./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product16.cil.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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/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 47500ba035fb95802358be3af8dbcb0499051de1fc18562b910c6b7689271057 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:15:52,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:15:52,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:15:52,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:15:52,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:15:52,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:15:52,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:15:52,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:15:52,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:15:52,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:15:52,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:15:52,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:15:52,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:15:52,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:15:52,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:15:52,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:15:52,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:15:52,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:15:52,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:15:52,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:15:52,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:15:52,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:15:52,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:15:52,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:15:52,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:15:52,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:15:52,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:15:52,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:15:52,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:15:52,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:15:52,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:15:52,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:15:52,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:15:52,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:15:52,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:15:52,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:15:52,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:15:52,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:15:52,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:15:52,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:15:52,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:15:52,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:15:52,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:15:52,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:15:52,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:15:52,945 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:15:52,946 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:15:52,946 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:15:52,946 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:15:52,947 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:15:52,947 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:15:52,947 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:15:52,949 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:15:52,949 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:15:52,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:15:52,950 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:15:52,950 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:15:52,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:15:52,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:15:52,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:15:52,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:15:52,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:15:52,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:15:52,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:15:52,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:15:52,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:15:52,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:15:52,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:15:52,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:15:52,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:15:52,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:15:52,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:15:52,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:15:52,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:15:52,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:15:52,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:15:52,957 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:15:52,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:15:52,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:15:52,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:15:52,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:15:52,959 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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47500ba035fb95802358be3af8dbcb0499051de1fc18562b910c6b7689271057 [2021-11-07 01:15:53,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:15:53,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:15:53,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:15:53,368 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:15:53,369 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:15:53,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product16.cil.c [2021-11-07 01:15:53,475 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/data/824b18a90/b9ea12b14845499091af406bb03563ab/FLAGd29145009 [2021-11-07 01:15:54,254 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:15:54,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/sv-benchmarks/c/product-lines/email_spec9_product16.cil.c [2021-11-07 01:15:54,282 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/data/824b18a90/b9ea12b14845499091af406bb03563ab/FLAGd29145009 [2021-11-07 01:15:54,408 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/data/824b18a90/b9ea12b14845499091af406bb03563ab [2021-11-07 01:15:54,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:15:54,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:15:54,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:15:54,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:15:54,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:15:54,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:15:54" (1/1) ... [2021-11-07 01:15:54,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6edd709a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:15:54, skipping insertion in model container [2021-11-07 01:15:54,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:15:54" (1/1) ... [2021-11-07 01:15:54,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:15:54,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:15:55,323 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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/sv-benchmarks/c/product-lines/email_spec9_product16.cil.c[33283,33296] [2021-11-07 01:15:55,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:15:55,522 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 01:15:55,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3109e929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:15:55, skipping insertion in model container [2021-11-07 01:15:55,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:15:55,525 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:15:55,529 INFO L168 Benchmark]: Toolchain (without parser) took 1111.14 ms. Allocated memory is still 107.0 MB. Free memory was 64.7 MB in the beginning and 67.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:15:55,531 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 107.0 MB. Free memory is still 83.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:15:55,533 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1104.66 ms. Allocated memory is still 107.0 MB. Free memory was 64.5 MB in the beginning and 68.2 MB in the end (delta: -3.7 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:15:55,537 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 107.0 MB. Free memory is still 83.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1104.66 ms. Allocated memory is still 107.0 MB. Free memory was 64.5 MB in the beginning and 68.2 MB in the end (delta: -3.7 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 262]: 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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/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 47500ba035fb95802358be3af8dbcb0499051de1fc18562b910c6b7689271057 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:15:58,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:15:58,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:15:58,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:15:58,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:15:58,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:15:58,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:15:58,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:15:58,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:15:58,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:15:58,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:15:58,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:15:58,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:15:58,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:15:58,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:15:58,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:15:58,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:15:58,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:15:58,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:15:58,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:15:58,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:15:58,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:15:58,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:15:58,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:15:58,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:15:58,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:15:58,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:15:58,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:15:58,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:15:58,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:15:58,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:15:58,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:15:58,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:15:58,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:15:58,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:15:58,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:15:58,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:15:58,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:15:58,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:15:58,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:15:58,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:15:58,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:15:58,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:15:58,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:15:58,657 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:15:58,657 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:15:58,657 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:15:58,658 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:15:58,658 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:15:58,658 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:15:58,659 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:15:58,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:15:58,662 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:15:58,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:15:58,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:15:58,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:15:58,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:15:58,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:15:58,664 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:15:58,664 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:15:58,664 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:15:58,665 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:15:58,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:15:58,665 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:15:58,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:15:58,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:15:58,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:15:58,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:15:58,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:15:58,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:15:58,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:15:58,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:15:58,668 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:15:58,668 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:58,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:15:58,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:15:58,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:15:58,670 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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47500ba035fb95802358be3af8dbcb0499051de1fc18562b910c6b7689271057 [2021-11-07 01:15:59,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:15:59,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:15:59,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:15:59,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:15:59,239 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:15:59,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product16.cil.c [2021-11-07 01:15:59,330 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/data/8b29e68dd/46bd94d75a24474d9f022b45d951cc3d/FLAG299775209 [2021-11-07 01:16:00,401 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:16:00,404 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/sv-benchmarks/c/product-lines/email_spec9_product16.cil.c [2021-11-07 01:16:00,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/data/8b29e68dd/46bd94d75a24474d9f022b45d951cc3d/FLAG299775209 [2021-11-07 01:16:00,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/data/8b29e68dd/46bd94d75a24474d9f022b45d951cc3d [2021-11-07 01:16:00,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:16:00,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:16:00,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:16:00,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:16:00,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:16:00,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:16:00" (1/1) ... [2021-11-07 01:16:00,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4deaa1b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:00, skipping insertion in model container [2021-11-07 01:16:00,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:16:00" (1/1) ... [2021-11-07 01:16:00,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:16:01,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:16:01,680 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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/sv-benchmarks/c/product-lines/email_spec9_product16.cil.c[33283,33296] [2021-11-07 01:16:01,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:16:01,891 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:16:01,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:16:02,072 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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/sv-benchmarks/c/product-lines/email_spec9_product16.cil.c[33283,33296] [2021-11-07 01:16:02,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:16:02,161 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:16:02,261 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_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/sv-benchmarks/c/product-lines/email_spec9_product16.cil.c[33283,33296] [2021-11-07 01:16:02,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:16:02,382 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:16:02,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02 WrapperNode [2021-11-07 01:16:02,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:16:02,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:16:02,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:16:02,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:16:02,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (1/1) ... [2021-11-07 01:16:02,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (1/1) ... [2021-11-07 01:16:02,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:16:02,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:16:02,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:16:02,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:16:02,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (1/1) ... [2021-11-07 01:16:02,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (1/1) ... [2021-11-07 01:16:02,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (1/1) ... [2021-11-07 01:16:02,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (1/1) ... [2021-11-07 01:16:02,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (1/1) ... [2021-11-07 01:16:02,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (1/1) ... [2021-11-07 01:16:02,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (1/1) ... [2021-11-07 01:16:02,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:16:02,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:16:02,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:16:02,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:16:02,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (1/1) ... [2021-11-07 01:16:02,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:16:02,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:16:02,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:16:02,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:16:02,946 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:16:02,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:16:02,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:16:02,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:16:02,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:16:07,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:16:07,991 INFO L299 CfgBuilder]: Removed 295 assume(true) statements. [2021-11-07 01:16:07,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:16:07 BoogieIcfgContainer [2021-11-07 01:16:07,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:16:07,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:16:07,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:16:08,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:16:08,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:16:00" (1/3) ... [2021-11-07 01:16:08,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2a3166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:16:08, skipping insertion in model container [2021-11-07 01:16:08,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02" (2/3) ... [2021-11-07 01:16:08,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2a3166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:16:08, skipping insertion in model container [2021-11-07 01:16:08,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:16:07" (3/3) ... [2021-11-07 01:16:08,006 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product16.cil.c [2021-11-07 01:16:08,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:16:08,013 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:16:08,096 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:16:08,108 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 01:16:08,108 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:16:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 451 states, 448 states have (on average 1.7455357142857142) internal successors, (782), 450 states have internal predecessors, (782), 0 states have call successors, (0), 0 states 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 01:16:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:16:08,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:08,191 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:08,192 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:08,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 827013746, now seen corresponding path program 1 times [2021-11-07 01:16:08,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:08,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818085334] [2021-11-07 01:16:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:08,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:08,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:08,233 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:08,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:16:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:08,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:16:08,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:09,082 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 01:16:09,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:09,266 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 01:16:09,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:09,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818085334] [2021-11-07 01:16:09,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818085334] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:09,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:09,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:16:09,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303901156] [2021-11-07 01:16:09,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:16:09,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:09,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:16:09,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:16:09,308 INFO L87 Difference]: Start difference. First operand has 451 states, 448 states have (on average 1.7455357142857142) internal successors, (782), 450 states have internal predecessors, (782), 0 states have call successors, (0), 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 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 01:16:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:09,410 INFO L93 Difference]: Finished difference Result 660 states and 1123 transitions. [2021-11-07 01:16:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:16:09,421 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-07 01:16:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:09,449 INFO L225 Difference]: With dead ends: 660 [2021-11-07 01:16:09,455 INFO L226 Difference]: Without dead ends: 385 [2021-11-07 01:16:09,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:16:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-07 01:16:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-07 01:16:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.7493472584856398) internal successors, (670), 384 states have internal predecessors, (670), 0 states have call successors, (0), 0 states 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 01:16:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 670 transitions. [2021-11-07 01:16:09,578 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 670 transitions. Word has length 41 [2021-11-07 01:16:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:09,579 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 670 transitions. [2021-11-07 01:16:09,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 01:16:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 670 transitions. [2021-11-07 01:16:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:16:09,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:09,585 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:09,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:09,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:09,803 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash 935401701, now seen corresponding path program 1 times [2021-11-07 01:16:09,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:09,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660491191] [2021-11-07 01:16:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:09,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:09,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:09,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:09,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:16:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:10,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:16:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:10,510 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 01:16:10,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:10,665 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 01:16:10,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:10,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660491191] [2021-11-07 01:16:10,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660491191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:10,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:10,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:16:10,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180926043] [2021-11-07 01:16:10,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:16:10,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:10,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:16:10,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:10,674 INFO L87 Difference]: Start difference. First operand 385 states and 670 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 01:16:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:10,828 INFO L93 Difference]: Finished difference Result 1125 states and 1962 transitions. [2021-11-07 01:16:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:16:10,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 42 [2021-11-07 01:16:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:10,839 INFO L225 Difference]: With dead ends: 1125 [2021-11-07 01:16:10,840 INFO L226 Difference]: Without dead ends: 755 [2021-11-07 01:16:10,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 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 01:16:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-07 01:16:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 384. [2021-11-07 01:16:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 382 states have (on average 1.7408376963350785) internal successors, (665), 383 states have internal predecessors, (665), 0 states have call successors, (0), 0 states 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 01:16:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 665 transitions. [2021-11-07 01:16:10,920 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 665 transitions. Word has length 42 [2021-11-07 01:16:10,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:10,921 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 665 transitions. [2021-11-07 01:16:10,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 01:16:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 665 transitions. [2021-11-07 01:16:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:16:10,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:10,935 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:10,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:11,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:11,136 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1139727423, now seen corresponding path program 1 times [2021-11-07 01:16:11,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:11,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794941715] [2021-11-07 01:16:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:11,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:11,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:11,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:11,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:16:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:11,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:11,925 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 01:16:11,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:12,110 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 01:16:12,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:12,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794941715] [2021-11-07 01:16:12,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794941715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:12,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:12,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:16:12,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801425657] [2021-11-07 01:16:12,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:16:12,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:16:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:16:12,116 INFO L87 Difference]: Start difference. First operand 384 states and 665 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 01:16:12,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:12,429 INFO L93 Difference]: Finished difference Result 1453 states and 2522 transitions. [2021-11-07 01:16:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:16:12,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 44 [2021-11-07 01:16:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:12,443 INFO L225 Difference]: With dead ends: 1453 [2021-11-07 01:16:12,444 INFO L226 Difference]: Without dead ends: 1087 [2021-11-07 01:16:12,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:16:12,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-11-07 01:16:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 383. [2021-11-07 01:16:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 381 states have (on average 1.7349081364829397) internal successors, (661), 382 states have internal predecessors, (661), 0 states have call successors, (0), 0 states 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 01:16:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 661 transitions. [2021-11-07 01:16:12,488 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 661 transitions. Word has length 44 [2021-11-07 01:16:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:12,488 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 661 transitions. [2021-11-07 01:16:12,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 01:16:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 661 transitions. [2021-11-07 01:16:12,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:16:12,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:12,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:12,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:12,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:12,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:12,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2033694732, now seen corresponding path program 1 times [2021-11-07 01:16:12,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:12,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754390569] [2021-11-07 01:16:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:12,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:12,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:12,715 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:12,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:16:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:13,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:16:13,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:13,410 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 01:16:13,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:13,561 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 01:16:13,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:13,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754390569] [2021-11-07 01:16:13,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754390569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:13,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:13,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:16:13,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95845833] [2021-11-07 01:16:13,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:16:13,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:13,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:16:13,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:13,569 INFO L87 Difference]: Start difference. First operand 383 states and 661 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 01:16:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:13,653 INFO L93 Difference]: Finished difference Result 763 states and 1319 transitions. [2021-11-07 01:16:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:16:13,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 45 [2021-11-07 01:16:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:13,658 INFO L225 Difference]: With dead ends: 763 [2021-11-07 01:16:13,659 INFO L226 Difference]: Without dead ends: 388 [2021-11-07 01:16:13,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 01:16:13,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-07 01:16:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 383. [2021-11-07 01:16:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 381 states have (on average 1.727034120734908) internal successors, (658), 382 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 01:16:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 658 transitions. [2021-11-07 01:16:13,706 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 658 transitions. Word has length 45 [2021-11-07 01:16:13,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:13,706 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 658 transitions. [2021-11-07 01:16:13,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 01:16:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 658 transitions. [2021-11-07 01:16:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:16:13,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:13,709 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:13,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:13,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:13,926 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:13,926 INFO L85 PathProgramCache]: Analyzing trace with hash 99112535, now seen corresponding path program 1 times [2021-11-07 01:16:13,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:13,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018766386] [2021-11-07 01:16:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:13,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:13,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:13,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:13,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:16:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:14,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:14,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:14,626 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 01:16:14,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:14,840 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 01:16:14,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018766386] [2021-11-07 01:16:14,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018766386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:14,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:14,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:16:14,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561422820] [2021-11-07 01:16:14,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:16:14,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:16:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:16:14,843 INFO L87 Difference]: Start difference. First operand 383 states and 658 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 01:16:15,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:15,149 INFO L93 Difference]: Finished difference Result 1440 states and 2498 transitions. [2021-11-07 01:16:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:16:15,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 46 [2021-11-07 01:16:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:15,159 INFO L225 Difference]: With dead ends: 1440 [2021-11-07 01:16:15,160 INFO L226 Difference]: Without dead ends: 1083 [2021-11-07 01:16:15,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:16:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-11-07 01:16:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 383. [2021-11-07 01:16:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 381 states have (on average 1.7191601049868765) internal successors, (655), 382 states have internal predecessors, (655), 0 states have call successors, (0), 0 states 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 01:16:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 655 transitions. [2021-11-07 01:16:15,208 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 655 transitions. Word has length 46 [2021-11-07 01:16:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:15,209 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 655 transitions. [2021-11-07 01:16:15,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 01:16:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 655 transitions. [2021-11-07 01:16:15,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:16:15,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:15,211 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:15,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:15,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:15,433 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:15,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1995610556, now seen corresponding path program 1 times [2021-11-07 01:16:15,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:15,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365710718] [2021-11-07 01:16:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:15,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:15,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:15,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:15,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:16:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:15,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:16:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:16,172 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 01:16:16,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:16,339 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 01:16:16,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:16,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365710718] [2021-11-07 01:16:16,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365710718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:16,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:16,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:16:16,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322912218] [2021-11-07 01:16:16,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:16:16,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:16:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:16,343 INFO L87 Difference]: Start difference. First operand 383 states and 655 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 01:16:16,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:16,457 INFO L93 Difference]: Finished difference Result 883 states and 1512 transitions. [2021-11-07 01:16:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:16:16,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:16:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:16,464 INFO L225 Difference]: With dead ends: 883 [2021-11-07 01:16:16,464 INFO L226 Difference]: Without dead ends: 740 [2021-11-07 01:16:16,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-07 01:16:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 597. [2021-11-07 01:16:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 595 states have (on average 1.757983193277311) internal successors, (1046), 596 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 01:16:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1046 transitions. [2021-11-07 01:16:16,535 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1046 transitions. Word has length 48 [2021-11-07 01:16:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:16,536 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1046 transitions. [2021-11-07 01:16:16,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 01:16:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1046 transitions. [2021-11-07 01:16:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:16:16,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:16,538 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:16,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:16,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:16,754 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:16,755 INFO L85 PathProgramCache]: Analyzing trace with hash 776404619, now seen corresponding path program 1 times [2021-11-07 01:16:16,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:16,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730519005] [2021-11-07 01:16:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:16,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:16,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:16,758 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:16,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:16:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:17,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:16:17,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:17,509 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 01:16:17,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:17,701 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 01:16:17,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:17,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730519005] [2021-11-07 01:16:17,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730519005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:17,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:17,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:16:17,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598515498] [2021-11-07 01:16:17,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:16:17,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:17,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:16:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:17,706 INFO L87 Difference]: Start difference. First operand 597 states and 1046 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 01:16:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:17,814 INFO L93 Difference]: Finished difference Result 1415 states and 2486 transitions. [2021-11-07 01:16:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:16:17,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 01:16:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:17,822 INFO L225 Difference]: With dead ends: 1415 [2021-11-07 01:16:17,823 INFO L226 Difference]: Without dead ends: 902 [2021-11-07 01:16:17,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:17,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-11-07 01:16:17,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 759. [2021-11-07 01:16:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 757 states have (on average 1.7701453104359313) internal successors, (1340), 758 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states 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 01:16:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1340 transitions. [2021-11-07 01:16:17,930 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1340 transitions. Word has length 60 [2021-11-07 01:16:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:17,931 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1340 transitions. [2021-11-07 01:16:17,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 01:16:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1340 transitions. [2021-11-07 01:16:17,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:16:17,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:17,934 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:17,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:18,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:18,153 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1597015820, now seen corresponding path program 1 times [2021-11-07 01:16:18,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:18,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465527583] [2021-11-07 01:16:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:18,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:18,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:18,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:18,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:16:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:18,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:16:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:18,968 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 01:16:18,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:19,171 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 01:16:19,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:19,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465527583] [2021-11-07 01:16:19,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465527583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:19,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:19,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:16:19,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029512257] [2021-11-07 01:16:19,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:16:19,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:16:19,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:19,178 INFO L87 Difference]: Start difference. First operand 759 states and 1340 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 01:16:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:19,352 INFO L93 Difference]: Finished difference Result 1945 states and 3454 transitions. [2021-11-07 01:16:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:16:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-07 01:16:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:19,363 INFO L225 Difference]: With dead ends: 1945 [2021-11-07 01:16:19,363 INFO L226 Difference]: Without dead ends: 1274 [2021-11-07 01:16:19,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-07 01:16:19,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1131. [2021-11-07 01:16:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1129 states have (on average 1.787422497785651) internal successors, (2018), 1130 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states 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 01:16:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2018 transitions. [2021-11-07 01:16:19,489 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2018 transitions. Word has length 61 [2021-11-07 01:16:19,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:19,489 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 2018 transitions. [2021-11-07 01:16:19,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 01:16:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2018 transitions. [2021-11-07 01:16:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:16:19,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:19,493 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:16:19,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 01:16:19,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:19,726 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:19,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:19,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1569677220, now seen corresponding path program 1 times [2021-11-07 01:16:19,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:19,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248338688] [2021-11-07 01:16:19,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:19,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:19,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:19,729 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:19,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:16:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:16:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:20,562 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 01:16:20,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:20,755 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 01:16:20,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:20,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248338688] [2021-11-07 01:16:20,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248338688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:20,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:20,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:16:20,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935230748] [2021-11-07 01:16:20,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:16:20,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:20,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:16:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:20,757 INFO L87 Difference]: Start difference. First operand 1131 states and 2018 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:20,909 INFO L93 Difference]: Finished difference Result 2159 states and 3842 transitions. [2021-11-07 01:16:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:16:20,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:16:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:20,920 INFO L225 Difference]: With dead ends: 2159 [2021-11-07 01:16:20,921 INFO L226 Difference]: Without dead ends: 1274 [2021-11-07 01:16:20,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 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 01:16:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-07 01:16:21,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1131. [2021-11-07 01:16:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1129 states have (on average 1.7856510186005314) internal successors, (2016), 1130 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states 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 01:16:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2016 transitions. [2021-11-07 01:16:21,029 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2016 transitions. Word has length 62 [2021-11-07 01:16:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:21,029 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 2016 transitions. [2021-11-07 01:16:21,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2016 transitions. [2021-11-07 01:16:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:16:21,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:21,033 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:21,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:21,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:21,252 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:21,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1519612189, now seen corresponding path program 1 times [2021-11-07 01:16:21,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:21,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112279045] [2021-11-07 01:16:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:21,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:21,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:21,255 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:21,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:16:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:21,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:16:21,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:22,048 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 01:16:22,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:22,245 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 01:16:22,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:22,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112279045] [2021-11-07 01:16:22,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112279045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:22,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:22,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:16:22,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142546442] [2021-11-07 01:16:22,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:16:22,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:16:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:22,248 INFO L87 Difference]: Start difference. First operand 1131 states and 2016 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 01:16:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:22,447 INFO L93 Difference]: Finished difference Result 3033 states and 5437 transitions. [2021-11-07 01:16:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:16:22,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-07 01:16:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:22,465 INFO L225 Difference]: With dead ends: 3033 [2021-11-07 01:16:22,466 INFO L226 Difference]: Without dead ends: 1998 [2021-11-07 01:16:22,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-11-07 01:16:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1855. [2021-11-07 01:16:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1853 states have (on average 1.799784133837021) internal successors, (3335), 1854 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states 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 01:16:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 3335 transitions. [2021-11-07 01:16:22,651 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 3335 transitions. Word has length 62 [2021-11-07 01:16:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:22,651 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 3335 transitions. [2021-11-07 01:16:22,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 01:16:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 3335 transitions. [2021-11-07 01:16:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:16:22,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:22,656 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:22,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:22,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:22,876 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:22,876 INFO L85 PathProgramCache]: Analyzing trace with hash 887295882, now seen corresponding path program 1 times [2021-11-07 01:16:22,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:22,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615500457] [2021-11-07 01:16:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:22,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:22,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:22,880 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:22,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:16:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:23,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:16:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:23,772 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 01:16:23,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:23,955 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 01:16:23,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:23,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615500457] [2021-11-07 01:16:23,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615500457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:23,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:23,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:16:23,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387668570] [2021-11-07 01:16:23,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:16:23,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:23,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:16:23,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:23,958 INFO L87 Difference]: Start difference. First operand 1855 states and 3335 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 01:16:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:24,229 INFO L93 Difference]: Finished difference Result 4941 states and 8913 transitions. [2021-11-07 01:16:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:16:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-07 01:16:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:24,258 INFO L225 Difference]: With dead ends: 4941 [2021-11-07 01:16:24,258 INFO L226 Difference]: Without dead ends: 3216 [2021-11-07 01:16:24,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2021-11-07 01:16:24,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 3073. [2021-11-07 01:16:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3073 states, 3071 states have (on average 1.8065776619993488) internal successors, (5548), 3072 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states 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 01:16:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 5548 transitions. [2021-11-07 01:16:24,563 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 5548 transitions. Word has length 63 [2021-11-07 01:16:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:24,564 INFO L470 AbstractCegarLoop]: Abstraction has 3073 states and 5548 transitions. [2021-11-07 01:16:24,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 01:16:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 5548 transitions. [2021-11-07 01:16:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:16:24,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:24,577 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:24,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:24,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:24,782 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:24,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:24,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1846185428, now seen corresponding path program 1 times [2021-11-07 01:16:24,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:24,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650782908] [2021-11-07 01:16:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:24,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:24,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:24,785 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:24,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:16:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:25,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:16:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:25,578 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 01:16:25,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:25,754 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 01:16:25,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:25,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650782908] [2021-11-07 01:16:25,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650782908] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:25,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:25,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:16:25,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744771932] [2021-11-07 01:16:25,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:16:25,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:16:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:25,759 INFO L87 Difference]: Start difference. First operand 3073 states and 5548 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 01:16:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:26,221 INFO L93 Difference]: Finished difference Result 8311 states and 15035 transitions. [2021-11-07 01:16:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:16:26,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 01:16:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:26,266 INFO L225 Difference]: With dead ends: 8311 [2021-11-07 01:16:26,267 INFO L226 Difference]: Without dead ends: 5402 [2021-11-07 01:16:26,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-11-07 01:16:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 5259. [2021-11-07 01:16:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5259 states, 5257 states have (on average 1.8088263268023588) internal successors, (9509), 5258 states have internal predecessors, (9509), 0 states have call successors, (0), 0 states 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 01:16:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5259 states to 5259 states and 9509 transitions. [2021-11-07 01:16:26,748 INFO L78 Accepts]: Start accepts. Automaton has 5259 states and 9509 transitions. Word has length 64 [2021-11-07 01:16:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:26,749 INFO L470 AbstractCegarLoop]: Abstraction has 5259 states and 9509 transitions. [2021-11-07 01:16:26,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 01:16:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 5259 states and 9509 transitions. [2021-11-07 01:16:26,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:16:26,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:26,756 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:16:26,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:26,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:26,979 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:26,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:26,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2102746232, now seen corresponding path program 1 times [2021-11-07 01:16:26,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:26,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384818594] [2021-11-07 01:16:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:26,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:26,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:26,983 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:26,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:16:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:16:27,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:16:27,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:16:28,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:28,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384818594] [2021-11-07 01:16:28,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384818594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:28,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:28,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:16:28,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802479092] [2021-11-07 01:16:28,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:16:28,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:16:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:16:28,183 INFO L87 Difference]: Start difference. First operand 5259 states and 9509 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 01:16:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:31,434 INFO L93 Difference]: Finished difference Result 19676 states and 35617 transitions. [2021-11-07 01:16:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:16:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 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 65 [2021-11-07 01:16:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:31,515 INFO L225 Difference]: With dead ends: 19676 [2021-11-07 01:16:31,515 INFO L226 Difference]: Without dead ends: 14661 [2021-11-07 01:16:31,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:16:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14661 states. [2021-11-07 01:16:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14661 to 5209. [2021-11-07 01:16:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5209 states, 5207 states have (on average 1.7877856731323218) internal successors, (9309), 5208 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states 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 01:16:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5209 states to 5209 states and 9309 transitions. [2021-11-07 01:16:32,220 INFO L78 Accepts]: Start accepts. Automaton has 5209 states and 9309 transitions. Word has length 65 [2021-11-07 01:16:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:32,220 INFO L470 AbstractCegarLoop]: Abstraction has 5209 states and 9309 transitions. [2021-11-07 01:16:32,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 01:16:32,221 INFO L276 IsEmpty]: Start isEmpty. Operand 5209 states and 9309 transitions. [2021-11-07 01:16:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:16:32,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:32,227 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:32,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:32,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:32,442 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:32,443 INFO L85 PathProgramCache]: Analyzing trace with hash -552069511, now seen corresponding path program 1 times [2021-11-07 01:16:32,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:32,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286635294] [2021-11-07 01:16:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:32,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:32,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:32,447 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:32,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:16:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:33,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:16:33,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:33,421 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 01:16:33,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:33,620 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 01:16:33,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:33,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286635294] [2021-11-07 01:16:33,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286635294] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:33,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:33,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:16:33,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828707862] [2021-11-07 01:16:33,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:16:33,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:16:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:33,623 INFO L87 Difference]: Start difference. First operand 5209 states and 9309 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 01:16:34,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:34,154 INFO L93 Difference]: Finished difference Result 15048 states and 26941 transitions. [2021-11-07 01:16:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:16:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-07 01:16:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:34,187 INFO L225 Difference]: With dead ends: 15048 [2021-11-07 01:16:34,188 INFO L226 Difference]: Without dead ends: 10010 [2021-11-07 01:16:34,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:16:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10010 states. [2021-11-07 01:16:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10010 to 9867. [2021-11-07 01:16:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 9865 states have (on average 1.788748099341105) internal successors, (17646), 9866 states have internal predecessors, (17646), 0 states have call successors, (0), 0 states 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 01:16:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 17646 transitions. [2021-11-07 01:16:35,128 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 17646 transitions. Word has length 65 [2021-11-07 01:16:35,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:35,128 INFO L470 AbstractCegarLoop]: Abstraction has 9867 states and 17646 transitions. [2021-11-07 01:16:35,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 01:16:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 17646 transitions. [2021-11-07 01:16:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:16:35,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:35,138 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:35,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:35,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:35,355 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash -325631763, now seen corresponding path program 1 times [2021-11-07 01:16:35,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:35,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540656816] [2021-11-07 01:16:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:35,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:35,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:35,358 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:35,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:16:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:36,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:16:36,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:36,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:36,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:36,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540656816] [2021-11-07 01:16:36,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540656816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:36,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [554085052] [2021-11-07 01:16:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:36,574 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:36,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:36,575 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:36,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:16:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:37,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:16:37,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:16:37,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:16:38,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [554085052] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:38,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:16:38,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:16:38,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520183893] [2021-11-07 01:16:38,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:16:38,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:38,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:16:38,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:16:38,080 INFO L87 Difference]: Start difference. First operand 9867 states and 17646 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 01:16:38,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:38,827 INFO L93 Difference]: Finished difference Result 9968 states and 17808 transitions. [2021-11-07 01:16:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:16:38,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 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 66 [2021-11-07 01:16:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:38,867 INFO L225 Difference]: With dead ends: 9968 [2021-11-07 01:16:38,868 INFO L226 Difference]: Without dead ends: 9861 [2021-11-07 01:16:38,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:16:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9861 states. [2021-11-07 01:16:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9861 to 9861. [2021-11-07 01:16:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9861 states, 9860 states have (on average 1.7887423935091278) internal successors, (17637), 9860 states have internal predecessors, (17637), 0 states have call successors, (0), 0 states 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 01:16:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9861 states to 9861 states and 17637 transitions. [2021-11-07 01:16:39,599 INFO L78 Accepts]: Start accepts. Automaton has 9861 states and 17637 transitions. Word has length 66 [2021-11-07 01:16:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:39,600 INFO L470 AbstractCegarLoop]: Abstraction has 9861 states and 17637 transitions. [2021-11-07 01:16:39,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 01:16:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 9861 states and 17637 transitions. [2021-11-07 01:16:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 01:16:39,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:39,625 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:39,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:39,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:40,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:40,043 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:40,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:40,043 INFO L85 PathProgramCache]: Analyzing trace with hash 395041395, now seen corresponding path program 1 times [2021-11-07 01:16:40,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:40,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079096122] [2021-11-07 01:16:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:40,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:40,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:40,045 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:40,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:16:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:40,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:16:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:41,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:41,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:41,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079096122] [2021-11-07 01:16:41,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079096122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:41,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2045167966] [2021-11-07 01:16:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:41,569 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:41,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:41,570 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:41,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:16:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:16:42,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:16:43,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:16:44,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2045167966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:44,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:16:44,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:16:44,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352179668] [2021-11-07 01:16:44,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:16:44,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:44,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:16:44,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:16:44,052 INFO L87 Difference]: Start difference. First operand 9861 states and 17637 transitions. Second operand has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 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 01:17:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:01,374 INFO L93 Difference]: Finished difference Result 20901 states and 37091 transitions. [2021-11-07 01:17:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 01:17:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 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 97 [2021-11-07 01:17:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:01,429 INFO L225 Difference]: With dead ends: 20901 [2021-11-07 01:17:01,429 INFO L226 Difference]: Without dead ends: 20784 [2021-11-07 01:17:01,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 01:17:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20784 states. [2021-11-07 01:17:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20784 to 19594. [2021-11-07 01:17:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 1.7897208186597253) internal successors, (35066), 19593 states have internal predecessors, (35066), 0 states have call successors, (0), 0 states 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 01:17:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 35066 transitions. [2021-11-07 01:17:03,346 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 35066 transitions. Word has length 97 [2021-11-07 01:17:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:03,347 INFO L470 AbstractCegarLoop]: Abstraction has 19594 states and 35066 transitions. [2021-11-07 01:17:03,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 15 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 01:17:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 35066 transitions. [2021-11-07 01:17:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:17:03,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:03,388 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:03,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:17:03,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:03,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:03,795 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:03,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash -534947137, now seen corresponding path program 1 times [2021-11-07 01:17:03,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:03,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630782873] [2021-11-07 01:17:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:03,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:03,798 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:03,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:17:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:04,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:05,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:05,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:05,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630782873] [2021-11-07 01:17:05,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630782873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:05,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274513204] [2021-11-07 01:17:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:05,433 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:05,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:17:05,434 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:17:05,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:17:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:06,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:06,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:07,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274513204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:07,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:17:07,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:17:07,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128653548] [2021-11-07 01:17:07,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:17:07,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:17:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:17:07,145 INFO L87 Difference]: Start difference. First operand 19594 states and 35066 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:08,030 INFO L93 Difference]: Finished difference Result 19854 states and 35473 transitions. [2021-11-07 01:17:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:17:08,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 01:17:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:08,074 INFO L225 Difference]: With dead ends: 19854 [2021-11-07 01:17:08,075 INFO L226 Difference]: Without dead ends: 19621 [2021-11-07 01:17:08,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:17:08,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19621 states. [2021-11-07 01:17:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19621 to 19525. [2021-11-07 01:17:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19525 states, 19524 states have (on average 1.7899508297480025) internal successors, (34947), 19524 states have internal predecessors, (34947), 0 states have call successors, (0), 0 states 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 01:17:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19525 states to 19525 states and 34947 transitions. [2021-11-07 01:17:09,474 INFO L78 Accepts]: Start accepts. Automaton has 19525 states and 34947 transitions. Word has length 98 [2021-11-07 01:17:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:09,475 INFO L470 AbstractCegarLoop]: Abstraction has 19525 states and 34947 transitions. [2021-11-07 01:17:09,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 19525 states and 34947 transitions. [2021-11-07 01:17:09,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:17:09,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:09,515 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:17:09,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:09,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-07 01:17:09,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:09,938 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:09,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:09,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2064431701, now seen corresponding path program 1 times [2021-11-07 01:17:09,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:09,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3853490] [2021-11-07 01:17:09,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:09,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:09,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:09,940 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:09,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:17:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:11,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:11,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:11,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3853490] [2021-11-07 01:17:11,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3853490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:11,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1413623140] [2021-11-07 01:17:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:11,704 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:11,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:17:11,705 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:17:11,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:17:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:12,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:17:12,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:13,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:13,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1413623140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:13,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:17:13,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:17:13,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493452423] [2021-11-07 01:17:13,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:17:13,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:13,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:17:13,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:17:13,661 INFO L87 Difference]: Start difference. First operand 19525 states and 34947 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:16,793 INFO L93 Difference]: Finished difference Result 19751 states and 35306 transitions. [2021-11-07 01:17:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:17:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 01:17:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:16,833 INFO L225 Difference]: With dead ends: 19751 [2021-11-07 01:17:16,833 INFO L226 Difference]: Without dead ends: 19535 [2021-11-07 01:17:16,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:17:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19535 states. [2021-11-07 01:17:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19535 to 19513. [2021-11-07 01:17:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19513 states, 19512 states have (on average 1.7896678966789668) internal successors, (34920), 19512 states have internal predecessors, (34920), 0 states have call successors, (0), 0 states 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 01:17:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19513 states to 19513 states and 34920 transitions. [2021-11-07 01:17:18,124 INFO L78 Accepts]: Start accepts. Automaton has 19513 states and 34920 transitions. Word has length 99 [2021-11-07 01:17:18,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:18,124 INFO L470 AbstractCegarLoop]: Abstraction has 19513 states and 34920 transitions. [2021-11-07 01:17:18,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 19513 states and 34920 transitions. [2021-11-07 01:17:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:17:18,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:18,155 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:17:18,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:18,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:18,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:18,556 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:18,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1335898615, now seen corresponding path program 1 times [2021-11-07 01:17:18,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:18,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779904785] [2021-11-07 01:17:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:18,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:18,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:18,561 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:18,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:17:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:19,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:19,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:20,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:20,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779904785] [2021-11-07 01:17:20,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779904785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:20,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [981228154] [2021-11-07 01:17:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:20,275 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:20,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:17:20,276 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:17:20,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:17:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:21,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:17:21,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:22,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:23,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [981228154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:23,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:17:23,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:17:23,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731414906] [2021-11-07 01:17:23,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:17:23,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:23,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:17:23,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:17:23,183 INFO L87 Difference]: Start difference. First operand 19513 states and 34920 transitions. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:39,027 INFO L93 Difference]: Finished difference Result 40550 states and 72140 transitions. [2021-11-07 01:17:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 01:17:39,028 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 01:17:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:39,105 INFO L225 Difference]: With dead ends: 40550 [2021-11-07 01:17:39,105 INFO L226 Difference]: Without dead ends: 40346 [2021-11-07 01:17:39,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=501, Invalid=1479, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 01:17:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40346 states. [2021-11-07 01:17:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40346 to 38750. [2021-11-07 01:17:41,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38750 states, 38749 states have (on average 1.7903945908281504) internal successors, (69376), 38749 states have internal predecessors, (69376), 0 states have call successors, (0), 0 states 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 01:17:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38750 states to 38750 states and 69376 transitions. [2021-11-07 01:17:41,538 INFO L78 Accepts]: Start accepts. Automaton has 38750 states and 69376 transitions. Word has length 99 [2021-11-07 01:17:41,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:41,538 INFO L470 AbstractCegarLoop]: Abstraction has 38750 states and 69376 transitions. [2021-11-07 01:17:41,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 38750 states and 69376 transitions. [2021-11-07 01:17:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:17:41,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:41,581 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:17:41,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:41,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:41,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:41,982 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:41,983 INFO L85 PathProgramCache]: Analyzing trace with hash -442412277, now seen corresponding path program 1 times [2021-11-07 01:17:41,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:41,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139118337] [2021-11-07 01:17:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:41,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:41,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:41,985 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:42,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:17:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:43,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:43,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:43,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:43,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:43,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139118337] [2021-11-07 01:17:43,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139118337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:43,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1115355413] [2021-11-07 01:17:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:43,984 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:43,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:17:43,985 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:17:43,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:17:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:45,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:17:45,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:46,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:46,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1115355413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:46,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:17:46,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:17:46,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119859359] [2021-11-07 01:17:46,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:17:46,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:46,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:17:46,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:17:46,406 INFO L87 Difference]: Start difference. First operand 38750 states and 69376 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:48,943 INFO L93 Difference]: Finished difference Result 40617 states and 72295 transitions. [2021-11-07 01:17:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:17:48,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 01:17:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:49,018 INFO L225 Difference]: With dead ends: 40617 [2021-11-07 01:17:49,018 INFO L226 Difference]: Without dead ends: 39575 [2021-11-07 01:17:49,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:17:49,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39575 states. [2021-11-07 01:17:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39575 to 38806. [2021-11-07 01:17:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38806 states, 38805 states have (on average 1.7898724391186702) internal successors, (69456), 38805 states have internal predecessors, (69456), 0 states have call successors, (0), 0 states 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 01:17:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38806 states to 38806 states and 69456 transitions. [2021-11-07 01:17:51,479 INFO L78 Accepts]: Start accepts. Automaton has 38806 states and 69456 transitions. Word has length 99 [2021-11-07 01:17:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:51,479 INFO L470 AbstractCegarLoop]: Abstraction has 38806 states and 69456 transitions. [2021-11-07 01:17:51,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 38806 states and 69456 transitions. [2021-11-07 01:17:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:17:51,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:51,536 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:17:51,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-07 01:17:51,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:51,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:51,943 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash 548455549, now seen corresponding path program 1 times [2021-11-07 01:17:51,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:51,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326731298] [2021-11-07 01:17:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:51,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:51,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:51,946 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:51,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:17:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:53,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:53,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:53,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:54,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:54,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326731298] [2021-11-07 01:17:54,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326731298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:54,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1300876016] [2021-11-07 01:17:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:54,032 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:17:54,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:17:54,033 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:17:54,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:17:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:55,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:17:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:56,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:17:56,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1300876016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:56,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:17:56,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:17:56,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007684595] [2021-11-07 01:17:56,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:17:56,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:56,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:17:56,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:17:56,573 INFO L87 Difference]: Start difference. First operand 38806 states and 69456 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 01:17:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:59,153 INFO L93 Difference]: Finished difference Result 39334 states and 70280 transitions. [2021-11-07 01:17:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:17:59,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 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 100 [2021-11-07 01:17:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:59,219 INFO L225 Difference]: With dead ends: 39334 [2021-11-07 01:17:59,219 INFO L226 Difference]: Without dead ends: 38979 [2021-11-07 01:17:59,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:17:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38979 states. [2021-11-07 01:18:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38979 to 38742. [2021-11-07 01:18:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38742 states, 38741 states have (on average 1.7900415580392866) internal successors, (69348), 38741 states have internal predecessors, (69348), 0 states have call successors, (0), 0 states 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 01:18:01,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38742 states to 38742 states and 69348 transitions. [2021-11-07 01:18:01,787 INFO L78 Accepts]: Start accepts. Automaton has 38742 states and 69348 transitions. Word has length 100 [2021-11-07 01:18:01,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:01,787 INFO L470 AbstractCegarLoop]: Abstraction has 38742 states and 69348 transitions. [2021-11-07 01:18:01,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 01:18:01,787 INFO L276 IsEmpty]: Start isEmpty. Operand 38742 states and 69348 transitions. [2021-11-07 01:18:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:18:01,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:01,846 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:18:01,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:02,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-07 01:18:02,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:02,268 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:18:02,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash 277350465, now seen corresponding path program 1 times [2021-11-07 01:18:02,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:02,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397921806] [2021-11-07 01:18:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:02,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:02,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:02,270 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:02,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:18:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:03,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:18:03,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:04,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:04,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:04,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397921806] [2021-11-07 01:18:04,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397921806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:04,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [791635283] [2021-11-07 01:18:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:04,434 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:04,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:04,451 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:04,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:18:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:06,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:18:06,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:06,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:06,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [791635283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:06,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:18:06,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:18:06,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798533834] [2021-11-07 01:18:06,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:18:06,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:06,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:18:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:18:06,853 INFO L87 Difference]: Start difference. First operand 38742 states and 69348 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:18:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:09,148 INFO L93 Difference]: Finished difference Result 39145 states and 69969 transitions. [2021-11-07 01:18:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:18:09,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 102 [2021-11-07 01:18:09,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:09,215 INFO L225 Difference]: With dead ends: 39145 [2021-11-07 01:18:09,216 INFO L226 Difference]: Without dead ends: 38769 [2021-11-07 01:18:09,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:18:09,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38769 states. [2021-11-07 01:18:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38769 to 38739. [2021-11-07 01:18:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38739 states, 38738 states have (on average 1.789947854819557) internal successors, (69339), 38738 states have internal predecessors, (69339), 0 states have call successors, (0), 0 states 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 01:18:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38739 states to 38739 states and 69339 transitions. [2021-11-07 01:18:11,748 INFO L78 Accepts]: Start accepts. Automaton has 38739 states and 69339 transitions. Word has length 102 [2021-11-07 01:18:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:11,748 INFO L470 AbstractCegarLoop]: Abstraction has 38739 states and 69339 transitions. [2021-11-07 01:18:11,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:18:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 38739 states and 69339 transitions. [2021-11-07 01:18:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:18:11,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:11,802 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:18:11,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:12,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:12,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:12,203 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:18:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:12,203 INFO L85 PathProgramCache]: Analyzing trace with hash -153787264, now seen corresponding path program 1 times [2021-11-07 01:18:12,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:12,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320980359] [2021-11-07 01:18:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:12,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:12,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:12,206 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:12,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:18:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:13,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:18:13,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:14,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:14,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:14,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320980359] [2021-11-07 01:18:14,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320980359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:14,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [795950647] [2021-11-07 01:18:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:14,568 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:14,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:14,569 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:14,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 01:18:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:16,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:18:16,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:17,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:18:17,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [795950647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:17,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:18:17,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:18:17,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143540598] [2021-11-07 01:18:17,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:18:17,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:17,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:18:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:18:17,334 INFO L87 Difference]: Start difference. First operand 38739 states and 69339 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:18:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:19,774 INFO L93 Difference]: Finished difference Result 39249 states and 70128 transitions. [2021-11-07 01:18:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:18:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 102 [2021-11-07 01:18:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:19,840 INFO L225 Difference]: With dead ends: 39249 [2021-11-07 01:18:19,841 INFO L226 Difference]: Without dead ends: 38848 [2021-11-07 01:18:19,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:18:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38848 states. [2021-11-07 01:18:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38848 to 38497. [2021-11-07 01:18:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38497 states, 38496 states have (on average 1.785795926849543) internal successors, (68746), 38496 states have internal predecessors, (68746), 0 states have call successors, (0), 0 states 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 01:18:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38497 states to 38497 states and 68746 transitions. [2021-11-07 01:18:22,645 INFO L78 Accepts]: Start accepts. Automaton has 38497 states and 68746 transitions. Word has length 102 [2021-11-07 01:18:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:22,646 INFO L470 AbstractCegarLoop]: Abstraction has 38497 states and 68746 transitions. [2021-11-07 01:18:22,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 01:18:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 38497 states and 68746 transitions. [2021-11-07 01:18:22,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 01:18:22,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:22,694 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:18:22,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:22,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:23,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:18:23,104 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:18:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1613924456, now seen corresponding path program 1 times [2021-11-07 01:18:23,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:23,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403355549] [2021-11-07 01:18:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:23,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:23,107 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:23,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f0ec73e-03d2-4bdf-9740-86d0001b7ddb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:18:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:24,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:18:24,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:18:25,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:18:25,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:25,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403355549] [2021-11-07 01:18:25,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403355549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:25,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:18:25,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:18:25,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716098239] [2021-11-07 01:18:25,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:18:25,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:25,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:18:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:18:25,460 INFO L87 Difference]: Start difference. First operand 38497 states and 68746 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 01:18:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:34,318 INFO L93 Difference]: Finished difference Result 141114 states and 250686 transitions. [2021-11-07 01:18:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:18:34,318 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 109 [2021-11-07 01:18:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:34,551 INFO L225 Difference]: With dead ends: 141114 [2021-11-07 01:18:34,551 INFO L226 Difference]: Without dead ends: 102866 [2021-11-07 01:18:34,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:18:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102866 states.