,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:14,411 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 01:10:14,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:14,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003528149] [2021-11-07 01:10:14,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003528149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:14,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:14,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:14,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026284968] [2021-11-07 01:10:14,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:14,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:14,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:14,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:14,414 INFO L87 Difference]: Start difference. First operand 2695 states and 3815 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:40,444 INFO L93 Difference]: Finished difference Result 6572 states and 9354 transitions. [2021-11-07 01:10:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:10:40,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-07 01:10:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:40,449 INFO L225 Difference]: With dead ends: 6572 [2021-11-07 01:10:40,449 INFO L226 Difference]: Without dead ends: 3898 [2021-11-07 01:10:40,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-11-07 01:10:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 2879. [2021-11-07 01:10:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 1.3999305072967339) internal successors, (4029), 2878 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states 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 01:10:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 4029 transitions. [2021-11-07 01:10:40,691 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 4029 transitions. Word has length 187 [2021-11-07 01:10:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:40,691 INFO L470 AbstractCegarLoop]: Abstraction has 2879 states and 4029 transitions. [2021-11-07 01:10:40,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 4029 transitions. [2021-11-07 01:10:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 01:10:40,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:40,696 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] [2021-11-07 01:10:40,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:40,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:40,911 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:40,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1708017185, now seen corresponding path program 1 times [2021-11-07 01:10:40,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:40,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931077336] [2021-11-07 01:10:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:40,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:40,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:40,914 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:40,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:10:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:43,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:10:43,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:43,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:10:43,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:10:43,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:10:43,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:10:43,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:10:43,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:10:44,015 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:10:44,015 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 01:10:45,061 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:10:45,061 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 01:10:45,245 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 01:10:45,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:45,730 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 01:10:45,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:45,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931077336] [2021-11-07 01:10:45,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931077336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:45,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:45,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:45,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551113575] [2021-11-07 01:10:45,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:45,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:45,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:45,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:45,732 INFO L87 Difference]: Start difference. First operand 2879 states and 4029 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:14,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:14,801 INFO L93 Difference]: Finished difference Result 6738 states and 9520 transitions. [2021-11-07 01:11:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:11:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-07 01:11:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:14,805 INFO L225 Difference]: With dead ends: 6738 [2021-11-07 01:11:14,806 INFO L226 Difference]: Without dead ends: 3880 [2021-11-07 01:11:14,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-11-07 01:11:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 2923. [2021-11-07 01:11:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 1.393908281998631) internal successors, (4073), 2922 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states 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 01:11:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 4073 transitions. [2021-11-07 01:11:15,012 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 4073 transitions. Word has length 188 [2021-11-07 01:11:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:15,013 INFO L470 AbstractCegarLoop]: Abstraction has 2923 states and 4073 transitions. [2021-11-07 01:11:15,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 4073 transitions. [2021-11-07 01:11:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 01:11:15,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:15,016 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] [2021-11-07 01:11:15,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:15,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:15,217 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1435725805, now seen corresponding path program 1 times [2021-11-07 01:11:15,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:15,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526385182] [2021-11-07 01:11:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:15,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:15,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:15,219 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:15,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:11:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:17,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:17,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:17,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:17,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:17,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:17,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:18,308 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:11:18,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:11:19,496 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:11:19,497 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 01:11:19,676 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 01:11:19,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:20,168 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 01:11:20,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:20,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526385182] [2021-11-07 01:11:20,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526385182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:20,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:20,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:20,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696469653] [2021-11-07 01:11:20,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:20,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:20,170 INFO L87 Difference]: Start difference. First operand 2923 states and 4073 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 01:11:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:50,693 INFO L93 Difference]: Finished difference Result 6845 states and 9587 transitions. [2021-11-07 01:11:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:11:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 188 [2021-11-07 01:11:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:50,698 INFO L225 Difference]: With dead ends: 6845 [2021-11-07 01:11:50,698 INFO L226 Difference]: Without dead ends: 3943 [2021-11-07 01:11:50,700 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 01:11:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-11-07 01:11:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3048. [2021-11-07 01:11:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3047 states have (on average 1.3774204135214965) internal successors, (4197), 3047 states have internal predecessors, (4197), 0 states have call successors, (0), 0 states 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 01:11:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 4197 transitions. [2021-11-07 01:11:50,927 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 4197 transitions. Word has length 188 [2021-11-07 01:11:50,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:50,928 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 4197 transitions. [2021-11-07 01:11:50,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 01:11:50,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 4197 transitions. [2021-11-07 01:11:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 01:11:50,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:50,933 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] [2021-11-07 01:11:50,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:51,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:51,155 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash -904229234, now seen corresponding path program 1 times [2021-11-07 01:11:51,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:51,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590124845] [2021-11-07 01:11:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:51,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:51,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:51,157 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:51,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e01467-e14e-4af9-88ed-b0a6e0a02c76/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:11:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:53,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:53,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:53,973 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 01:11:53,977 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 01:11:53,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:53,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:53,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:53,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:53,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:11:53,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:53,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver