./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6560568361eacef24363f4e5a58f5226b4c8bc2851167e042d4f8ce61eb0aa48 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:05:13,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:05:13,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:05:13,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:05:13,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:05:13,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:05:13,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:05:13,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:05:13,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:05:13,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:05:13,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:05:13,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:05:13,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:05:13,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:05:13,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:05:13,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:05:13,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:05:13,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:05:13,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:05:13,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:05:13,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:05:13,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:05:13,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:05:13,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:05:13,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:05:13,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:05:13,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:05:13,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:05:13,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:05:13,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:05:13,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:05:13,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:05:13,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:05:13,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:05:13,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:05:13,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:05:13,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:05:13,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:05:13,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:05:13,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:05:13,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:05:13,911 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 20:05:13,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:05:13,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:05:13,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:05:13,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:05:13,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:05:13,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:05:13,938 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:05:13,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:05:13,938 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:05:13,938 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:05:13,939 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:05:13,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:05:13,939 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:05:13,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:05:13,939 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:05:13,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:05:13,940 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:05:13,940 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:05:13,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:05:13,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:05:13,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:05:13,941 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:05:13,942 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:05:13,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:05:13,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:05:13,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:05:13,942 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:05:13,943 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:05:13,943 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:05:13,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:05:13,943 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:05:13,943 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:05:13,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:05:13,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:05:13,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:05:13,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:05:13,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:05:13,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:05:13,945 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:05:13,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:05:13,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:05:13,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:05:13,945 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_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6560568361eacef24363f4e5a58f5226b4c8bc2851167e042d4f8ce61eb0aa48 [2021-11-25 20:05:14,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:05:14,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:05:14,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:05:14,233 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:05:14,234 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:05:14,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i [2021-11-25 20:05:14,311 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/data/08962d5e4/c79dde4dcdf7448f91c1923880827afe/FLAG16110cfe5 [2021-11-25 20:05:15,005 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:05:15,006 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i [2021-11-25 20:05:15,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/data/08962d5e4/c79dde4dcdf7448f91c1923880827afe/FLAG16110cfe5 [2021-11-25 20:05:15,195 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/data/08962d5e4/c79dde4dcdf7448f91c1923880827afe [2021-11-25 20:05:15,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:05:15,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:05:15,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:05:15,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:05:15,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:05:15,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:05:15" (1/1) ... [2021-11-25 20:05:15,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f087ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:15, skipping insertion in model container [2021-11-25 20:05:15,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:05:15" (1/1) ... [2021-11-25 20:05:15,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:05:15,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:05:15,772 WARN L230 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_8df443f6-312d-4a48-a62a-f4758216066f/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[33021,33034] [2021-11-25 20:05:15,916 WARN L230 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_8df443f6-312d-4a48-a62a-f4758216066f/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[44590,44603] [2021-11-25 20:05:15,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:05:15,945 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) [2021-11-25 20:05:15,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@25c5dbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:15, skipping insertion in model container [2021-11-25 20:05:15,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:05:15,946 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 20:05:15,949 INFO L158 Benchmark]: Toolchain (without parser) took 748.99ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 75.0MB in the beginning and 96.5MB in the end (delta: -21.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:05:15,950 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory is still 57.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:05:15,951 INFO L158 Benchmark]: CACSL2BoogieTranslator took 745.86ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 74.8MB in the beginning and 96.5MB in the end (delta: -21.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:05:15,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory is still 57.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 745.86ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 74.8MB in the beginning and 96.5MB in the end (delta: -21.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 736]: 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_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6560568361eacef24363f4e5a58f5226b4c8bc2851167e042d4f8ce61eb0aa48 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:05:18,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:05:18,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:05:18,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:05:18,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:05:18,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:05:18,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:05:18,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:05:18,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:05:18,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:05:18,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:05:18,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:05:18,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:05:18,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:05:18,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:05:18,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:05:18,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:05:18,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:05:18,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:05:18,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:05:18,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:05:18,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:05:18,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:05:18,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:05:18,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:05:18,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:05:18,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:05:18,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:05:18,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:05:18,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:05:18,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:05:18,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:05:18,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:05:18,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:05:18,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:05:18,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:05:18,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:05:18,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:05:18,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:05:18,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:05:18,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:05:18,690 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 20:05:18,746 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:05:18,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:05:18,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:05:18,747 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:05:18,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:05:18,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:05:18,748 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:05:18,749 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:05:18,749 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:05:18,749 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:05:18,750 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:05:18,750 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:05:18,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:05:18,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:05:18,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:05:18,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:05:18,752 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:05:18,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:05:18,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:05:18,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:05:18,753 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:05:18,753 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:05:18,754 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:05:18,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:05:18,754 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:05:18,754 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 20:05:18,755 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 20:05:18,755 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:05:18,755 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:05:18,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:05:18,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 20:05:18,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:05:18,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:05:18,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:05:18,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:05:18,757 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 20:05:18,758 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 20:05:18,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:05:18,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:05:18,758 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_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6560568361eacef24363f4e5a58f5226b4c8bc2851167e042d4f8ce61eb0aa48 [2021-11-25 20:05:19,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:05:19,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:05:19,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:05:19,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:05:19,176 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:05:19,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i [2021-11-25 20:05:19,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/data/62fbec0a4/6049a3f261c14027acb84ee3db7f7bde/FLAGfe9ff62fc [2021-11-25 20:05:20,043 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:05:20,045 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i [2021-11-25 20:05:20,075 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/data/62fbec0a4/6049a3f261c14027acb84ee3db7f7bde/FLAGfe9ff62fc [2021-11-25 20:05:20,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/data/62fbec0a4/6049a3f261c14027acb84ee3db7f7bde [2021-11-25 20:05:20,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:05:20,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:05:20,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:05:20,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:05:20,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:05:20,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:05:20" (1/1) ... [2021-11-25 20:05:20,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46c03a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:20, skipping insertion in model container [2021-11-25 20:05:20,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:05:20" (1/1) ... [2021-11-25 20:05:20,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:05:20,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:05:20,793 WARN L230 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_8df443f6-312d-4a48-a62a-f4758216066f/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[33021,33034] [2021-11-25 20:05:20,971 WARN L230 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_8df443f6-312d-4a48-a62a-f4758216066f/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[44590,44603] [2021-11-25 20:05:20,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:05:21,010 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 20:05:21,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:05:21,090 WARN L230 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_8df443f6-312d-4a48-a62a-f4758216066f/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[33021,33034] [2021-11-25 20:05:21,156 WARN L230 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_8df443f6-312d-4a48-a62a-f4758216066f/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[44590,44603] [2021-11-25 20:05:21,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:05:21,187 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:05:21,217 WARN L230 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_8df443f6-312d-4a48-a62a-f4758216066f/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[33021,33034] [2021-11-25 20:05:21,278 WARN L230 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_8df443f6-312d-4a48-a62a-f4758216066f/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[44590,44603] [2021-11-25 20:05:21,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:05:21,336 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:05:21,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21 WrapperNode [2021-11-25 20:05:21,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:05:21,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:05:21,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:05:21,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:05:21,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (1/1) ... [2021-11-25 20:05:21,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (1/1) ... [2021-11-25 20:05:21,456 INFO L137 Inliner]: procedures = 180, calls = 336, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1205 [2021-11-25 20:05:21,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:05:21,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:05:21,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:05:21,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:05:21,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (1/1) ... [2021-11-25 20:05:21,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (1/1) ... [2021-11-25 20:05:21,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (1/1) ... [2021-11-25 20:05:21,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (1/1) ... [2021-11-25 20:05:21,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (1/1) ... [2021-11-25 20:05:21,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (1/1) ... [2021-11-25 20:05:21,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (1/1) ... [2021-11-25 20:05:21,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:05:21,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:05:21,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:05:21,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:05:21,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (1/1) ... [2021-11-25 20:05:21,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:05:21,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:21,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:05:21,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:05:21,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 20:05:21,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 20:05:21,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:05:21,731 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:05:21,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 20:05:21,732 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 20:05:21,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:05:21,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:05:21,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:05:21,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:05:21,733 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 20:05:21,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:05:21,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:05:21,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 20:05:21,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 20:05:21,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:05:21,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:05:22,031 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:05:22,033 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:05:22,037 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 20:05:28,064 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:05:28,082 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:05:28,082 INFO L301 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-25 20:05:28,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:05:28 BoogieIcfgContainer [2021-11-25 20:05:28,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:05:28,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:05:28,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:05:28,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:05:28,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:05:20" (1/3) ... [2021-11-25 20:05:28,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b49d8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:05:28, skipping insertion in model container [2021-11-25 20:05:28,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:21" (2/3) ... [2021-11-25 20:05:28,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b49d8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:05:28, skipping insertion in model container [2021-11-25 20:05:28,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:05:28" (3/3) ... [2021-11-25 20:05:28,103 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test3-2.i [2021-11-25 20:05:28,109 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:05:28,109 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 639 error locations. [2021-11-25 20:05:28,161 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:05:28,169 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-25 20:05:28,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 639 error locations. [2021-11-25 20:05:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 1271 states, 624 states have (on average 2.2580128205128207) internal successors, (1409), 1265 states have internal predecessors, (1409), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:28,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 20:05:28,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:28,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 20:05:28,214 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:28,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:28,220 INFO L85 PathProgramCache]: Analyzing trace with hash 38794, now seen corresponding path program 1 times [2021-11-25 20:05:28,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:28,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457806282] [2021-11-25 20:05:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:28,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:28,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:28,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:28,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 20:05:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:28,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:05:28,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:28,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:05:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:28,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:28,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:28,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457806282] [2021-11-25 20:05:28,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457806282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:28,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:28,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:05:28,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541687826] [2021-11-25 20:05:28,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:28,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:05:28,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:05:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:28,620 INFO L87 Difference]: Start difference. First operand has 1271 states, 624 states have (on average 2.2580128205128207) internal successors, (1409), 1265 states have internal predecessors, (1409), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:31,466 INFO L93 Difference]: Finished difference Result 1443 states and 1528 transitions. [2021-11-25 20:05:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:05:31,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-25 20:05:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:31,500 INFO L225 Difference]: With dead ends: 1443 [2021-11-25 20:05:31,501 INFO L226 Difference]: Without dead ends: 1441 [2021-11-25 20:05:31,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:31,509 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 1181 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:31,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 928 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 20:05:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-11-25 20:05:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1256. [2021-11-25 20:05:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 624 states have (on average 2.110576923076923) internal successors, (1317), 1250 states have internal predecessors, (1317), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1333 transitions. [2021-11-25 20:05:31,669 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1333 transitions. Word has length 3 [2021-11-25 20:05:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:31,669 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1333 transitions. [2021-11-25 20:05:31,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1333 transitions. [2021-11-25 20:05:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 20:05:31,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:31,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 20:05:31,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:31,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:31,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash 38795, now seen corresponding path program 1 times [2021-11-25 20:05:31,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:31,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187351317] [2021-11-25 20:05:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:31,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:31,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:31,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 20:05:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:32,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:05:32,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:32,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:05:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:32,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:32,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:32,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187351317] [2021-11-25 20:05:32,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187351317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:32,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:32,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:05:32,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860202982] [2021-11-25 20:05:32,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:32,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:05:32,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:05:32,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:32,125 INFO L87 Difference]: Start difference. First operand 1256 states and 1333 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:36,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:36,188 INFO L93 Difference]: Finished difference Result 1865 states and 1993 transitions. [2021-11-25 20:05:36,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:05:36,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-25 20:05:36,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:36,200 INFO L225 Difference]: With dead ends: 1865 [2021-11-25 20:05:36,201 INFO L226 Difference]: Without dead ends: 1865 [2021-11-25 20:05:36,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:36,202 INFO L933 BasicCegarLoop]: 1047 mSDtfsCounter, 650 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:36,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 1750 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 20:05:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-11-25 20:05:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1456. [2021-11-25 20:05:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 825 states have (on average 2.0957575757575757) internal successors, (1729), 1450 states have internal predecessors, (1729), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 1745 transitions. [2021-11-25 20:05:36,251 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 1745 transitions. Word has length 3 [2021-11-25 20:05:36,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:36,251 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 1745 transitions. [2021-11-25 20:05:36,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 1745 transitions. [2021-11-25 20:05:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:05:36,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:36,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:36,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:36,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:36,465 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:36,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1466973012, now seen corresponding path program 1 times [2021-11-25 20:05:36,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:36,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054423585] [2021-11-25 20:05:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:36,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:36,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:36,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:36,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 20:05:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:36,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:05:36,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:36,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:05:36,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:05:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:05:36,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:05:36,842 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:05:36,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-25 20:05:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:36,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:36,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:36,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054423585] [2021-11-25 20:05:36,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054423585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:36,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:36,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:05:36,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897359414] [2021-11-25 20:05:36,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:36,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:05:36,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:05:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:05:36,876 INFO L87 Difference]: Start difference. First operand 1456 states and 1745 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:41,045 INFO L93 Difference]: Finished difference Result 1634 states and 1934 transitions. [2021-11-25 20:05:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:05:41,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-25 20:05:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:41,058 INFO L225 Difference]: With dead ends: 1634 [2021-11-25 20:05:41,058 INFO L226 Difference]: Without dead ends: 1634 [2021-11-25 20:05:41,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:05:41,060 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 2629 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2637 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:41,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2637 Valid, 535 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 20:05:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-11-25 20:05:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1245. [2021-11-25 20:05:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 624 states have (on average 2.0913461538461537) internal successors, (1305), 1239 states have internal predecessors, (1305), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1321 transitions. [2021-11-25 20:05:41,107 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1321 transitions. Word has length 7 [2021-11-25 20:05:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:41,107 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 1321 transitions. [2021-11-25 20:05:41,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1321 transitions. [2021-11-25 20:05:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:05:41,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:41,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:41,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-25 20:05:41,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:41,330 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476910, now seen corresponding path program 1 times [2021-11-25 20:05:41,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:41,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86786039] [2021-11-25 20:05:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:41,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:41,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:41,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:41,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 20:05:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:41,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:05:41,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:41,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:05:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:41,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:41,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:41,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86786039] [2021-11-25 20:05:41,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86786039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:41,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:41,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:05:41,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961000763] [2021-11-25 20:05:41,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:41,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:05:41,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:41,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:05:41,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:41,549 INFO L87 Difference]: Start difference. First operand 1245 states and 1321 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:44,330 INFO L93 Difference]: Finished difference Result 1572 states and 1677 transitions. [2021-11-25 20:05:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:05:44,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-25 20:05:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:44,344 INFO L225 Difference]: With dead ends: 1572 [2021-11-25 20:05:44,344 INFO L226 Difference]: Without dead ends: 1572 [2021-11-25 20:05:44,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:44,346 INFO L933 BasicCegarLoop]: 1163 mSDtfsCounter, 990 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:44,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 1509 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 20:05:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-11-25 20:05:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1196. [2021-11-25 20:05:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 624 states have (on average 2.0128205128205128) internal successors, (1256), 1190 states have internal predecessors, (1256), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1272 transitions. [2021-11-25 20:05:44,386 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1272 transitions. Word has length 8 [2021-11-25 20:05:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:44,387 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 1272 transitions. [2021-11-25 20:05:44,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1272 transitions. [2021-11-25 20:05:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:05:44,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:44,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:44,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:44,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:44,602 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476909, now seen corresponding path program 1 times [2021-11-25 20:05:44,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:44,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625750917] [2021-11-25 20:05:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:44,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:44,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:44,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:44,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 20:05:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:44,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:05:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:44,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:05:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:44,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:44,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:44,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625750917] [2021-11-25 20:05:44,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625750917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:44,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:44,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:05:44,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988411739] [2021-11-25 20:05:44,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:44,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:05:44,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:05:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:44,859 INFO L87 Difference]: Start difference. First operand 1196 states and 1272 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:48,254 INFO L93 Difference]: Finished difference Result 1650 states and 1758 transitions. [2021-11-25 20:05:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:05:48,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-25 20:05:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:48,265 INFO L225 Difference]: With dead ends: 1650 [2021-11-25 20:05:48,266 INFO L226 Difference]: Without dead ends: 1650 [2021-11-25 20:05:48,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:48,267 INFO L933 BasicCegarLoop]: 1372 mSDtfsCounter, 673 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:48,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 1914 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 20:05:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-11-25 20:05:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1218. [2021-11-25 20:05:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 656 states have (on average 2.0) internal successors, (1312), 1212 states have internal predecessors, (1312), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1328 transitions. [2021-11-25 20:05:48,307 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1328 transitions. Word has length 8 [2021-11-25 20:05:48,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:48,308 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1328 transitions. [2021-11-25 20:05:48,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1328 transitions. [2021-11-25 20:05:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:05:48,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:48,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:48,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:48,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:48,524 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr526REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash 871377621, now seen corresponding path program 1 times [2021-11-25 20:05:48,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:48,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642296412] [2021-11-25 20:05:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:48,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:48,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:48,527 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:48,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 20:05:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:05:48,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:48,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:48,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:48,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642296412] [2021-11-25 20:05:48,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642296412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:48,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:48,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:05:48,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318045171] [2021-11-25 20:05:48,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:48,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:05:48,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:48,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:05:48,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:05:48,824 INFO L87 Difference]: Start difference. First operand 1218 states and 1328 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:49,865 INFO L93 Difference]: Finished difference Result 1864 states and 2017 transitions. [2021-11-25 20:05:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:05:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-25 20:05:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:49,874 INFO L225 Difference]: With dead ends: 1864 [2021-11-25 20:05:49,875 INFO L226 Difference]: Without dead ends: 1864 [2021-11-25 20:05:49,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:05:49,876 INFO L933 BasicCegarLoop]: 1392 mSDtfsCounter, 753 mSDsluCounter, 2347 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 3739 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:49,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 3739 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:05:49,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-11-25 20:05:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1462. [2021-11-25 20:05:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 900 states have (on average 1.9677777777777778) internal successors, (1771), 1456 states have internal predecessors, (1771), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1787 transitions. [2021-11-25 20:05:49,912 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1787 transitions. Word has length 11 [2021-11-25 20:05:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:49,913 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 1787 transitions. [2021-11-25 20:05:49,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:49,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1787 transitions. [2021-11-25 20:05:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 20:05:49,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:49,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:49,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:50,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:50,126 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -702153283, now seen corresponding path program 1 times [2021-11-25 20:05:50,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:50,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723198126] [2021-11-25 20:05:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:50,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:50,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:50,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:50,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 20:05:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:50,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:05:50,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:50,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:50,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:50,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723198126] [2021-11-25 20:05:50,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723198126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:50,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:50,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:05:50,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662597328] [2021-11-25 20:05:50,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:50,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:05:50,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:50,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:05:50,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:50,341 INFO L87 Difference]: Start difference. First operand 1462 states and 1787 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:50,383 INFO L93 Difference]: Finished difference Result 1643 states and 1965 transitions. [2021-11-25 20:05:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:05:50,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-25 20:05:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:50,395 INFO L225 Difference]: With dead ends: 1643 [2021-11-25 20:05:50,395 INFO L226 Difference]: Without dead ends: 1643 [2021-11-25 20:05:50,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:50,397 INFO L933 BasicCegarLoop]: 1221 mSDtfsCounter, 602 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:50,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 2072 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:05:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-11-25 20:05:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1402. [2021-11-25 20:05:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 864 states have (on average 1.9502314814814814) internal successors, (1685), 1396 states have internal predecessors, (1685), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 1701 transitions. [2021-11-25 20:05:50,440 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 1701 transitions. Word has length 13 [2021-11-25 20:05:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:50,441 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 1701 transitions. [2021-11-25 20:05:50,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 1701 transitions. [2021-11-25 20:05:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:05:50,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:50,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:50,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:50,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:50,665 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr364REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:50,666 INFO L85 PathProgramCache]: Analyzing trace with hash -459414345, now seen corresponding path program 1 times [2021-11-25 20:05:50,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:50,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525824620] [2021-11-25 20:05:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:50,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:50,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:50,668 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:50,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 20:05:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:05:50,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:50,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:50,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:50,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525824620] [2021-11-25 20:05:50,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525824620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:50,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:50,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:05:50,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582211582] [2021-11-25 20:05:50,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:50,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:05:50,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:05:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:05:50,913 INFO L87 Difference]: Start difference. First operand 1402 states and 1701 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:50,996 INFO L93 Difference]: Finished difference Result 1615 states and 1909 transitions. [2021-11-25 20:05:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:05:50,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-11-25 20:05:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:51,006 INFO L225 Difference]: With dead ends: 1615 [2021-11-25 20:05:51,006 INFO L226 Difference]: Without dead ends: 1615 [2021-11-25 20:05:51,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:05:51,007 INFO L933 BasicCegarLoop]: 1176 mSDtfsCounter, 573 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:51,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 3196 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:05:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-11-25 20:05:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1372. [2021-11-25 20:05:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 848 states have (on average 1.9186320754716981) internal successors, (1627), 1366 states have internal predecessors, (1627), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1643 transitions. [2021-11-25 20:05:51,053 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1643 transitions. Word has length 15 [2021-11-25 20:05:51,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:51,053 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 1643 transitions. [2021-11-25 20:05:51,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1643 transitions. [2021-11-25 20:05:51,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 20:05:51,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:51,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:51,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:51,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:51,269 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr637ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:51,269 INFO L85 PathProgramCache]: Analyzing trace with hash 552252916, now seen corresponding path program 1 times [2021-11-25 20:05:51,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:51,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000704388] [2021-11-25 20:05:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:51,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:51,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:51,271 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:51,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 20:05:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:51,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:05:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:51,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:51,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:51,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:05:51,585 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-25 20:05:51,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 20:05:51,663 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 20:05:51,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-25 20:05:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:51,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:51,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:51,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000704388] [2021-11-25 20:05:51,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000704388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:51,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:51,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:05:51,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301073201] [2021-11-25 20:05:51,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:51,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:05:51,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:51,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:05:51,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:05:51,708 INFO L87 Difference]: Start difference. First operand 1372 states and 1643 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:53,250 INFO L93 Difference]: Finished difference Result 1826 states and 2167 transitions. [2021-11-25 20:05:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:05:53,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-25 20:05:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:53,257 INFO L225 Difference]: With dead ends: 1826 [2021-11-25 20:05:53,257 INFO L226 Difference]: Without dead ends: 1826 [2021-11-25 20:05:53,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:05:53,258 INFO L933 BasicCegarLoop]: 1143 mSDtfsCounter, 443 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 3307 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:53,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 3307 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:05:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2021-11-25 20:05:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1371. [2021-11-25 20:05:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 847 states have (on average 1.9185360094451003) internal successors, (1625), 1365 states have internal predecessors, (1625), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1641 transitions. [2021-11-25 20:05:53,293 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1641 transitions. Word has length 16 [2021-11-25 20:05:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:53,293 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 1641 transitions. [2021-11-25 20:05:53,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1641 transitions. [2021-11-25 20:05:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:05:53,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:53,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:53,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:53,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:53,507 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash -344619170, now seen corresponding path program 1 times [2021-11-25 20:05:53,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:53,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604409320] [2021-11-25 20:05:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:53,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:53,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:53,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:53,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 20:05:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:53,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:05:53,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:53,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:53,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:53,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604409320] [2021-11-25 20:05:53,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604409320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:53,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:53,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:05:53,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51395376] [2021-11-25 20:05:53,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:53,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:05:53,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:53,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:05:53,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:53,779 INFO L87 Difference]: Start difference. First operand 1371 states and 1641 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:53,817 INFO L93 Difference]: Finished difference Result 1311 states and 1555 transitions. [2021-11-25 20:05:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:05:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-11-25 20:05:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:53,826 INFO L225 Difference]: With dead ends: 1311 [2021-11-25 20:05:53,826 INFO L226 Difference]: Without dead ends: 1311 [2021-11-25 20:05:53,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:05:53,827 INFO L933 BasicCegarLoop]: 1137 mSDtfsCounter, 1106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:53,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1169 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:05:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-11-25 20:05:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1311. [2021-11-25 20:05:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 811 states have (on average 1.8976572133168927) internal successors, (1539), 1305 states have internal predecessors, (1539), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1555 transitions. [2021-11-25 20:05:53,879 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1555 transitions. Word has length 18 [2021-11-25 20:05:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:53,880 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 1555 transitions. [2021-11-25 20:05:53,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1555 transitions. [2021-11-25 20:05:53,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:05:53,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:53,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:53,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:54,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:54,102 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:54,103 INFO L85 PathProgramCache]: Analyzing trace with hash -466544200, now seen corresponding path program 1 times [2021-11-25 20:05:54,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:54,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579041243] [2021-11-25 20:05:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:54,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:54,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:54,106 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:54,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 20:05:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:54,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:05:54,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:54,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:54,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579041243] [2021-11-25 20:05:54,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579041243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:54,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:54,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:05:54,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770612355] [2021-11-25 20:05:54,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:54,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:05:54,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:54,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:05:54,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:05:54,413 INFO L87 Difference]: Start difference. First operand 1311 states and 1555 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:54,512 INFO L93 Difference]: Finished difference Result 1283 states and 1499 transitions. [2021-11-25 20:05:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:05:54,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-25 20:05:54,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:54,521 INFO L225 Difference]: With dead ends: 1283 [2021-11-25 20:05:54,522 INFO L226 Difference]: Without dead ends: 1283 [2021-11-25 20:05:54,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:05:54,523 INFO L933 BasicCegarLoop]: 1092 mSDtfsCounter, 1077 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 2209 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:54,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 2209 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:05:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-11-25 20:05:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1281. [2021-11-25 20:05:54,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 795 states have (on average 1.8628930817610063) internal successors, (1481), 1275 states have internal predecessors, (1481), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1497 transitions. [2021-11-25 20:05:54,557 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1497 transitions. Word has length 20 [2021-11-25 20:05:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:54,558 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1497 transitions. [2021-11-25 20:05:54,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1497 transitions. [2021-11-25 20:05:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 20:05:54,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:54,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:54,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:54,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:54,775 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:54,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:54,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531686, now seen corresponding path program 1 times [2021-11-25 20:05:54,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:54,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356039657] [2021-11-25 20:05:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:54,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:54,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:54,777 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:54,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 20:05:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:55,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:05:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:55,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:05:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:55,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:55,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356039657] [2021-11-25 20:05:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356039657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:55,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:55,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:05:55,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877687330] [2021-11-25 20:05:55,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:55,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:05:55,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:05:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:05:55,182 INFO L87 Difference]: Start difference. First operand 1281 states and 1497 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:58,303 INFO L93 Difference]: Finished difference Result 1880 states and 2230 transitions. [2021-11-25 20:05:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:05:58,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-25 20:05:58,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:58,315 INFO L225 Difference]: With dead ends: 1880 [2021-11-25 20:05:58,315 INFO L226 Difference]: Without dead ends: 1880 [2021-11-25 20:05:58,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:05:58,316 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1768 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:58,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1773 Valid, 1271 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 20:05:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-11-25 20:05:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1277. [2021-11-25 20:05:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 795 states have (on average 1.8528301886792453) internal successors, (1473), 1271 states have internal predecessors, (1473), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:05:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1489 transitions. [2021-11-25 20:05:58,376 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1489 transitions. Word has length 34 [2021-11-25 20:05:58,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:58,377 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 1489 transitions. [2021-11-25 20:05:58,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:05:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1489 transitions. [2021-11-25 20:05:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 20:05:58,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:58,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:58,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:58,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:05:58,598 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:05:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531687, now seen corresponding path program 1 times [2021-11-25 20:05:58,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:05:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277951811] [2021-11-25 20:05:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:58,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:05:58,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:05:58,602 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:05:58,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 20:05:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:58,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:05:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:58,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:05:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:59,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:05:59,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277951811] [2021-11-25 20:05:59,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277951811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:59,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:59,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:05:59,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294748352] [2021-11-25 20:05:59,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:59,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:05:59,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:05:59,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:05:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:05:59,139 INFO L87 Difference]: Start difference. First operand 1277 states and 1489 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:06:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:03,363 INFO L93 Difference]: Finished difference Result 2008 states and 2337 transitions. [2021-11-25 20:06:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:06:03,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-25 20:06:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:03,374 INFO L225 Difference]: With dead ends: 2008 [2021-11-25 20:06:03,374 INFO L226 Difference]: Without dead ends: 2008 [2021-11-25 20:06:03,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:03,375 INFO L933 BasicCegarLoop]: 1438 mSDtfsCounter, 1230 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:03,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 2582 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 20:06:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-11-25 20:06:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1273. [2021-11-25 20:06:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 795 states have (on average 1.8427672955974843) internal successors, (1465), 1267 states have internal predecessors, (1465), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:06:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1481 transitions. [2021-11-25 20:06:03,414 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1481 transitions. Word has length 34 [2021-11-25 20:06:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:03,415 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 1481 transitions. [2021-11-25 20:06:03,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:06:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1481 transitions. [2021-11-25 20:06:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 20:06:03,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:03,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:03,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-25 20:06:03,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:06:03,632 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:06:03,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1509555205, now seen corresponding path program 1 times [2021-11-25 20:06:03,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:06:03,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367072941] [2021-11-25 20:06:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:03,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:06:03,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:06:03,636 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:06:03,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 20:06:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:03,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:06:03,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:04,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:06:04,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:06:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367072941] [2021-11-25 20:06:04,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367072941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:04,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:04,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:06:04,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43668489] [2021-11-25 20:06:04,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:04,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:06:04,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:06:04,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:06:04,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:06:04,113 INFO L87 Difference]: Start difference. First operand 1273 states and 1481 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-11-25 20:06:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:04,192 INFO L93 Difference]: Finished difference Result 1261 states and 1461 transitions. [2021-11-25 20:06:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:06:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 52 [2021-11-25 20:06:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:04,203 INFO L225 Difference]: With dead ends: 1261 [2021-11-25 20:06:04,203 INFO L226 Difference]: Without dead ends: 1261 [2021-11-25 20:06:04,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:04,205 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 1053 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:04,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1061 Valid, 2187 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:06:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-11-25 20:06:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1261. [2021-11-25 20:06:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 783 states have (on average 1.8454661558109835) internal successors, (1445), 1255 states have internal predecessors, (1445), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:06:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1461 transitions. [2021-11-25 20:06:04,236 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1461 transitions. Word has length 52 [2021-11-25 20:06:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:04,236 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 1461 transitions. [2021-11-25 20:06:04,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-11-25 20:06:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1461 transitions. [2021-11-25 20:06:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 20:06:04,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:04,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:04,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:04,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:06:04,456 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:06:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash -881686959, now seen corresponding path program 1 times [2021-11-25 20:06:04,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:06:04,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176335176] [2021-11-25 20:06:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:04,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:06:04,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:06:04,460 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:06:04,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 20:06:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:04,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:06:04,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:04,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:06:04,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:06:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:06:05,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:06:05,687 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:06:05,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-25 20:06:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:05,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:06:05,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:06:05,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176335176] [2021-11-25 20:06:05,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176335176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:05,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:05,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:06:05,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359962603] [2021-11-25 20:06:05,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:05,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:06:05,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:06:05,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:06:05,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:06:05,707 INFO L87 Difference]: Start difference. First operand 1261 states and 1461 transitions. Second operand has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 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) [2021-11-25 20:06:08,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:08,259 INFO L93 Difference]: Finished difference Result 1609 states and 1926 transitions. [2021-11-25 20:06:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:06:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 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 [2021-11-25 20:06:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:08,269 INFO L225 Difference]: With dead ends: 1609 [2021-11-25 20:06:08,269 INFO L226 Difference]: Without dead ends: 1609 [2021-11-25 20:06:08,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:06:08,270 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 1106 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:08,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1109 Valid, 876 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 20:06:08,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-11-25 20:06:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1191. [2021-11-25 20:06:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 751 states have (on average 1.785619174434088) internal successors, (1341), 1185 states have internal predecessors, (1341), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:06:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1357 transitions. [2021-11-25 20:06:08,293 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1357 transitions. Word has length 60 [2021-11-25 20:06:08,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:08,294 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1357 transitions. [2021-11-25 20:06:08,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 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) [2021-11-25 20:06:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1357 transitions. [2021-11-25 20:06:08,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 20:06:08,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:08,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:08,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:08,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:06:08,512 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:06:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:08,513 INFO L85 PathProgramCache]: Analyzing trace with hash -855470841, now seen corresponding path program 1 times [2021-11-25 20:06:08,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:06:08,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111526322] [2021-11-25 20:06:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:08,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:06:08,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:06:08,515 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:06:08,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 20:06:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:08,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:06:08,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:08,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:06:08,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:06:08,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-25 20:06:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:08,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:06:08,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:06:08,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111526322] [2021-11-25 20:06:08,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111526322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:08,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:08,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:06:08,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820240467] [2021-11-25 20:06:08,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:08,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:06:08,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:06:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:06:08,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:08,950 INFO L87 Difference]: Start difference. First operand 1191 states and 1357 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 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) [2021-11-25 20:06:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:11,243 INFO L93 Difference]: Finished difference Result 1190 states and 1356 transitions. [2021-11-25 20:06:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:06:11,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 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 [2021-11-25 20:06:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:11,249 INFO L225 Difference]: With dead ends: 1190 [2021-11-25 20:06:11,250 INFO L226 Difference]: Without dead ends: 1190 [2021-11-25 20:06:11,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:06:11,251 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 4 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:11,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2684 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 20:06:11,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-11-25 20:06:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1190. [2021-11-25 20:06:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 751 states have (on average 1.7842876165113182) internal successors, (1340), 1184 states have internal predecessors, (1340), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:06:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1356 transitions. [2021-11-25 20:06:11,270 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1356 transitions. Word has length 65 [2021-11-25 20:06:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:11,270 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 1356 transitions. [2021-11-25 20:06:11,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 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) [2021-11-25 20:06:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1356 transitions. [2021-11-25 20:06:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 20:06:11,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:11,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:11,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:11,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:06:11,485 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:06:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:11,486 INFO L85 PathProgramCache]: Analyzing trace with hash -855470840, now seen corresponding path program 1 times [2021-11-25 20:06:11,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:06:11,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450782266] [2021-11-25 20:06:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:11,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:06:11,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:06:11,487 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:06:11,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 20:06:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:11,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:06:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:11,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:06:11,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:06:11,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:06:11,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-25 20:06:11,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 20:06:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:11,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:06:11,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:06:11,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450782266] [2021-11-25 20:06:11,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450782266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:11,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:11,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:06:11,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867175208] [2021-11-25 20:06:11,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:11,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:06:11,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:06:11,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:06:11,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:11,977 INFO L87 Difference]: Start difference. First operand 1190 states and 1356 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 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) [2021-11-25 20:06:14,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:14,913 INFO L93 Difference]: Finished difference Result 1189 states and 1355 transitions. [2021-11-25 20:06:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:06:14,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 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 [2021-11-25 20:06:14,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:14,918 INFO L225 Difference]: With dead ends: 1189 [2021-11-25 20:06:14,918 INFO L226 Difference]: Without dead ends: 1189 [2021-11-25 20:06:14,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:06:14,919 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 2 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:14,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2737 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 20:06:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-11-25 20:06:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2021-11-25 20:06:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 750 states have (on average 1.7853333333333334) internal successors, (1339), 1183 states have internal predecessors, (1339), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 20:06:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1355 transitions. [2021-11-25 20:06:14,939 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1355 transitions. Word has length 65 [2021-11-25 20:06:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:14,939 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1355 transitions. [2021-11-25 20:06:14,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 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) [2021-11-25 20:06:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1355 transitions. [2021-11-25 20:06:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:06:14,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:14,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:14,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-25 20:06:15,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:06:15,159 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:06:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash 231575279, now seen corresponding path program 1 times [2021-11-25 20:06:15,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:06:15,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495875398] [2021-11-25 20:06:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:15,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:06:15,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:06:15,161 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:06:15,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 20:06:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:15,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:06:15,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:15,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:06:15,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:06:15,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495875398] [2021-11-25 20:06:15,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495875398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:15,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:15,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:06:15,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135494055] [2021-11-25 20:06:15,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:15,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:06:15,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:06:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:06:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:06:15,621 INFO L87 Difference]: Start difference. First operand 1189 states and 1355 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:06:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:15,664 INFO L93 Difference]: Finished difference Result 1192 states and 1359 transitions. [2021-11-25 20:06:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:06:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-11-25 20:06:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:15,671 INFO L225 Difference]: With dead ends: 1192 [2021-11-25 20:06:15,671 INFO L226 Difference]: Without dead ends: 1192 [2021-11-25 20:06:15,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:15,672 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 2 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:15,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3133 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:06:15,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-11-25 20:06:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1192. [2021-11-25 20:06:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 752 states have (on average 1.7845744680851063) internal successors, (1342), 1186 states have internal predecessors, (1342), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 20:06:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1359 transitions. [2021-11-25 20:06:15,694 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1359 transitions. Word has length 73 [2021-11-25 20:06:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:15,695 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1359 transitions. [2021-11-25 20:06:15,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 20:06:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1359 transitions. [2021-11-25 20:06:15,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 20:06:15,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:15,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:15,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:15,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:06:15,910 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:06:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash -695791212, now seen corresponding path program 1 times [2021-11-25 20:06:15,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:06:15,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905676418] [2021-11-25 20:06:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:15,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:06:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:06:15,912 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:06:15,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 20:06:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:16,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:06:16,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:16,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:16,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:06:16,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905676418] [2021-11-25 20:06:16,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905676418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:16,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [651413043] [2021-11-25 20:06:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:16,455 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:06:16,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:06:16,465 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:06:16,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-25 20:06:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:06:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:17,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:17,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [651413043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:17,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592646650] [2021-11-25 20:06:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:17,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:17,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:06:17,209 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:06:17,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 20:06:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:17,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:06:17,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:17,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:17,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592646650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:17,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:06:17,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 20:06:17,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682126267] [2021-11-25 20:06:17,653 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:06:17,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:06:17,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:06:17,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:06:17,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:06:17,655 INFO L87 Difference]: Start difference. First operand 1192 states and 1359 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:06:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:17,811 INFO L93 Difference]: Finished difference Result 1204 states and 1376 transitions. [2021-11-25 20:06:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:06:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2021-11-25 20:06:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:17,817 INFO L225 Difference]: With dead ends: 1204 [2021-11-25 20:06:17,817 INFO L226 Difference]: Without dead ends: 1204 [2021-11-25 20:06:17,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:06:17,818 INFO L933 BasicCegarLoop]: 1047 mSDtfsCounter, 15 mSDsluCounter, 3130 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4177 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:17,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 4177 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:06:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-11-25 20:06:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1202. [2021-11-25 20:06:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 761 states have (on average 1.783180026281209) internal successors, (1357), 1195 states have internal predecessors, (1357), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 20:06:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1374 transitions. [2021-11-25 20:06:17,841 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1374 transitions. Word has length 74 [2021-11-25 20:06:17,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:17,841 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 1374 transitions. [2021-11-25 20:06:17,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:06:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1374 transitions. [2021-11-25 20:06:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:06:17,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:17,843 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:17,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:18,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:18,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:18,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:18,448 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:06:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash 829132847, now seen corresponding path program 2 times [2021-11-25 20:06:18,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:06:18,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555342752] [2021-11-25 20:06:18,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:06:18,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:06:18,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:06:18,451 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:06:18,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 20:06:18,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:06:18,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:06:18,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:06:18,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:19,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:19,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:06:19,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555342752] [2021-11-25 20:06:19,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555342752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098327889] [2021-11-25 20:06:19,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:06:19,261 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:06:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:06:19,262 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:06:19,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 20:06:20,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:06:20,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:06:20,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:06:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:20,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:20,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098327889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:20,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485351953] [2021-11-25 20:06:20,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 20:06:20,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:06:20,835 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:06:20,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 20:06:37,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 20:06:37,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:06:37,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 20:06:37,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:37,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:06:37,758 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:06:37,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 20:06:37,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:06:37,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:06:37,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:06:38,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-25 20:06:38,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 20:06:38,147 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1651 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1651) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1652 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1652) |c_#memory_$Pointer$.offset|))) is different from true [2021-11-25 20:06:38,255 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1655 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1655) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1656 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1656) |c_#memory_$Pointer$.offset|))) is different from true [2021-11-25 20:06:38,270 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1658 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1658))) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1657) |c_#memory_$Pointer$.base|))) is different from true [2021-11-25 20:06:38,334 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 20:06:38,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 20:06:38,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-25 20:06:38,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-11-25 20:06:38,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 20:06:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-25 20:06:38,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:38,915 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1670 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1669 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_1670) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_1669) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_1670 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_1670) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse1) (bvadd .cse1 (_ bv20 32)))))) is different from false [2021-11-25 20:06:38,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485351953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:06:38,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 20:06:38,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 11] total 24 [2021-11-25 20:06:38,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369643800] [2021-11-25 20:06:38,923 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 20:06:38,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 20:06:38,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:06:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 20:06:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=416, Unknown=15, NotChecked=180, Total=702 [2021-11-25 20:06:38,924 INFO L87 Difference]: Start difference. First operand 1202 states and 1374 transitions. Second operand has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:06:39,895 WARN L860 $PredicateComparison]: unable to prove that (and (not (= |c_#Ultimate.C_memset_#amount| (_ bv44 32))) (exists ((v_ArrVal_1658 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1658))) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1657) |c_#memory_$Pointer$.base|))) is different from true [2021-11-25 20:06:40,444 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1658 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1658))) (exists ((v_ArrVal_1655 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1655) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1657 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1657) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1656 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1656) |c_#memory_$Pointer$.offset|))) is different from true [2021-11-25 20:06:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:48,650 INFO L93 Difference]: Finished difference Result 1619 states and 1920 transitions. [2021-11-25 20:06:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 20:06:48,651 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2021-11-25 20:06:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:48,656 INFO L225 Difference]: With dead ends: 1619 [2021-11-25 20:06:48,656 INFO L226 Difference]: Without dead ends: 1613 [2021-11-25 20:06:48,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 359 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=311, Invalid=1459, Unknown=60, NotChecked=522, Total=2352 [2021-11-25 20:06:48,658 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 743 mSDsluCounter, 7030 mSDsCounter, 0 mSdLazyCounter, 5332 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 7708 SdHoareTripleChecker+Invalid, 11361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6010 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:48,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 7708 Invalid, 11361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5332 Invalid, 0 Unknown, 6010 Unchecked, 8.2s Time] [2021-11-25 20:06:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-11-25 20:06:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1217. [2021-11-25 20:06:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 775 states have (on average 1.7754838709677419) internal successors, (1376), 1209 states have internal predecessors, (1376), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-25 20:06:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1394 transitions. [2021-11-25 20:06:48,685 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1394 transitions. Word has length 77 [2021-11-25 20:06:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:48,686 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 1394 transitions. [2021-11-25 20:06:48,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:06:48,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1394 transitions. [2021-11-25 20:06:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 20:06:48,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:48,687 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:48,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-25 20:06:48,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-25 20:06:49,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:49,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 20:06:49,303 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:06:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:49,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1210450157, now seen corresponding path program 1 times [2021-11-25 20:06:49,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:06:49,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436554916] [2021-11-25 20:06:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:49,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:06:49,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:06:49,305 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:06:49,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 20:06:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:06:49,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:49,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:50,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:06:50,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436554916] [2021-11-25 20:06:50,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436554916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:50,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [326747036] [2021-11-25 20:06:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:50,462 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:06:50,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:06:50,473 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:06:50,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-25 20:06:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:06:51,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:51,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:51,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [326747036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:51,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232982705] [2021-11-25 20:06:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:51,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:51,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:06:51,402 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:06:51,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 20:06:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:06:51,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:51,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:52,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232982705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:52,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 20:06:52,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 35 [2021-11-25 20:06:52,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966919526] [2021-11-25 20:06:52,732 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 20:06:52,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 20:06:52,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 20:06:52,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 20:06:52,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 20:06:52,735 INFO L87 Difference]: Start difference. First operand 1217 states and 1394 transitions. Second operand has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:06:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:55,412 INFO L93 Difference]: Finished difference Result 1250 states and 1436 transitions. [2021-11-25 20:06:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 20:06:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 82 [2021-11-25 20:06:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:55,417 INFO L225 Difference]: With dead ends: 1250 [2021-11-25 20:06:55,417 INFO L226 Difference]: Without dead ends: 1242 [2021-11-25 20:06:55,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1371, Invalid=2789, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 20:06:55,420 INFO L933 BasicCegarLoop]: 1054 mSDtfsCounter, 134 mSDsluCounter, 14678 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 15732 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:55,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 15732 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:06:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-11-25 20:06:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1226. [2021-11-25 20:06:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 785 states have (on average 1.7668789808917198) internal successors, (1387), 1219 states have internal predecessors, (1387), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-25 20:06:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1404 transitions. [2021-11-25 20:06:55,446 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1404 transitions. Word has length 82 [2021-11-25 20:06:55,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:55,447 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1404 transitions. [2021-11-25 20:06:55,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 20:06:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1404 transitions. [2021-11-25 20:06:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 20:06:55,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:55,448 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:55,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-25 20:06:55,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-25 20:06:55,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-25 20:06:56,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:06:56,053 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 635 more)] === [2021-11-25 20:06:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:56,054 INFO L85 PathProgramCache]: Analyzing trace with hash 690574639, now seen corresponding path program 3 times [2021-11-25 20:06:56,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:06:56,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040787112] [2021-11-25 20:06:56,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:06:56,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:06:56,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:06:56,056 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:06:56,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-25 20:06:57,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-25 20:06:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:06:57,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 20:06:57,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:06:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:57,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:06:59,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:06:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040787112] [2021-11-25 20:06:59,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040787112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1625827487] [2021-11-25 20:06:59,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:06:59,703 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:06:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:06:59,703 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:06:59,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-25 20:07:21,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-25 20:07:21,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:07:21,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 20:07:21,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:21,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:07:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:22,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1625827487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:07:22,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742173516] [2021-11-25 20:07:22,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:07:22,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:22,379 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:22,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8df443f6-312d-4a48-a62a-f4758216066f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process