./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/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 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:57:44,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:57:44,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:57:44,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:57:44,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:57:44,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:57:44,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:57:44,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:57:44,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:57:44,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:57:44,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:57:44,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:57:44,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:57:44,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:57:44,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:57:44,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:57:44,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:57:44,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:57:44,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:57:44,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:57:44,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:57:44,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:57:44,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:57:44,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:57:44,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:57:44,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:57:44,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:57:44,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:57:44,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:57:44,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:57:44,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:57:44,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:57:44,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:57:44,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:57:44,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:57:44,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:57:44,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:57:44,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:57:44,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:57:44,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:57:44,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:57:44,108 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 17:57:44,145 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:57:44,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:57:44,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:57:44,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:57:44,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:57:44,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:57:44,147 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:57:44,148 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:57:44,148 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:57:44,148 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:57:44,149 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:57:44,149 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:57:44,149 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:57:44,150 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:57:44,150 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:57:44,150 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:57:44,151 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:57:44,151 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:57:44,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 17:57:44,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 17:57:44,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:57:44,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:57:44,153 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 17:57:44,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:57:44,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:57:44,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:57:44,164 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 17:57:44,164 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 17:57:44,164 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 17:57:44,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:57:44,165 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 17:57:44,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:57:44,165 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:57:44,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:57:44,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:57:44,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:57:44,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:57:44,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:57:44,166 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:57:44,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:57:44,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:57:44,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:57:44,167 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 [2021-11-25 17:57:44,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:57:44,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:57:44,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:57:44,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:57:44,481 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:57:44,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-25 17:57:44,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/data/8ced8ff1f/65b9fdb616b54b14a258e3fa32ea5af2/FLAG376a6ff54 [2021-11-25 17:57:45,263 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:57:45,266 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-25 17:57:45,294 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/data/8ced8ff1f/65b9fdb616b54b14a258e3fa32ea5af2/FLAG376a6ff54 [2021-11-25 17:57:45,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/data/8ced8ff1f/65b9fdb616b54b14a258e3fa32ea5af2 [2021-11-25 17:57:45,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:57:45,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:57:45,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:57:45,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:57:45,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:57:45,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:57:45" (1/1) ... [2021-11-25 17:57:45,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a56e7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:45, skipping insertion in model container [2021-11-25 17:57:45,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:57:45" (1/1) ... [2021-11-25 17:57:45,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:57:45,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:57:46,012 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-25 17:57:46,026 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-25 17:57:46,179 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-25 17:57:46,180 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-25 17:57:46,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:57:46,201 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 17:57:46,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@73478bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:46, skipping insertion in model container [2021-11-25 17:57:46,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:57:46,202 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 17:57:46,205 INFO L158 Benchmark]: Toolchain (without parser) took 798.98ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 59.2MB in the beginning and 58.4MB in the end (delta: 788.9kB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2021-11-25 17:57:46,205 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 83.9MB. Free memory is still 57.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 17:57:46,207 INFO L158 Benchmark]: CACSL2BoogieTranslator took 796.62ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 59.0MB in the beginning and 58.4MB in the end (delta: 559.5kB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2021-11-25 17:57:46,209 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 83.9MB. Free memory is still 57.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 796.62ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 59.0MB in the beginning and 58.4MB in the end (delta: 559.5kB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/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 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:57:48,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:57:48,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:57:48,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:57:48,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:57:48,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:57:48,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:57:48,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:57:48,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:57:48,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:57:48,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:57:48,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:57:48,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:57:48,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:57:48,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:57:48,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:57:48,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:57:48,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:57:48,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:57:48,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:57:48,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:57:48,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:57:48,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:57:48,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:57:48,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:57:48,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:57:48,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:57:48,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:57:48,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:57:48,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:57:48,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:57:48,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:57:48,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:57:48,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:57:48,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:57:48,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:57:48,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:57:48,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:57:48,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:57:48,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:57:48,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:57:48,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 17:57:48,853 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:57:48,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:57:48,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:57:48,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:57:48,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:57:48,856 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:57:48,856 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:57:48,856 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:57:48,856 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:57:48,857 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:57:48,858 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:57:48,858 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:57:48,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 17:57:48,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 17:57:48,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:57:48,861 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:57:48,861 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 17:57:48,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:57:48,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:57:48,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:57:48,862 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 17:57:48,862 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 17:57:48,863 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 17:57:48,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:57:48,863 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 17:57:48,864 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 17:57:48,864 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 17:57:48,864 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:57:48,864 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:57:48,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:57:48,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 17:57:48,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:57:48,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:57:48,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:57:48,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:57:48,867 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 17:57:48,867 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 17:57:48,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:57:48,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:57:48,868 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 [2021-11-25 17:57:49,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:57:49,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:57:49,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:57:49,322 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:57:49,322 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:57:49,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-25 17:57:49,416 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/data/8bb4e4ab8/a5351d87ecbc488b8dc3dcdc5edc6314/FLAGdd0e50d38 [2021-11-25 17:57:50,174 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:57:50,175 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-25 17:57:50,207 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/data/8bb4e4ab8/a5351d87ecbc488b8dc3dcdc5edc6314/FLAGdd0e50d38 [2021-11-25 17:57:50,350 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/data/8bb4e4ab8/a5351d87ecbc488b8dc3dcdc5edc6314 [2021-11-25 17:57:50,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:57:50,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:57:50,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:57:50,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:57:50,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:57:50,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:57:50" (1/1) ... [2021-11-25 17:57:50,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30895d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:50, skipping insertion in model container [2021-11-25 17:57:50,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:57:50" (1/1) ... [2021-11-25 17:57:50,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:57:50,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:57:51,258 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-25 17:57:51,272 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-25 17:57:51,430 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-25 17:57:51,431 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-25 17:57:51,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:57:51,451 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 17:57:51,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:57:51,503 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-25 17:57:51,505 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-25 17:57:51,577 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-25 17:57:51,578 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-25 17:57:51,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:57:51,587 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:57:51,620 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-25 17:57:51,622 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-25 17:57:51,666 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-25 17:57:51,675 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_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-25 17:57:51,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:57:51,768 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:57:51,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51 WrapperNode [2021-11-25 17:57:51,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:57:51,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:57:51,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:57:51,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:57:51,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (1/1) ... [2021-11-25 17:57:51,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (1/1) ... [2021-11-25 17:57:51,932 INFO L137 Inliner]: procedures = 285, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1042 [2021-11-25 17:57:51,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:57:51,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:57:51,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:57:51,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:57:51,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (1/1) ... [2021-11-25 17:57:51,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (1/1) ... [2021-11-25 17:57:51,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (1/1) ... [2021-11-25 17:57:51,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (1/1) ... [2021-11-25 17:57:52,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (1/1) ... [2021-11-25 17:57:52,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (1/1) ... [2021-11-25 17:57:52,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (1/1) ... [2021-11-25 17:57:52,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:57:52,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:57:52,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:57:52,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:57:52,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (1/1) ... [2021-11-25 17:57:52,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:57:52,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:57:52,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:57:52,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:57:52,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 17:57:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 17:57:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:57:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 17:57:52,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 17:57:52,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:57:52,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 17:57:52,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 17:57:52,218 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-25 17:57:52,218 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-25 17:57:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 17:57:52,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 17:57:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 17:57:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:57:52,219 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-25 17:57:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-25 17:57:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 17:57:52,220 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-25 17:57:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-25 17:57:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:57:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:57:52,542 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:57:52,543 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:57:57,979 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:57:57,999 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:57:58,000 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-25 17:57:58,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:57:58 BoogieIcfgContainer [2021-11-25 17:57:58,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:57:58,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:57:58,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:57:58,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:57:58,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:57:50" (1/3) ... [2021-11-25 17:57:58,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f98780f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:57:58, skipping insertion in model container [2021-11-25 17:57:58,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:51" (2/3) ... [2021-11-25 17:57:58,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f98780f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:57:58, skipping insertion in model container [2021-11-25 17:57:58,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:57:58" (3/3) ... [2021-11-25 17:57:58,014 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test6-1.i [2021-11-25 17:57:58,020 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:57:58,020 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 531 error locations. [2021-11-25 17:57:58,073 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:57:58,081 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 17:57:58,082 INFO L340 AbstractCegarLoop]: Starting to check reachability of 531 error locations. [2021-11-25 17:57:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 1083 states, 534 states have (on average 2.2284644194756553) internal successors, (1190), 1065 states have internal predecessors, (1190), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 17:57:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 17:57:58,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:58,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 17:57:58,179 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:57:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash 77521, now seen corresponding path program 1 times [2021-11-25 17:57:58,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:57:58,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378064115] [2021-11-25 17:57:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:58,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:57:58,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:57:58,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:57:58,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 17:57:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:57:58,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 17:57:58,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:57:58,578 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 17:57:58,591 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 17:57:58,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:57:58,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:57:58,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378064115] [2021-11-25 17:57:58,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378064115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:57:58,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:57:58,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:57:58,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297145846] [2021-11-25 17:57:58,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:57:58,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:57:58,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:57:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:57:58,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:57:58,667 INFO L87 Difference]: Start difference. First operand has 1083 states, 534 states have (on average 2.2284644194756553) internal successors, (1190), 1065 states have internal predecessors, (1190), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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 17:58:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:00,909 INFO L93 Difference]: Finished difference Result 1162 states and 1229 transitions. [2021-11-25 17:58:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:58:00,911 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 17:58:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:00,936 INFO L225 Difference]: With dead ends: 1162 [2021-11-25 17:58:00,937 INFO L226 Difference]: Without dead ends: 1160 [2021-11-25 17:58:00,938 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 17:58:00,942 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 714 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:00,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 1044 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 17:58:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-11-25 17:58:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1103. [2021-11-25 17:58:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 568 states have (on average 2.084507042253521) internal successors, (1184), 1086 states have internal predecessors, (1184), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 17:58:01,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1210 transitions. [2021-11-25 17:58:01,056 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1210 transitions. Word has length 3 [2021-11-25 17:58:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:01,056 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1210 transitions. [2021-11-25 17:58:01,056 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 17:58:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1210 transitions. [2021-11-25 17:58:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 17:58:01,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:01,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 17:58:01,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-25 17:58:01,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:01,276 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:01,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:01,277 INFO L85 PathProgramCache]: Analyzing trace with hash 77522, now seen corresponding path program 1 times [2021-11-25 17:58:01,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:01,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384683588] [2021-11-25 17:58:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:01,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:01,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:01,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 17:58:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:01,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 17:58:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:01,429 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 17:58:01,442 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 17:58:01,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:01,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:01,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384683588] [2021-11-25 17:58:01,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384683588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:01,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:01,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:58:01,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026175016] [2021-11-25 17:58:01,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:01,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:58:01,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:01,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:58:01,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:01,447 INFO L87 Difference]: Start difference. First operand 1103 states and 1210 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 17:58:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:04,976 INFO L93 Difference]: Finished difference Result 1497 states and 1638 transitions. [2021-11-25 17:58:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:58:04,978 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 17:58:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:04,989 INFO L225 Difference]: With dead ends: 1497 [2021-11-25 17:58:04,989 INFO L226 Difference]: Without dead ends: 1497 [2021-11-25 17:58:04,990 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 17:58:04,992 INFO L933 BasicCegarLoop]: 943 mSDtfsCounter, 418 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:04,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 1538 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 17:58:04,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-11-25 17:58:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1307. [2021-11-25 17:58:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 771 states have (on average 2.0700389105058368) internal successors, (1596), 1288 states have internal predecessors, (1596), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 17:58:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1626 transitions. [2021-11-25 17:58:05,077 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1626 transitions. Word has length 3 [2021-11-25 17:58:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:05,078 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 1626 transitions. [2021-11-25 17:58:05,078 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 17:58:05,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1626 transitions. [2021-11-25 17:58:05,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 17:58:05,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:05,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:05,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:05,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:05,291 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1111693489, now seen corresponding path program 1 times [2021-11-25 17:58:05,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:05,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006571156] [2021-11-25 17:58:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:05,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:05,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:05,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:05,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 17:58:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:05,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:58:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:05,517 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 17:58:05,526 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 17:58:05,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:58:05,633 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 17:58:05,657 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 17:58:05,657 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 18 treesize of output 18 [2021-11-25 17:58:05,705 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 17:58:05,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:05,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:05,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006571156] [2021-11-25 17:58:05,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006571156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:05,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:05,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:58:05,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201548501] [2021-11-25 17:58:05,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:05,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:05,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:05,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:05,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:58:05,708 INFO L87 Difference]: Start difference. First operand 1307 states and 1626 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 17:58:11,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:11,555 INFO L93 Difference]: Finished difference Result 1997 states and 2371 transitions. [2021-11-25 17:58:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:11,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 17:58:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:11,585 INFO L225 Difference]: With dead ends: 1997 [2021-11-25 17:58:11,585 INFO L226 Difference]: Without dead ends: 1997 [2021-11-25 17:58:11,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 17:58:11,587 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 719 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:11,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 1587 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1797 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-25 17:58:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-11-25 17:58:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1452. [2021-11-25 17:58:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 916 states have (on average 2.0513100436681224) internal successors, (1879), 1433 states have internal predecessors, (1879), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 17:58:11,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 1909 transitions. [2021-11-25 17:58:11,633 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 1909 transitions. Word has length 8 [2021-11-25 17:58:11,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:11,633 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 1909 transitions. [2021-11-25 17:58:11,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 17:58:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 1909 transitions. [2021-11-25 17:58:11,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 17:58:11,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:11,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:11,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:11,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:11,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash -102759776, now seen corresponding path program 1 times [2021-11-25 17:58:11,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:11,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129210589] [2021-11-25 17:58:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:11,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:11,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:11,854 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:11,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 17:58:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:12,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 17:58:12,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:12,046 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 17:58:12,074 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 17:58:12,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:12,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129210589] [2021-11-25 17:58:12,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129210589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:12,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:12,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:58:12,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537799898] [2021-11-25 17:58:12,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:12,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:12,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:12,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:12,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:58:12,082 INFO L87 Difference]: Start difference. First operand 1452 states and 1909 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 17:58:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:16,149 INFO L93 Difference]: Finished difference Result 2430 states and 3107 transitions. [2021-11-25 17:58:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:58:16,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-25 17:58:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:16,165 INFO L225 Difference]: With dead ends: 2430 [2021-11-25 17:58:16,165 INFO L226 Difference]: Without dead ends: 2430 [2021-11-25 17:58:16,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 17:58:16,166 INFO L933 BasicCegarLoop]: 1014 mSDtfsCounter, 2141 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2147 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:16,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2147 Valid, 1973 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 17:58:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-11-25 17:58:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1407. [2021-11-25 17:58:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 916 states have (on average 1.9868995633187774) internal successors, (1820), 1388 states have internal predecessors, (1820), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 17:58:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 1850 transitions. [2021-11-25 17:58:16,212 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 1850 transitions. Word has length 9 [2021-11-25 17:58:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:16,213 INFO L470 AbstractCegarLoop]: Abstraction has 1407 states and 1850 transitions. [2021-11-25 17:58:16,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 17:58:16,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 1850 transitions. [2021-11-25 17:58:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 17:58:16,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:16,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:16,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:16,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:16,426 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:16,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:16,426 INFO L85 PathProgramCache]: Analyzing trace with hash -102759775, now seen corresponding path program 1 times [2021-11-25 17:58:16,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:16,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989263199] [2021-11-25 17:58:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:16,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:16,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:16,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:16,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 17:58:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:58:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:16,591 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 17:58:16,647 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 17:58:16,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:16,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989263199] [2021-11-25 17:58:16,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989263199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:16,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:16,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:58:16,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905327080] [2021-11-25 17:58:16,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:16,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:16,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:16,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:58:16,650 INFO L87 Difference]: Start difference. First operand 1407 states and 1850 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 17:58:20,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:20,554 INFO L93 Difference]: Finished difference Result 2046 states and 2685 transitions. [2021-11-25 17:58:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:20,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-25 17:58:20,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:20,568 INFO L225 Difference]: With dead ends: 2046 [2021-11-25 17:58:20,569 INFO L226 Difference]: Without dead ends: 2046 [2021-11-25 17:58:20,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 17:58:20,570 INFO L933 BasicCegarLoop]: 1193 mSDtfsCounter, 1375 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:20,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1378 Valid, 2096 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 17:58:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-11-25 17:58:20,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1397. [2021-11-25 17:58:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 916 states have (on average 1.960698689956332) internal successors, (1796), 1378 states have internal predecessors, (1796), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 17:58:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1826 transitions. [2021-11-25 17:58:20,617 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1826 transitions. Word has length 9 [2021-11-25 17:58:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:20,617 INFO L470 AbstractCegarLoop]: Abstraction has 1397 states and 1826 transitions. [2021-11-25 17:58:20,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states 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 17:58:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1826 transitions. [2021-11-25 17:58:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 17:58:20,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:20,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:20,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:20,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:20,842 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr516ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:20,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash -856298529, now seen corresponding path program 1 times [2021-11-25 17:58:20,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:20,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378973785] [2021-11-25 17:58:20,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:20,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:20,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:20,849 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:20,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 17:58:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:20,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:58:21,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:21,129 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 17:58:21,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:21,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:21,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378973785] [2021-11-25 17:58:21,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378973785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:21,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:21,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:21,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846075197] [2021-11-25 17:58:21,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:21,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:21,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:21,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:58:21,133 INFO L87 Difference]: Start difference. First operand 1397 states and 1826 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 17:58:22,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:22,007 INFO L93 Difference]: Finished difference Result 1873 states and 2393 transitions. [2021-11-25 17:58:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:58:22,008 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 17:58:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:22,019 INFO L225 Difference]: With dead ends: 1873 [2021-11-25 17:58:22,020 INFO L226 Difference]: Without dead ends: 1873 [2021-11-25 17:58:22,020 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 17:58:22,021 INFO L933 BasicCegarLoop]: 1156 mSDtfsCounter, 546 mSDsluCounter, 1966 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 3122 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:22,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 3122 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 17:58:22,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-11-25 17:58:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1648. [2021-11-25 17:58:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1167 states have (on average 1.974293059125964) internal successors, (2304), 1629 states have internal predecessors, (2304), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 17:58:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2334 transitions. [2021-11-25 17:58:22,077 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2334 transitions. Word has length 11 [2021-11-25 17:58:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:22,079 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 2334 transitions. [2021-11-25 17:58:22,079 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 17:58:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2334 transitions. [2021-11-25 17:58:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 17:58:22,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:22,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:22,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:22,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:22,294 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:22,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2117571646, now seen corresponding path program 1 times [2021-11-25 17:58:22,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:22,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761327078] [2021-11-25 17:58:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:22,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:22,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:22,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:22,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 17:58:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:22,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:58:22,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:22,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:58:22,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:58:22,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 17:58:22,618 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-25 17:58:22,619 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 17:58:22,676 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 17:58:22,677 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 17:58:22,715 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 17:58:22,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:22,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:22,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761327078] [2021-11-25 17:58:22,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761327078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:22,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:22,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:22,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45139262] [2021-11-25 17:58:22,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:22,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:22,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:22,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:58:22,719 INFO L87 Difference]: Start difference. First operand 1648 states and 2334 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:58:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:24,396 INFO L93 Difference]: Finished difference Result 1654 states and 2037 transitions. [2021-11-25 17:58:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 17:58:24,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:24,406 INFO L225 Difference]: With dead ends: 1654 [2021-11-25 17:58:24,407 INFO L226 Difference]: Without dead ends: 1654 [2021-11-25 17:58:24,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 17:58:24,408 INFO L933 BasicCegarLoop]: 1040 mSDtfsCounter, 357 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:24,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 2977 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 17:58:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-11-25 17:58:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1290. [2021-11-25 17:58:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 811 states have (on average 1.9506781750924784) internal successors, (1582), 1273 states have internal predecessors, (1582), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 17:58:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1608 transitions. [2021-11-25 17:58:24,447 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1608 transitions. Word has length 14 [2021-11-25 17:58:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:24,448 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 1608 transitions. [2021-11-25 17:58:24,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:58:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1608 transitions. [2021-11-25 17:58:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 17:58:24,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:24,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:24,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:24,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:24,665 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:24,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:24,665 INFO L85 PathProgramCache]: Analyzing trace with hash 769788685, now seen corresponding path program 1 times [2021-11-25 17:58:24,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:24,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310237540] [2021-11-25 17:58:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:24,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:24,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:24,667 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:24,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 17:58:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:24,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:58:24,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:24,933 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 17:58:24,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:24,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310237540] [2021-11-25 17:58:24,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310237540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:24,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:24,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:58:24,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026993670] [2021-11-25 17:58:24,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:24,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:58:24,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:24,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:58:24,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:24,937 INFO L87 Difference]: Start difference. First operand 1290 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 17:58:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:24,975 INFO L93 Difference]: Finished difference Result 1230 states and 1522 transitions. [2021-11-25 17:58:24,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:58:24,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-11-25 17:58:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:24,983 INFO L225 Difference]: With dead ends: 1230 [2021-11-25 17:58:24,984 INFO L226 Difference]: Without dead ends: 1230 [2021-11-25 17:58:24,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 17:58:24,985 INFO L933 BasicCegarLoop]: 1029 mSDtfsCounter, 959 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1096 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 17:58:24,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 1096 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:58:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-25 17:58:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1230. [2021-11-25 17:58:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 775 states have (on average 1.9303225806451614) internal successors, (1496), 1213 states have internal predecessors, (1496), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 17:58:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1522 transitions. [2021-11-25 17:58:25,023 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1522 transitions. Word has length 19 [2021-11-25 17:58:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:25,024 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 1522 transitions. [2021-11-25 17:58:25,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 17:58:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1522 transitions. [2021-11-25 17:58:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 17:58:25,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:25,026 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] [2021-11-25 17:58:25,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:25,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:25,240 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1032548102, now seen corresponding path program 1 times [2021-11-25 17:58:25,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:25,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360338413] [2021-11-25 17:58:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:25,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:25,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:25,244 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:25,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 17:58:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:25,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 17:58:25,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:25,539 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 17:58:25,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:25,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:25,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360338413] [2021-11-25 17:58:25,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360338413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:25,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:25,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:25,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816999627] [2021-11-25 17:58:25,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:25,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:25,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:25,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:25,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:58:25,543 INFO L87 Difference]: Start difference. First operand 1230 states and 1522 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 17:58:25,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:25,639 INFO L93 Difference]: Finished difference Result 1202 states and 1466 transitions. [2021-11-25 17:58:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:25,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-11-25 17:58:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:25,645 INFO L225 Difference]: With dead ends: 1202 [2021-11-25 17:58:25,650 INFO L226 Difference]: Without dead ends: 1202 [2021-11-25 17:58:25,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 17:58:25,654 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 930 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 2028 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 17:58:25,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 2028 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:58:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-11-25 17:58:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1200. [2021-11-25 17:58:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 759 states have (on average 1.8945981554677207) internal successors, (1438), 1183 states have internal predecessors, (1438), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 17:58:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1464 transitions. [2021-11-25 17:58:25,686 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1464 transitions. Word has length 21 [2021-11-25 17:58:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:25,687 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1464 transitions. [2021-11-25 17:58:25,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 17:58:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1464 transitions. [2021-11-25 17:58:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 17:58:25,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:25,689 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] [2021-11-25 17:58:25,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:25,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:25,903 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:25,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308372, now seen corresponding path program 1 times [2021-11-25 17:58:25,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:25,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451579284] [2021-11-25 17:58:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:25,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:25,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:25,905 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:25,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 17:58:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:26,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:58:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:26,156 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 17:58:26,314 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 17:58:26,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:26,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:26,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451579284] [2021-11-25 17:58:26,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451579284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:26,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:26,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:26,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480026681] [2021-11-25 17:58:26,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:26,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:58:26,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:26,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:58:26,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:58:26,317 INFO L87 Difference]: Start difference. First operand 1200 states and 1464 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 17:58:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:30,309 INFO L93 Difference]: Finished difference Result 2184 states and 2665 transitions. [2021-11-25 17:58:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:58:30,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-11-25 17:58:30,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:30,321 INFO L225 Difference]: With dead ends: 2184 [2021-11-25 17:58:30,321 INFO L226 Difference]: Without dead ends: 2184 [2021-11-25 17:58:30,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:58:30,322 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 2037 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:30,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2040 Valid, 2019 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 17:58:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-11-25 17:58:30,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1196. [2021-11-25 17:58:30,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 759 states have (on average 1.8840579710144927) internal successors, (1430), 1179 states have internal predecessors, (1430), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 17:58:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1456 transitions. [2021-11-25 17:58:30,357 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1456 transitions. Word has length 35 [2021-11-25 17:58:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:30,358 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 1456 transitions. [2021-11-25 17:58:30,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 17:58:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1456 transitions. [2021-11-25 17:58:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 17:58:30,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:30,360 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] [2021-11-25 17:58:30,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:30,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:30,588 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1673308373, now seen corresponding path program 1 times [2021-11-25 17:58:30,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:30,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537542423] [2021-11-25 17:58:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:30,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:30,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:30,590 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:30,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 17:58:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:30,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 17:58:30,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:30,861 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 17:58:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:58:31,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:31,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:31,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537542423] [2021-11-25 17:58:31,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537542423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:31,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:31,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:31,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923176362] [2021-11-25 17:58:31,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:31,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:58:31,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:31,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:58:31,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:58:31,174 INFO L87 Difference]: Start difference. First operand 1196 states and 1456 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 17:58:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:35,757 INFO L93 Difference]: Finished difference Result 1806 states and 2219 transitions. [2021-11-25 17:58:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:58:35,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-11-25 17:58:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:35,770 INFO L225 Difference]: With dead ends: 1806 [2021-11-25 17:58:35,770 INFO L226 Difference]: Without dead ends: 1806 [2021-11-25 17:58:35,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:58:35,771 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 1782 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:35,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1782 Valid, 2595 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-25 17:58:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-11-25 17:58:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1192. [2021-11-25 17:58:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 759 states have (on average 1.8735177865612649) internal successors, (1422), 1175 states have internal predecessors, (1422), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 17:58:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1448 transitions. [2021-11-25 17:58:35,801 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1448 transitions. Word has length 35 [2021-11-25 17:58:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:35,801 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1448 transitions. [2021-11-25 17:58:35,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 17:58:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1448 transitions. [2021-11-25 17:58:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 17:58:35,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:35,804 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] [2021-11-25 17:58:35,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:36,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:36,020 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting alt_mallocErr0REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:36,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:36,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2063927218, now seen corresponding path program 1 times [2021-11-25 17:58:36,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:36,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856468291] [2021-11-25 17:58:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:36,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:36,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:36,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:36,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 17:58:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 17:58:36,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:36,436 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 17:58:36,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:36,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:36,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856468291] [2021-11-25 17:58:36,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856468291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:36,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:36,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:36,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190755227] [2021-11-25 17:58:36,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:36,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:58:36,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:58:36,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:58:36,438 INFO L87 Difference]: Start difference. First operand 1192 states and 1448 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:58:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:36,520 INFO L93 Difference]: Finished difference Result 1180 states and 1428 transitions. [2021-11-25 17:58:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:36,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-25 17:58:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:36,532 INFO L225 Difference]: With dead ends: 1180 [2021-11-25 17:58:36,532 INFO L226 Difference]: Without dead ends: 1180 [2021-11-25 17:58:36,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 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 17:58:36,534 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 906 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 2006 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 17:58:36,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 2006 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:58:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-11-25 17:58:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1180. [2021-11-25 17:58:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 747 states have (on average 1.8768406961178046) internal successors, (1402), 1163 states have internal predecessors, (1402), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 17:58:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1428 transitions. [2021-11-25 17:58:36,562 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1428 transitions. Word has length 54 [2021-11-25 17:58:36,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:36,564 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 1428 transitions. [2021-11-25 17:58:36,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:58:36,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1428 transitions. [2021-11-25 17:58:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 17:58:36,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:36,569 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] [2021-11-25 17:58:36,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:36,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:36,783 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_mallocErr0REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash -203140862, now seen corresponding path program 1 times [2021-11-25 17:58:36,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:36,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159780458] [2021-11-25 17:58:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:36,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:36,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:36,787 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:36,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 17:58:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:37,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 17:58:37,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:37,288 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 17:58:37,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 25 [2021-11-25 17:58:37,457 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 17:58:37,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-11-25 17:58:39,672 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 17:58:39,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:39,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:39,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159780458] [2021-11-25 17:58:39,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159780458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:39,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:39,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:39,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137136582] [2021-11-25 17:58:39,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:39,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:58:39,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:58:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:58:39,677 INFO L87 Difference]: Start difference. First operand 1180 states and 1428 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:58:42,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:42,972 INFO L93 Difference]: Finished difference Result 2632 states and 3156 transitions. [2021-11-25 17:58:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:58:42,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-25 17:58:42,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:42,983 INFO L225 Difference]: With dead ends: 2632 [2021-11-25 17:58:42,984 INFO L226 Difference]: Without dead ends: 2632 [2021-11-25 17:58:42,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:58:42,984 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 1419 mSDsluCounter, 2143 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1284 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:42,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1419 Valid, 3021 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1051 Invalid, 0 Unknown, 1284 Unchecked, 3.2s Time] [2021-11-25 17:58:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-11-25 17:58:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 1617. [2021-11-25 17:58:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1169 states have (on average 1.872540633019675) internal successors, (2189), 1588 states have internal predecessors, (2189), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 17:58:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2239 transitions. [2021-11-25 17:58:43,023 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2239 transitions. Word has length 62 [2021-11-25 17:58:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:43,023 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 2239 transitions. [2021-11-25 17:58:43,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:58:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2239 transitions. [2021-11-25 17:58:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 17:58:43,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:43,025 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] [2021-11-25 17:58:43,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-25 17:58:43,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:43,239 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting alt_mallocErr1REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:43,240 INFO L85 PathProgramCache]: Analyzing trace with hash -203140861, now seen corresponding path program 1 times [2021-11-25 17:58:43,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:43,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672908061] [2021-11-25 17:58:43,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:43,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:43,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:43,242 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:43,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 17:58:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:43,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 17:58:43,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:43,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:58:43,740 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 17:58:43,825 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 17:58:43,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 17:58:44,702 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 17:58:44,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:44,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:44,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672908061] [2021-11-25 17:58:44,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672908061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:44,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:44,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:58:44,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191313840] [2021-11-25 17:58:44,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:44,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:58:44,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:44,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:58:44,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:58:44,705 INFO L87 Difference]: Start difference. First operand 1617 states and 2239 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:58:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:48,335 INFO L93 Difference]: Finished difference Result 1623 states and 2246 transitions. [2021-11-25 17:58:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:58:48,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-25 17:58:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:48,344 INFO L225 Difference]: With dead ends: 1623 [2021-11-25 17:58:48,345 INFO L226 Difference]: Without dead ends: 1623 [2021-11-25 17:58:48,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:58:48,345 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 111 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:48,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 2476 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-25 17:58:48,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-11-25 17:58:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1622. [2021-11-25 17:58:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1173 states have (on average 1.8695652173913044) internal successors, (2193), 1592 states have internal predecessors, (2193), 26 states have call successors, (26), 9 states have call predecessors, (26), 7 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-25 17:58:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2245 transitions. [2021-11-25 17:58:48,380 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2245 transitions. Word has length 62 [2021-11-25 17:58:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:48,381 INFO L470 AbstractCegarLoop]: Abstraction has 1622 states and 2245 transitions. [2021-11-25 17:58:48,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:58:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2245 transitions. [2021-11-25 17:58:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 17:58:48,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:48,382 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] [2021-11-25 17:58:48,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:48,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:48,598 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:48,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1864793253, now seen corresponding path program 1 times [2021-11-25 17:58:48,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:48,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907797355] [2021-11-25 17:58:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:48,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:48,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:48,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:48,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 17:58:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:58:48,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:49,040 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 17:58:49,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:49,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:49,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907797355] [2021-11-25 17:58:49,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907797355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:49,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:49,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:58:49,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293204009] [2021-11-25 17:58:49,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:49,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:58:49,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:58:49,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:58:49,042 INFO L87 Difference]: Start difference. First operand 1622 states and 2245 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:58:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:49,180 INFO L93 Difference]: Finished difference Result 1648 states and 2272 transitions. [2021-11-25 17:58:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:58:49,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-25 17:58:49,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:49,190 INFO L225 Difference]: With dead ends: 1648 [2021-11-25 17:58:49,190 INFO L226 Difference]: Without dead ends: 1648 [2021-11-25 17:58:49,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:58:49,191 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 19 mSDsluCounter, 3893 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 4868 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:49,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 4868 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:58:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-11-25 17:58:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1646. [2021-11-25 17:58:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1191 states have (on average 1.8606213266162888) internal successors, (2216), 1612 states have internal predecessors, (2216), 28 states have call successors, (28), 13 states have call predecessors, (28), 11 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-25 17:58:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2272 transitions. [2021-11-25 17:58:49,230 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2272 transitions. Word has length 68 [2021-11-25 17:58:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:49,230 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 2272 transitions. [2021-11-25 17:58:49,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:58:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2272 transitions. [2021-11-25 17:58:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 17:58:49,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:49,232 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] [2021-11-25 17:58:49,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:49,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:49,449 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1913615011, now seen corresponding path program 1 times [2021-11-25 17:58:49,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:49,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001761274] [2021-11-25 17:58:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:49,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:49,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:49,451 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:49,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 17:58:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:49,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:58:49,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:50,027 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 17:58:50,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:50,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:50,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001761274] [2021-11-25 17:58:50,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001761274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:50,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:50,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:58:50,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231656007] [2021-11-25 17:58:50,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:50,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:58:50,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:50,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:58:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:58:50,029 INFO L87 Difference]: Start difference. First operand 1646 states and 2272 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 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 17:58:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:50,215 INFO L93 Difference]: Finished difference Result 1658 states and 2286 transitions. [2021-11-25 17:58:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:58:50,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 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 68 [2021-11-25 17:58:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:50,225 INFO L225 Difference]: With dead ends: 1658 [2021-11-25 17:58:50,225 INFO L226 Difference]: Without dead ends: 1658 [2021-11-25 17:58:50,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:58:50,226 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 23 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3799 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:50,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 3799 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:58:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-11-25 17:58:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1649. [2021-11-25 17:58:50,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1193 states have (on average 1.859178541492037) internal successors, (2218), 1614 states have internal predecessors, (2218), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-25 17:58:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2275 transitions. [2021-11-25 17:58:50,263 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2275 transitions. Word has length 68 [2021-11-25 17:58:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:50,263 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2275 transitions. [2021-11-25 17:58:50,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 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 17:58:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2275 transitions. [2021-11-25 17:58:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 17:58:50,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:50,264 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 17:58:50,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:50,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:50,479 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1847999061, now seen corresponding path program 1 times [2021-11-25 17:58:50,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:50,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671259083] [2021-11-25 17:58:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:50,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:50,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:50,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:50,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 17:58:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:50,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:58:50,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:50,866 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 17:58:51,109 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 17:58:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-25 17:58:51,123 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 17:58:51,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:51,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:51,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671259083] [2021-11-25 17:58:51,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671259083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:51,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:51,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:58:51,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332678277] [2021-11-25 17:58:51,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:51,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:58:51,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:51,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:58:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:58:51,126 INFO L87 Difference]: Start difference. First operand 1649 states and 2275 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 17:58:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:55,038 INFO L93 Difference]: Finished difference Result 2771 states and 3753 transitions. [2021-11-25 17:58:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:58:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2021-11-25 17:58:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:55,057 INFO L225 Difference]: With dead ends: 2771 [2021-11-25 17:58:55,059 INFO L226 Difference]: Without dead ends: 2771 [2021-11-25 17:58:55,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:58:55,060 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 1430 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 691 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:55,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1436 Valid, 2987 Invalid, 2820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2110 Invalid, 0 Unknown, 691 Unchecked, 3.8s Time] [2021-11-25 17:58:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-11-25 17:58:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1648. [2021-11-25 17:58:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1193 states have (on average 1.8575020955574182) internal successors, (2216), 1613 states have internal predecessors, (2216), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-25 17:58:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2273 transitions. [2021-11-25 17:58:55,108 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2273 transitions. Word has length 73 [2021-11-25 17:58:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:55,109 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 2273 transitions. [2021-11-25 17:58:55,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 17:58:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2273 transitions. [2021-11-25 17:58:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 17:58:55,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:55,110 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 17:58:55,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 17:58:55,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:58:55,329 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:58:55,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:55,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1847999062, now seen corresponding path program 1 times [2021-11-25 17:58:55,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:58:55,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16551620] [2021-11-25 17:58:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:55,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:58:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:58:55,331 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:58:55,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 17:58:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:55,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 17:58:55,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:58:55,895 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 17:58:55,922 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 17:58:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 17:58:56,602 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 17:58:56,616 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 17:58:56,616 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 19 treesize of output 19 [2021-11-25 17:58:56,641 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 17:58:56,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:58:56,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:58:56,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16551620] [2021-11-25 17:58:56,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16551620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:56,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:56,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:58:56,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279181189] [2021-11-25 17:58:56,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:56,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:58:56,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:58:56,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:58:56,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:58:56,643 INFO L87 Difference]: Start difference. First operand 1648 states and 2273 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 17:59:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:03,446 INFO L93 Difference]: Finished difference Result 2842 states and 3878 transitions. [2021-11-25 17:59:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:59:03,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2021-11-25 17:59:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:03,453 INFO L225 Difference]: With dead ends: 2842 [2021-11-25 17:59:03,453 INFO L226 Difference]: Without dead ends: 2842 [2021-11-25 17:59:03,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:59:03,455 INFO L933 BasicCegarLoop]: 1061 mSDtfsCounter, 1644 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 3697 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 4784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1060 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:03,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1650 Valid, 3365 Invalid, 4784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3697 Invalid, 0 Unknown, 1060 Unchecked, 6.7s Time] [2021-11-25 17:59:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-11-25 17:59:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1644. [2021-11-25 17:59:03,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1197 states have (on average 1.8412698412698412) internal successors, (2204), 1609 states have internal predecessors, (2204), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-25 17:59:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2261 transitions. [2021-11-25 17:59:03,525 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2261 transitions. Word has length 73 [2021-11-25 17:59:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:03,526 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 2261 transitions. [2021-11-25 17:59:03,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 17:59:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2261 transitions. [2021-11-25 17:59:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 17:59:03,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:03,527 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, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:03,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:03,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:59:03,742 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting alt_bzeroErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:59:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:03,743 INFO L85 PathProgramCache]: Analyzing trace with hash 816968073, now seen corresponding path program 1 times [2021-11-25 17:59:03,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:59:03,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263211224] [2021-11-25 17:59:03,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:03,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:59:03,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:59:03,745 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:59:03,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 17:59:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:04,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 17:59:04,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:04,181 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 17:59:04,202 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 17:59:04,230 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 17:59:04,267 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 17:59:04,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:59:04,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:59:04,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263211224] [2021-11-25 17:59:04,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263211224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:04,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:04,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 17:59:04,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915830694] [2021-11-25 17:59:04,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:04,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:59:04,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:59:04,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:59:04,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:59:04,270 INFO L87 Difference]: Start difference. First operand 1644 states and 2261 transitions. Second operand has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 17:59:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:08,182 INFO L93 Difference]: Finished difference Result 1659 states and 2277 transitions. [2021-11-25 17:59:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 17:59:08,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 80 [2021-11-25 17:59:08,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:08,187 INFO L225 Difference]: With dead ends: 1659 [2021-11-25 17:59:08,188 INFO L226 Difference]: Without dead ends: 1659 [2021-11-25 17:59:08,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:59:08,189 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 23 mSDsluCounter, 3121 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4082 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:08,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 4082 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2696 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 17:59:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-11-25 17:59:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1658. [2021-11-25 17:59:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1209 states have (on average 1.836228287841191) internal successors, (2220), 1621 states have internal predecessors, (2220), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-25 17:59:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2277 transitions. [2021-11-25 17:59:08,219 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2277 transitions. Word has length 80 [2021-11-25 17:59:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:08,220 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 2277 transitions. [2021-11-25 17:59:08,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 17:59:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2277 transitions. [2021-11-25 17:59:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-25 17:59:08,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:08,221 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:08,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:08,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:59:08,454 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting alt_bzeroErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:59:08,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:08,455 INFO L85 PathProgramCache]: Analyzing trace with hash -443793445, now seen corresponding path program 1 times [2021-11-25 17:59:08,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:59:08,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307210616] [2021-11-25 17:59:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:08,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:59:08,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:59:08,456 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:59:08,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-25 17:59:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 17:59:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:08,988 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 17:59:09,042 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 17:59:09,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 17:59:09,122 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 17:59:09,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 17:59:09,243 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 17:59:09,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:59:09,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:59:09,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307210616] [2021-11-25 17:59:09,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307210616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:09,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:09,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 17:59:09,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098031939] [2021-11-25 17:59:09,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:09,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 17:59:09,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:59:09,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 17:59:09,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:59:09,247 INFO L87 Difference]: Start difference. First operand 1658 states and 2277 transitions. Second operand has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 17:59:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:14,706 INFO L93 Difference]: Finished difference Result 1658 states and 2275 transitions. [2021-11-25 17:59:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 17:59:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 81 [2021-11-25 17:59:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:14,710 INFO L225 Difference]: With dead ends: 1658 [2021-11-25 17:59:14,710 INFO L226 Difference]: Without dead ends: 1658 [2021-11-25 17:59:14,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-25 17:59:14,711 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 19 mSDsluCounter, 3932 mSDsCounter, 0 mSdLazyCounter, 2858 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 4888 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:14,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 4888 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2858 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-25 17:59:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-11-25 17:59:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1658. [2021-11-25 17:59:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1209 states have (on average 1.8345740281224152) internal successors, (2218), 1621 states have internal predecessors, (2218), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 24 states have call predecessors, (29), 28 states have call successors, (29) [2021-11-25 17:59:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2275 transitions. [2021-11-25 17:59:14,741 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2275 transitions. Word has length 81 [2021-11-25 17:59:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:14,742 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 2275 transitions. [2021-11-25 17:59:14,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 17:59:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2275 transitions. [2021-11-25 17:59:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 17:59:14,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:14,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:14,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:14,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:59:14,958 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:59:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:14,959 INFO L85 PathProgramCache]: Analyzing trace with hash 540063607, now seen corresponding path program 1 times [2021-11-25 17:59:14,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:59:14,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528414758] [2021-11-25 17:59:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:14,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:59:14,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:59:14,960 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:59:14,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 17:59:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:15,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:59:15,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:15,441 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 17:59:15,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:59:15,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:59:15,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528414758] [2021-11-25 17:59:15,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528414758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:15,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:15,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:59:15,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620891938] [2021-11-25 17:59:15,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:15,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:15,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:59:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:15,444 INFO L87 Difference]: Start difference. First operand 1658 states and 2275 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 17:59:15,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:15,514 INFO L93 Difference]: Finished difference Result 1674 states and 2293 transitions. [2021-11-25 17:59:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:15,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 88 [2021-11-25 17:59:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:15,518 INFO L225 Difference]: With dead ends: 1674 [2021-11-25 17:59:15,518 INFO L226 Difference]: Without dead ends: 1668 [2021-11-25 17:59:15,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:59:15,518 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 10 mSDsluCounter, 2876 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3840 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:15,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 3840 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-11-25 17:59:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1668. [2021-11-25 17:59:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1217 states have (on average 1.8307313064913722) internal successors, (2228), 1631 states have internal predecessors, (2228), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2021-11-25 17:59:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2287 transitions. [2021-11-25 17:59:15,546 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2287 transitions. Word has length 88 [2021-11-25 17:59:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:15,547 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 2287 transitions. [2021-11-25 17:59:15,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 17:59:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2287 transitions. [2021-11-25 17:59:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 17:59:15,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:15,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:15,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:15,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:59:15,762 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:59:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:15,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1380796229, now seen corresponding path program 1 times [2021-11-25 17:59:15,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:59:15,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208112208] [2021-11-25 17:59:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:15,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:59:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:59:15,764 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:59:15,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 17:59:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:16,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:59:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:16,369 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 17:59:16,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:16,643 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 17:59:16,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:59:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208112208] [2021-11-25 17:59:16,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208112208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [983558267] [2021-11-25 17:59:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:16,644 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:59:16,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:59:16,650 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:59:16,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 17:59:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:17,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:59:17,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:17,353 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 17:59:17,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:17,520 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 17:59:17,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [983558267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:17,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72984315] [2021-11-25 17:59:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:17,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:17,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:17,531 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:17,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 17:59:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:17,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:59:17,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:17,943 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 17:59:17,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:18,095 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 17:59:18,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72984315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:18,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:59:18,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-25 17:59:18,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673675884] [2021-11-25 17:59:18,096 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:59:18,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 17:59:18,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:59:18,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 17:59:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-25 17:59:18,098 INFO L87 Difference]: Start difference. First operand 1668 states and 2287 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 17:59:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:18,351 INFO L93 Difference]: Finished difference Result 1694 states and 2317 transitions. [2021-11-25 17:59:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 17:59:18,353 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 89 [2021-11-25 17:59:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:18,357 INFO L225 Difference]: With dead ends: 1694 [2021-11-25 17:59:18,358 INFO L226 Difference]: Without dead ends: 1682 [2021-11-25 17:59:18,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:59:18,359 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 50 mSDsluCounter, 5759 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 6726 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:18,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 6726 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:18,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-11-25 17:59:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1676. [2021-11-25 17:59:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1225 states have (on average 1.826938775510204) internal successors, (2238), 1639 states have internal predecessors, (2238), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2021-11-25 17:59:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2297 transitions. [2021-11-25 17:59:18,404 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2297 transitions. Word has length 89 [2021-11-25 17:59:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:18,405 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 2297 transitions. [2021-11-25 17:59:18,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 17:59:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2297 transitions. [2021-11-25 17:59:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 17:59:18,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:18,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:18,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:18,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:18,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-25 17:59:19,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:19,025 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 17:59:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:19,025 INFO L85 PathProgramCache]: Analyzing trace with hash 180173559, now seen corresponding path program 2 times [2021-11-25 17:59:19,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:59:19,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350675305] [2021-11-25 17:59:19,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:59:19,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:59:19,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:59:19,027 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:59:19,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 17:59:19,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:59:19,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:59:19,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:59:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:19,840 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 17:59:19,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:20,241 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 17:59:20,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:59:20,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350675305] [2021-11-25 17:59:20,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350675305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:20,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1869865615] [2021-11-25 17:59:20,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:59:20,242 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:59:20,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:59:20,243 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:59:20,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-25 17:59:22,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:59:22,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:59:22,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:59:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:22,684 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 17:59:22,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:59:22,906 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 17:59:22,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1869865615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:59:22,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725521088] [2021-11-25 17:59:22,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:59:22,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:22,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:22,908 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:22,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 18:00:46,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:00:46,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:00:46,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 18:00:46,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:47,108 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:00:47,108 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 17 treesize of output 17 [2021-11-25 18:00:47,153 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 18:00:47,768 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:00:47,769 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 41 treesize of output 42 [2021-11-25 18:00:47,846 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 39 treesize of output 21 [2021-11-25 18:00:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:00:47,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:00:48,088 INFO L354 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2021-11-25 18:00:48,088 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 36 treesize of output 35 [2021-11-25 18:00:48,099 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2306 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_#t~mem73#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_2306) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) is different from false [2021-11-25 18:00:48,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725521088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:00:48,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 18:00:48,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 14] total 29 [2021-11-25 18:00:48,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439556367] [2021-11-25 18:00:48,102 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 18:00:48,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 18:00:48,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:00:48,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 18:00:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=756, Unknown=3, NotChecked=56, Total=930 [2021-11-25 18:00:48,104 INFO L87 Difference]: Start difference. First operand 1676 states and 2297 transitions. Second operand has 29 states, 28 states have (on average 6.071428571428571) internal successors, (170), 27 states have internal predecessors, (170), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 18:01:02,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:02,483 INFO L93 Difference]: Finished difference Result 2220 states and 2971 transitions. [2021-11-25 18:01:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 18:01:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 6.071428571428571) internal successors, (170), 27 states have internal predecessors, (170), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 92 [2021-11-25 18:01:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:02,489 INFO L225 Difference]: With dead ends: 2220 [2021-11-25 18:01:02,490 INFO L226 Difference]: Without dead ends: 2208 [2021-11-25 18:01:02,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 430 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=415, Invalid=2526, Unknown=33, NotChecked=106, Total=3080 [2021-11-25 18:01:02,492 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 906 mSDsluCounter, 10238 mSDsCounter, 0 mSdLazyCounter, 8867 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 10808 SdHoareTripleChecker+Invalid, 9641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 8867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 719 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:02,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 10808 Invalid, 9641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 8867 Invalid, 0 Unknown, 719 Unchecked, 13.1s Time] [2021-11-25 18:01:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-11-25 18:01:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1685. [2021-11-25 18:01:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1235 states have (on average 1.8186234817813764) internal successors, (2246), 1648 states have internal predecessors, (2246), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2021-11-25 18:01:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 2305 transitions. [2021-11-25 18:01:02,524 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 2305 transitions. Word has length 92 [2021-11-25 18:01:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:02,524 INFO L470 AbstractCegarLoop]: Abstraction has 1685 states and 2305 transitions. [2021-11-25 18:01:02,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 6.071428571428571) internal successors, (170), 27 states have internal predecessors, (170), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 18:01:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 2305 transitions. [2021-11-25 18:01:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-25 18:01:02,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:02,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:01:02,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-25 18:01:02,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-25 18:01:03,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 18:01:03,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:01:03,148 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 18:01:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash -343220154, now seen corresponding path program 1 times [2021-11-25 18:01:03,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:01:03,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728781304] [2021-11-25 18:01:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:03,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:01:03,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:01:03,150 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:01:03,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-25 18:01:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:03,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:01:03,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:01:03,971 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 18:01:03,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:01:04,835 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 18:01:04,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:01:04,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728781304] [2021-11-25 18:01:04,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728781304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:01:04,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [638883668] [2021-11-25 18:01:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:04,836 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:01:04,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:01:04,838 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:01:04,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-25 18:01:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:01:05,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:01:05,653 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 18:01:05,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:01:05,930 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 18:01:05,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [638883668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:01:05,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475945072] [2021-11-25 18:01:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:05,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:01:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:01:05,938 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:01:05,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 18:01:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:06,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:01:06,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:01:06,510 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 18:01:06,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:01:08,116 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 18:01:08,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475945072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:01:08,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:01:08,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2021-11-25 18:01:08,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018241221] [2021-11-25 18:01:08,116 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:01:08,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-25 18:01:08,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:01:08,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-25 18:01:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1012, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 18:01:08,118 INFO L87 Difference]: Start difference. First operand 1685 states and 2305 transitions. Second operand has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 18:01:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:11,564 INFO L93 Difference]: Finished difference Result 1789 states and 2441 transitions. [2021-11-25 18:01:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-25 18:01:11,565 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 97 [2021-11-25 18:01:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:11,569 INFO L225 Difference]: With dead ends: 1789 [2021-11-25 18:01:11,570 INFO L226 Difference]: Without dead ends: 1771 [2021-11-25 18:01:11,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1544, Invalid=3286, Unknown=0, NotChecked=0, Total=4830 [2021-11-25 18:01:11,573 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 215 mSDsluCounter, 18433 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 19415 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:11,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 19415 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 18:01:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-11-25 18:01:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1723. [2021-11-25 18:01:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1273 states have (on average 1.805184603299293) internal successors, (2298), 1686 states have internal predecessors, (2298), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2021-11-25 18:01:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2357 transitions. [2021-11-25 18:01:11,604 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2357 transitions. Word has length 97 [2021-11-25 18:01:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:11,605 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 2357 transitions. [2021-11-25 18:01:11,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 18:01:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2357 transitions. [2021-11-25 18:01:11,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 18:01:11,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:11,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:01:11,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-25 18:01:11,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-25 18:01:12,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-25 18:01:12,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:01:12,214 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 18:01:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash 744868088, now seen corresponding path program 2 times [2021-11-25 18:01:12,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:01:12,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444775306] [2021-11-25 18:01:12,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:01:12,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:01:12,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:01:12,220 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:01:12,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-25 18:01:12,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:01:12,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:01:12,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 18:01:12,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:01:13,718 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 18:01:13,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:01:17,762 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 18:01:17,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:01:17,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444775306] [2021-11-25 18:01:17,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444775306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:01:17,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [973989835] [2021-11-25 18:01:17,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:01:17,763 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:01:17,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:01:17,764 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:01:17,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-25 18:01:19,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:01:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:01:19,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 18:01:19,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:01:20,038 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 18:01:20,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:01:21,713 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 18:01:21,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [973989835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:01:21,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516249285] [2021-11-25 18:01:21,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:01:21,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:01:21,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:01:21,715 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:01:21,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 18:02:27,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:02:27,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:02:27,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-25 18:02:27,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:28,207 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 18:02:28,336 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:02:28,338 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 18:02:28,445 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 18:02:28,452 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 18:02:28,790 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 18:02:28,795 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 18:02:32,029 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3599 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_3599) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_3598 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_3598) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_27 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_27) (_ bv44 32)))) is different from true [2021-11-25 18:02:32,097 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:02:32,097 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 18:02:32,104 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 18:02:32,335 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 18:02:32,340 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 18:02:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 171 trivial. 20 not checked. [2021-11-25 18:02:32,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:33,194 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3643 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3642 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (_ bv20 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3643) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3642) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_3643 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_3643) |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 (_ bv20 32) .cse1))))) is different from false [2021-11-25 18:02:33,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516249285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:02:33,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 18:02:33,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 13] total 60 [2021-11-25 18:02:33,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883103781] [2021-11-25 18:02:33,200 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 18:02:33,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-25 18:02:33,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:02:33,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-25 18:02:33,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=3007, Unknown=3, NotChecked=238, Total=3906 [2021-11-25 18:02:33,204 INFO L87 Difference]: Start difference. First operand 1723 states and 2357 transitions. Second operand has 60 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 57 states have internal predecessors, (202), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 18:03:46,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:46,002 INFO L93 Difference]: Finished difference Result 2378 states and 3215 transitions. [2021-11-25 18:03:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-25 18:03:46,003 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 57 states have internal predecessors, (202), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 108 [2021-11-25 18:03:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:46,009 INFO L225 Difference]: With dead ends: 2378 [2021-11-25 18:03:46,009 INFO L226 Difference]: Without dead ends: 2360 [2021-11-25 18:03:46,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 460 SyntacticMatches, 21 SemanticMatches, 136 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5669 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=2907, Invalid=15415, Unknown=46, NotChecked=538, Total=18906 [2021-11-25 18:03:46,016 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 2099 mSDsluCounter, 14156 mSDsCounter, 0 mSdLazyCounter, 16711 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2130 SdHoareTripleChecker+Valid, 14726 SdHoareTripleChecker+Invalid, 20333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 16711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3497 IncrementalHoareTripleChecker+Unchecked, 47.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:46,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2130 Valid, 14726 Invalid, 20333 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [125 Valid, 16711 Invalid, 0 Unknown, 3497 Unchecked, 47.9s Time] [2021-11-25 18:03:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-11-25 18:03:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 1786. [2021-11-25 18:03:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1337 states have (on average 1.780104712041885) internal successors, (2380), 1749 states have internal predecessors, (2380), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2021-11-25 18:03:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2439 transitions. [2021-11-25 18:03:46,059 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2439 transitions. Word has length 108 [2021-11-25 18:03:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:46,060 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 2439 transitions. [2021-11-25 18:03:46,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 57 states have internal predecessors, (202), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 18:03:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2439 transitions. [2021-11-25 18:03:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-25 18:03:46,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:46,063 INFO L514 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:46,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:46,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:46,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:46,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:03:46,690 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 18:03:46,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:46,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1178166840, now seen corresponding path program 1 times [2021-11-25 18:03:46,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:03:46,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553466366] [2021-11-25 18:03:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:46,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:03:46,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:03:46,694 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:03:46,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-25 18:03:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:47,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 18:03:47,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:49,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:54,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:03:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553466366] [2021-11-25 18:03:54,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553466366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [79183666] [2021-11-25 18:03:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:54,715 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:03:54,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:03:54,716 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:03:54,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-25 18:03:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:55,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 18:03:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:56,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:57,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [79183666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:57,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865160519] [2021-11-25 18:03:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:57,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:03:57,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:57,304 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:03:57,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-25 18:03:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:57,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-25 18:03:57,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:58,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:18,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865160519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:18,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:04:18,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46, 46, 46, 46] total 134 [2021-11-25 18:04:18,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768273330] [2021-11-25 18:04:18,344 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:18,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-11-25 18:04:18,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-11-25 18:04:18,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=14415, Unknown=0, NotChecked=0, Total=17822 [2021-11-25 18:04:18,353 INFO L87 Difference]: Start difference. First operand 1786 states and 2439 transitions. Second operand has 134 states, 134 states have (on average 1.6492537313432836) internal successors, (221), 134 states have internal predecessors, (221), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 18:05:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:33,751 INFO L93 Difference]: Finished difference Result 2160 states and 2935 transitions. [2021-11-25 18:05:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-11-25 18:05:33,753 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.6492537313432836) internal successors, (221), 134 states have internal predecessors, (221), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 132 [2021-11-25 18:05:33,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:33,756 INFO L225 Difference]: With dead ends: 2160 [2021-11-25 18:05:33,756 INFO L226 Difference]: Without dead ends: 2142 [2021-11-25 18:05:33,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12611 ImplicationChecksByTransitivity, 81.3s TimeCoverageRelationStatistics Valid=18243, Invalid=49097, Unknown=0, NotChecked=0, Total=67340 [2021-11-25 18:05:33,767 INFO L933 BasicCegarLoop]: 1041 mSDtfsCounter, 1843 mSDsluCounter, 68552 mSDsCounter, 0 mSdLazyCounter, 8518 mSolverCounterSat, 1884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 69593 SdHoareTripleChecker+Invalid, 10402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1884 IncrementalHoareTripleChecker+Valid, 8518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:33,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1843 Valid, 69593 Invalid, 10402 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1884 Valid, 8518 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2021-11-25 18:05:33,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-11-25 18:05:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1914. [2021-11-25 18:05:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1465 states have (on average 1.7406143344709897) internal successors, (2550), 1877 states have internal predecessors, (2550), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2021-11-25 18:05:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2609 transitions. [2021-11-25 18:05:33,802 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2609 transitions. Word has length 132 [2021-11-25 18:05:33,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:33,802 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 2609 transitions. [2021-11-25 18:05:33,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.6492537313432836) internal successors, (221), 134 states have internal predecessors, (221), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 18:05:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2609 transitions. [2021-11-25 18:05:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-25 18:05:33,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:33,804 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:33,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:34,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-25 18:05:34,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-25 18:05:34,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:05:34,418 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 18:05:34,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:34,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1570895146, now seen corresponding path program 2 times [2021-11-25 18:05:34,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:34,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104065059] [2021-11-25 18:05:34,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:05:34,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:34,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:34,420 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:34,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-25 18:05:35,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-25 18:05:35,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:35,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:05:35,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:35,498 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-25 18:05:35,499 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 40 treesize of output 30 [2021-11-25 18:05:35,573 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:05:35,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 19 [2021-11-25 18:05:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-25 18:05:35,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:05:35,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:35,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104065059] [2021-11-25 18:05:35,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104065059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:35,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:35,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:05:35,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779324367] [2021-11-25 18:05:35,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:35,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:05:35,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:35,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:05:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:05:35,587 INFO L87 Difference]: Start difference. First operand 1914 states and 2609 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:05:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:38,454 INFO L93 Difference]: Finished difference Result 2982 states and 4078 transitions. [2021-11-25 18:05:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:05:38,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 135 [2021-11-25 18:05:38,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:38,459 INFO L225 Difference]: With dead ends: 2982 [2021-11-25 18:05:38,460 INFO L226 Difference]: Without dead ends: 2982 [2021-11-25 18:05:38,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:05:38,461 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 1649 mSDsluCounter, 3687 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 5346 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:38,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1652 Valid, 5346 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1153 Invalid, 0 Unknown, 442 Unchecked, 2.7s Time] [2021-11-25 18:05:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-11-25 18:05:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1913. [2021-11-25 18:05:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1465 states have (on average 1.7392491467576792) internal successors, (2548), 1876 states have internal predecessors, (2548), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2021-11-25 18:05:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2607 transitions. [2021-11-25 18:05:38,507 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2607 transitions. Word has length 135 [2021-11-25 18:05:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:38,508 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 2607 transitions. [2021-11-25 18:05:38,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:05:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2607 transitions. [2021-11-25 18:05:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-25 18:05:38,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:38,510 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:38,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:38,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:05:38,730 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 18:05:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:38,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1570895145, now seen corresponding path program 1 times [2021-11-25 18:05:38,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:38,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940679761] [2021-11-25 18:05:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:38,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:38,733 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:38,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-25 18:05:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:39,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-25 18:05:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:39,859 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 18:05:40,223 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 18:05:40,268 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:05:40,268 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 18:05:40,306 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 18:05:40,316 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 18:05:40,442 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 18 treesize of output 10 [2021-11-25 18:05:40,445 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 7 treesize of output 3 [2021-11-25 18:05:42,980 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:05:42,980 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 18:05:42,988 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 18:05:43,170 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:05:43,171 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 18:05:43,178 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 18:05:43,217 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 25 treesize of output 13 [2021-11-25 18:05:43,222 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 15 treesize of output 7 [2021-11-25 18:05:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-11-25 18:05:43,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:43,603 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_5642 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_5642) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_5642 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_5643 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_5642) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_5643) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2021-11-25 18:05:43,649 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_5642 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_5643 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_5642) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_5643) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) (forall ((v_ArrVal_5642 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) v_ArrVal_5642) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3)))) (bvule (bvadd (_ bv4 32) .cse2) (bvadd .cse2 (_ bv8 32)))))) is different from false [2021-11-25 18:05:44,572 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_5734 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_5735 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_5642 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_5735) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_5734) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_5642) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_5734 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_5735 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_5642 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_5643 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_5734)) (.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse2 (select (select .cse4 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_5735) .cse2 v_ArrVal_5642) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3)) (select |c_#length| (select (select (store .cse4 .cse2 v_ArrVal_5643) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))))))) is different from false [2021-11-25 18:05:44,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:44,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940679761] [2021-11-25 18:05:44,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940679761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:05:44,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1884514815] [2021-11-25 18:05:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:44,582 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:44,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:44,584 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:44,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-25 18:05:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:49,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-25 18:05:49,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:49,062 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 18:05:49,070 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 18:05:49,923 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:05:49,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 18:05:49,951 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:05:49,951 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 19 treesize of output 19 [2021-11-25 18:05:50,056 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 18:05:50,065 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 18:05:50,199 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 18:05:50,284 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 7 treesize of output 3 [2021-11-25 18:05:54,760 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6177 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_6177) |c_#memory_$Pointer$.offset|)) (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (= (select |c_#length| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_10|) (_ bv40 32))) (exists ((|v_ULTIMATE.start_main_#t~mem73#1.base_BEFORE_CALL_6| (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| |v_ULTIMATE.start_main_#t~mem73#1.base_BEFORE_CALL_6|)))) is different from true [2021-11-25 18:05:54,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:54,803 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 16 treesize of output 18 [2021-11-25 18:05:55,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:05:55,102 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 60 [2021-11-25 18:05:55,120 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-25 18:05:55,121 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 60 treesize of output 44 [2021-11-25 18:05:55,275 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 17 treesize of output 9 [2021-11-25 18:05:55,280 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 15 treesize of output 7 [2021-11-25 18:05:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 44 not checked. [2021-11-25 18:05:55,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:55,839 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 235 treesize of output 163 [2021-11-25 18:06:03,556 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_56 (_ BitVec 32)) (v_ArrVal_6227 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_6227) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)) (_ bv20 32)) (select |c_#length| v_arrayElimCell_56))) (and (forall ((v_ArrVal_6178 (_ BitVec 32))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_6227)) (.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (let ((.cse4 (= (bvadd .cse1 (_ bv8 32)) |c_ULTIMATE.start_main_~user~0#1.offset|)) (.cse3 (= v_arrayElimCell_56 |c_ULTIMATE.start_main_~user~0#1.base|))) (or (and (bvule (bvadd (_ bv8 32) (select (select (store .cse0 v_arrayElimCell_56 (store (select .cse0 v_arrayElimCell_56) (bvadd (_ bv16 32) .cse1) v_ArrVal_6178)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)) (select |c_#length| v_arrayElimCell_56)) (or (not .cse3) (not .cse4))) (and (forall ((v_ArrVal_6179 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (let ((.cse6 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_6227))) (store .cse5 v_arrayElimCell_56 (store (select .cse5 v_arrayElimCell_56) (bvadd (_ bv16 32) (select (select .cse5 |c_ULTIMATE.start_main_~user~0#1.base|) .cse6)) v_ArrVal_6178))) |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))) (select |c_#length| v_ArrVal_6179))) .cse4 .cse3)))))) (forall ((v_prenex_5 (_ BitVec 32))) (let ((.cse7 (let ((.cse9 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_6227))) (store .cse8 v_arrayElimCell_56 (store (select .cse8 v_arrayElimCell_56) (bvadd (_ bv16 32) (select (select .cse8 |c_ULTIMATE.start_main_~user~0#1.base|) .cse9)) v_prenex_5))) |c_ULTIMATE.start_main_~user~0#1.base|) .cse9)))) (bvule (bvadd (_ bv4 32) .cse7) (bvadd (_ bv8 32) .cse7))))))) is different from false [2021-11-25 18:06:03,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1884514815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:03,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767995510] [2021-11-25 18:06:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:03,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:03,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:03,615 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:03,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-25 18:06:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-25 18:06:04,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:04,622 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 18:06:04,668 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:06:04,668 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 18:06:04,813 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 18:06:04,821 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 18:06:05,165 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 18:06:05,170 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 18:06:07,849 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:07,849 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 18:06:07,854 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 18:06:08,205 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:08,205 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 18:06:08,211 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 18:06:08,258 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 18:06:08,264 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 18:06:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-11-25 18:06:08,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:08,378 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_6712 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6713 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_6712) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_6713) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_6712 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_6712) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32)))))) is different from false [2021-11-25 18:06:08,439 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_6712 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_6712) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_6712 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6713 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_6712) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_6713) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))))))) is different from false [2021-11-25 18:06:09,472 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_6804 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6805 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6712 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_6804) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_6805) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_6712) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_6804 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6805 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6712 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6713 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_6805)) (.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse2 (select (select .cse4 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_6804) .cse2 v_ArrVal_6712) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3)) (select |c_#length| (select (select (store .cse4 .cse2 v_ArrVal_6713) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))))))) is different from false [2021-11-25 18:06:09,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767995510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:09,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:06:09,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 14] total 36 [2021-11-25 18:06:09,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020018653] [2021-11-25 18:06:09,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:06:09,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 18:06:09,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:09,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 18:06:09,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1398, Unknown=48, NotChecked=664, Total=2256 [2021-11-25 18:06:09,486 INFO L87 Difference]: Start difference. First operand 1913 states and 2607 transitions. Second operand has 37 states, 33 states have (on average 7.090909090909091) internal successors, (234), 30 states have internal predecessors, (234), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:06:11,413 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5641 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_5641) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_6177 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_6177) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_5640 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_5640) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_38 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_38) (_ bv44 32))) (exists ((|v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_10| (_ BitVec 32))) (= (select |c_#length| |v_ULTIMATE.start_main_~user~0#1.base_BEFORE_CALL_10|) (_ bv40 32))) (exists ((|v_ULTIMATE.start_main_#t~mem73#1.base_BEFORE_CALL_6| (_ BitVec 32))) (= (_ bv44 32) (select |c_#length| |v_ULTIMATE.start_main_#t~mem73#1.base_BEFORE_CALL_6|)))) is different from true [2021-11-25 18:06:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:32,145 INFO L93 Difference]: Finished difference Result 3032 states and 4081 transitions. [2021-11-25 18:06:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:06:32,146 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 7.090909090909091) internal successors, (234), 30 states have internal predecessors, (234), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 135 [2021-11-25 18:06:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:32,149 INFO L225 Difference]: With dead ends: 3032 [2021-11-25 18:06:32,150 INFO L226 Difference]: Without dead ends: 3032 [2021-11-25 18:06:32,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 246 SyntacticMatches, 134 SemanticMatches, 60 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=291, Invalid=2433, Unknown=68, NotChecked=990, Total=3782 [2021-11-25 18:06:32,151 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 2475 mSDsluCounter, 9681 mSDsCounter, 0 mSdLazyCounter, 10933 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2480 SdHoareTripleChecker+Valid, 10359 SdHoareTripleChecker+Invalid, 19775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 10933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8803 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:32,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2480 Valid, 10359 Invalid, 19775 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 10933 Invalid, 0 Unknown, 8803 Unchecked, 20.8s Time] [2021-11-25 18:06:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-11-25 18:06:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 1912. [2021-11-25 18:06:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1465 states have (on average 1.7378839590443687) internal successors, (2546), 1875 states have internal predecessors, (2546), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2021-11-25 18:06:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 2605 transitions. [2021-11-25 18:06:32,191 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 2605 transitions. Word has length 135 [2021-11-25 18:06:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:32,192 INFO L470 AbstractCegarLoop]: Abstraction has 1912 states and 2605 transitions. [2021-11-25 18:06:32,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 7.090909090909091) internal successors, (234), 30 states have internal predecessors, (234), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:06:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 2605 transitions. [2021-11-25 18:06:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-25 18:06:32,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:32,194 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:32,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:32,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:32,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:32,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:32,814 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr86REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 18:06:32,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash -573302594, now seen corresponding path program 1 times [2021-11-25 18:06:32,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:06:32,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991305031] [2021-11-25 18:06:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:32,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:06:32,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:06:32,818 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:06:32,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-25 18:06:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:34,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-25 18:06:34,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:34,212 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 18:06:34,530 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:06:34,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-25 18:06:34,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 18:06:34,820 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 26 treesize of output 14 [2021-11-25 18:06:39,460 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:39,460 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 38 treesize of output 39 [2021-11-25 18:06:39,676 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:39,677 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 41 treesize of output 42 [2021-11-25 18:06:39,850 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:39,851 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 38 treesize of output 39 [2021-11-25 18:06:39,887 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 35 treesize of output 17 [2021-11-25 18:06:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-11-25 18:06:39,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:40,162 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7261 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) v_ArrVal_7261) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))))))))) (_ bv1 1)) (_ bv0 1))) is different from false [2021-11-25 18:06:40,175 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7261 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) v_ArrVal_7261) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:06:40,189 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7261 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7260 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_7260))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7261)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:06:40,205 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7261 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7260 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7260))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7261)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:06:40,572 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7261 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7307 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7260 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_7307))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7260)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7261)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:06:40,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:06:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991305031] [2021-11-25 18:06:40,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991305031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1066759927] [2021-11-25 18:06:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:40,577 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:06:40,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:06:40,582 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:06:40,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-25 18:06:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 18:06:48,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:48,484 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 18:06:48,749 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:06:48,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-25 18:06:48,802 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 18:06:48,916 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 26 treesize of output 14 [2021-11-25 18:06:52,986 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:52,987 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 41 treesize of output 42 [2021-11-25 18:06:53,193 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:53,194 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 38 treesize of output 39 [2021-11-25 18:06:53,306 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:53,307 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 39 treesize of output 40 [2021-11-25 18:06:53,418 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 35 treesize of output 17 [2021-11-25 18:06:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-11-25 18:06:53,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:53,487 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7763 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_7763) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))))))))) is different from false [2021-11-25 18:06:53,506 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7763 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) v_ArrVal_7763) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:06:53,527 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7763 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7762 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_7762))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7763)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:06:53,544 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7763 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7762 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7762))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7763)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))))))))))) is different from false [2021-11-25 18:06:53,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7763 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7762 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7809 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_7809))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7762)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7763)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:06:53,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1066759927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:53,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329989301] [2021-11-25 18:06:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:53,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:53,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:53,903 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:53,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-25 18:06:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 18:06:54,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:54,990 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:06:54,990 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 17 treesize of output 17 [2021-11-25 18:06:55,041 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 18:06:58,568 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:58,569 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 42 treesize of output 43 [2021-11-25 18:06:58,788 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:58,789 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 43 treesize of output 44 [2021-11-25 18:06:59,021 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:06:59,022 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 43 treesize of output 44 [2021-11-25 18:06:59,153 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 39 treesize of output 21 [2021-11-25 18:06:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-11-25 18:06:59,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:59,393 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7261 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8262 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_8262))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7261)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:06:59,414 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7261 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8262 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_8262))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7261)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:06:59,834 INFO L354 Elim1Store]: treesize reduction 5, result has 90.6 percent of original size [2021-11-25 18:06:59,834 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 75 treesize of output 74 [2021-11-25 18:06:59,851 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7261 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8262 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8309 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_#t~mem73#1.base| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_8309))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_8262)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7261)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) is different from false [2021-11-25 18:06:59,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329989301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:59,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:06:59,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 28 [2021-11-25 18:06:59,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250595069] [2021-11-25 18:06:59,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:06:59,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 18:06:59,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:06:59,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 18:06:59,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=806, Unknown=45, NotChecked=910, Total=1892 [2021-11-25 18:06:59,855 INFO L87 Difference]: Start difference. First operand 1912 states and 2605 transitions. Second operand has 29 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 18:07:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:13,469 INFO L93 Difference]: Finished difference Result 2571 states and 3493 transitions. [2021-11-25 18:07:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:07:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 138 [2021-11-25 18:07:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:13,473 INFO L225 Difference]: With dead ends: 2571 [2021-11-25 18:07:13,473 INFO L226 Difference]: Without dead ends: 2571 [2021-11-25 18:07:13,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 262 SyntacticMatches, 141 SemanticMatches, 50 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=176, Invalid=1295, Unknown=63, NotChecked=1118, Total=2652 [2021-11-25 18:07:13,475 INFO L933 BasicCegarLoop]: 1182 mSDtfsCounter, 669 mSDsluCounter, 16086 mSDsCounter, 0 mSdLazyCounter, 4555 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 17268 SdHoareTripleChecker+Invalid, 10640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6059 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:13,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 17268 Invalid, 10640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 4555 Invalid, 0 Unknown, 6059 Unchecked, 9.0s Time] [2021-11-25 18:07:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-11-25 18:07:13,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1911. [2021-11-25 18:07:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1465 states have (on average 1.736518771331058) internal successors, (2544), 1874 states have internal predecessors, (2544), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2021-11-25 18:07:13,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2603 transitions. [2021-11-25 18:07:13,527 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2603 transitions. Word has length 138 [2021-11-25 18:07:13,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:13,527 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 2603 transitions. [2021-11-25 18:07:13,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 4.653846153846154) internal successors, (121), 25 states have internal predecessors, (121), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 18:07:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2603 transitions. [2021-11-25 18:07:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-25 18:07:13,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:13,530 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:13,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:13,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:13,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:14,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:14,147 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr87REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 18:07:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:14,147 INFO L85 PathProgramCache]: Analyzing trace with hash -573302593, now seen corresponding path program 1 times [2021-11-25 18:07:14,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:14,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251803424] [2021-11-25 18:07:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:14,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:14,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:14,149 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:14,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-25 18:07:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:15,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-25 18:07:15,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:15,634 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 18:07:16,114 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 18:07:16,171 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:07:16,171 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 18 treesize of output 18 [2021-11-25 18:07:16,220 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 18:07:16,233 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 18:07:16,392 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 18 treesize of output 10 [2021-11-25 18:07:16,396 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 7 treesize of output 3 [2021-11-25 18:07:18,940 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8809 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_8809) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_8808 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_8808) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_93 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_93) (_ bv44 32)))) is different from true [2021-11-25 18:07:18,999 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:07:18,999 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 18:07:19,004 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 18:07:19,165 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:07:19,165 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 18:07:19,173 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 18:07:19,320 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:07:19,320 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 18:07:19,326 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 18:07:19,367 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 15 treesize of output 7 [2021-11-25 18:07:19,370 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 25 treesize of output 13 [2021-11-25 18:07:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 44 not checked. [2021-11-25 18:07:19,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:07:19,685 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_8812 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_8812) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_8813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8812 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_8812) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_8813) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2021-11-25 18:07:19,727 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_8812 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_8812) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_8813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8812 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_8812) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_8813) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))))))) is different from false [2021-11-25 18:07:19,915 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_8812 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8811 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8810 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_8810) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_8811) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_8812) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_8813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8812 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8811 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8810 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_8811)) (.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse2 (select (select .cse4 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_8810) .cse2 v_ArrVal_8812) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) (_ bv12 32)) (select |c_#length| (select (select (store .cse4 .cse2 v_ArrVal_8813) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))))))) is different from false [2021-11-25 18:07:20,011 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_8813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8812 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8811 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8810 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_8811))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_8810) .cse1 v_ArrVal_8812) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_8813) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)))))))) (forall ((v_ArrVal_8812 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8811 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8810 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (let ((.cse6 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))) (store (store |c_#memory_$Pointer$.offset| .cse5 v_ArrVal_8810) (select (select (store |c_#memory_$Pointer$.base| .cse5 v_ArrVal_8811) |c_ULTIMATE.start_main_~user~0#1.base|) .cse6) v_ArrVal_8812)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse6)))) (bvule (bvadd (_ bv8 32) .cse4) (bvadd .cse4 (_ bv12 32)))))) is different from false [2021-11-25 18:07:21,919 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_8905 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8904 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8812 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8811 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8810 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_8905))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_8904) .cse1 v_ArrVal_8810) (select (select (store .cse2 .cse1 v_ArrVal_8811) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) v_ArrVal_8812))) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3)))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_8905 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8904 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8813 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8812 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8811 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8810 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_8905)) (.cse6 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse4 (select (select .cse8 |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))) (let ((.cse7 (store .cse8 .cse4 v_ArrVal_8811))) (let ((.cse5 (select (select .cse7 |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_8904) .cse4 v_ArrVal_8810) .cse5 v_ArrVal_8812) |c_ULTIMATE.start_main_~user~0#1.base|) .cse6) (_ bv12 32)) (select |c_#length| (select (select (store .cse7 .cse5 v_ArrVal_8813) |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))))))))) is different from false [2021-11-25 18:07:21,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251803424] [2021-11-25 18:07:21,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251803424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1408033762] [2021-11-25 18:07:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:21,932 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:07:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:07:21,933 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:07:21,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-25 18:09:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:26,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-25 18:09:26,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:26,505 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 18:09:27,097 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 18:09:27,182 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:09:27,182 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 18:09:27,330 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 18:09:27,350 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 18:09:27,738 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 18:09:27,746 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 18:09:31,799 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_9405 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_9405) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_9404 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_9404) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_93 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_93) (_ bv44 32)))) is different from true [2021-11-25 18:09:31,911 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:31,912 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 18:09:31,920 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 18:09:32,280 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:32,280 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 18:09:32,288 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 18:09:32,524 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:32,524 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 18:09:32,533 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 18:09:32,586 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 18:09:32,591 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 18:09:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 44 not checked. [2021-11-25 18:09:32,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:32,712 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_9409 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9408 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_9409) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_9408) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_9409 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_9409) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv8 32) .cse1) (bvadd .cse1 (_ bv12 32)))))) is different from false [2021-11-25 18:09:32,755 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_9409 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9408 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_9409) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_9408) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) (forall ((v_ArrVal_9409 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) v_ArrVal_9409) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3)))) (bvule (bvadd .cse2 (_ bv8 32)) (bvadd .cse2 (_ bv12 32)))))) is different from false [2021-11-25 18:09:32,830 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_9409 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9406 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_9406) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_9407) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_9409) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_9409 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9406 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_9407)) (.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse2 (select (select .cse4 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_9406) .cse2 v_ArrVal_9409) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) (_ bv12 32)) (select |c_#length| (select (select (store .cse4 .cse2 v_ArrVal_9408) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))))))) is different from false [2021-11-25 18:09:32,891 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_9409 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9406 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_9406) (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_9407) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) v_ArrVal_9409)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_9409 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9406 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse5))) (let ((.cse6 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_9407))) (let ((.cse4 (select (select .cse6 |c_ULTIMATE.start_main_~user~0#1.base|) .cse5))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_9406) .cse4 v_ArrVal_9409) |c_ULTIMATE.start_main_~user~0#1.base|) .cse5) (_ bv12 32)) (select |c_#length| (select (select (store .cse6 .cse4 v_ArrVal_9408) |c_ULTIMATE.start_main_~user~0#1.base|) .cse5))))))))) is different from false [2021-11-25 18:09:34,332 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_9409 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9406 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9501 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9500 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_9500))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_9501) .cse1 v_ArrVal_9406) (select (select (store .cse2 .cse1 v_ArrVal_9407) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) v_ArrVal_9409))) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3)))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_9409 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9408 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9407 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9406 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9501 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9500 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_9500)) (.cse6 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse4 (select (select .cse8 |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))) (let ((.cse7 (store .cse8 .cse4 v_ArrVal_9407))) (let ((.cse5 (select (select .cse7 |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_9501) .cse4 v_ArrVal_9406) .cse5 v_ArrVal_9409) |c_ULTIMATE.start_main_~user~0#1.base|) .cse6) (_ bv12 32)) (select |c_#length| (select (select (store .cse7 .cse5 v_ArrVal_9408) |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))))))))) is different from false [2021-11-25 18:09:34,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1408033762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:34,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590013324] [2021-11-25 18:09:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:34,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:09:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:09:34,349 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:09:34,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-25 18:09:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:35,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-25 18:09:35,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:09:35,625 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 18:09:35,687 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:09:35,688 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 17 treesize of output 17 [2021-11-25 18:09:35,718 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 18:09:35,744 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 18:09:35,905 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 18:09:35,912 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 18:09:39,841 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_9999 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_9999) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_10000 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_10000) |c_#memory_$Pointer$.offset|)) (exists ((v_arrayElimCell_93 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_93) (_ bv44 32)))) is different from true [2021-11-25 18:09:39,939 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:39,940 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 18:09:39,948 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 18:09:40,157 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:40,157 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 18:09:40,166 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 18:09:40,277 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:09:40,277 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 18:09:40,295 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 18:09:40,353 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 18:09:40,359 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 18:09:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 903 trivial. 44 not checked. [2021-11-25 18:09:40,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:09:40,474 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_10003 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_10003) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_10003 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10004 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_10003) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_10004) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2021-11-25 18:09:40,524 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_10003 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10003) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_10003 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10004 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_10003) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_10004) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))))))) is different from false [2021-11-25 18:09:40,604 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_10003 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10001 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10002 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_10001) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_10002) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10003) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_10003 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10004 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10001 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10002 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_10002)) (.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse2 (select (select .cse4 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_10001) .cse2 v_ArrVal_10003) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) (_ bv12 32)) (select |c_#length| (select (select (store .cse4 .cse2 v_ArrVal_10004) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))))))) is different from false [2021-11-25 18:09:40,674 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_10003 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10001 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10002 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_10001) (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_10002) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) v_ArrVal_10003)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_10003 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10004 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10001 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10002 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse5))) (let ((.cse6 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_10002))) (let ((.cse4 (select (select .cse6 |c_ULTIMATE.start_main_~user~0#1.base|) .cse5))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_10001) .cse4 v_ArrVal_10003) |c_ULTIMATE.start_main_~user~0#1.base|) .cse5) (_ bv12 32)) (select |c_#length| (select (select (store .cse6 .cse4 v_ArrVal_10004) |c_ULTIMATE.start_main_~user~0#1.base|) .cse5))))))))) is different from false [2021-11-25 18:09:42,889 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_10096 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10003 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10001 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10002 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10095 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_10095))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_10096) .cse1 v_ArrVal_10001) (select (select (store .cse2 .cse1 v_ArrVal_10002) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) v_ArrVal_10003))) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3)))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_10096 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10003 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10004 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10001 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10002 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10095 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_10095)) (.cse6 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse4 (select (select .cse8 |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))) (let ((.cse7 (store .cse8 .cse4 v_ArrVal_10002))) (let ((.cse5 (select (select .cse7 |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_10096) .cse4 v_ArrVal_10001) .cse5 v_ArrVal_10003) |c_ULTIMATE.start_main_~user~0#1.base|) .cse6) (_ bv12 32)) (select |c_#length| (select (select (store .cse7 .cse5 v_ArrVal_10004) |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))))))))) is different from false [2021-11-25 18:09:42,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590013324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:09:42,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:09:42,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 25 [2021-11-25 18:09:42,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074379686] [2021-11-25 18:09:42,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:09:42,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 18:09:42,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:09:42,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 18:09:42,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=543, Unknown=19, NotChecked=1134, Total=1806 [2021-11-25 18:09:42,906 INFO L87 Difference]: Start difference. First operand 1911 states and 2603 transitions. Second operand has 26 states, 23 states have (on average 7.478260869565218) internal successors, (172), 22 states have internal predecessors, (172), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 18:09:45,396 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_9405 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_9405) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_9999 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_9999) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_10000 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_10000) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_8809 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_8809) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_9404 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| |c_alt_bzero_#in~a#1.base| v_ArrVal_9404) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_8808 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_alt_bzero_#in~a#1.base| v_ArrVal_8808) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_93 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_93) (_ bv44 32)))) is different from true [2021-11-25 18:10:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:32,868 INFO L93 Difference]: Finished difference Result 3030 states and 4077 transitions. [2021-11-25 18:10:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:10:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 7.478260869565218) internal successors, (172), 22 states have internal predecessors, (172), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 138 [2021-11-25 18:10:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:32,872 INFO L225 Difference]: With dead ends: 3030 [2021-11-25 18:10:32,872 INFO L226 Difference]: Without dead ends: 3030 [2021-11-25 18:10:32,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 266 SyntacticMatches, 136 SemanticMatches, 52 ConstructedPredicates, 19 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=192, Invalid=1054, Unknown=20, NotChecked=1596, Total=2862 [2021-11-25 18:10:32,874 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 1910 mSDsluCounter, 8616 mSDsCounter, 0 mSdLazyCounter, 13770 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 9422 SdHoareTripleChecker+Invalid, 19810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 13770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6009 IncrementalHoareTripleChecker+Unchecked, 48.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:32,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1915 Valid, 9422 Invalid, 19810 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 13770 Invalid, 0 Unknown, 6009 Unchecked, 48.7s Time] [2021-11-25 18:10:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-11-25 18:10:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 1910. [2021-11-25 18:10:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1465 states have (on average 1.7351535836177474) internal successors, (2542), 1873 states have internal predecessors, (2542), 28 states have call successors, (28), 15 states have call predecessors, (28), 16 states have return successors, (31), 24 states have call predecessors, (31), 28 states have call successors, (31) [2021-11-25 18:10:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2601 transitions. [2021-11-25 18:10:32,908 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2601 transitions. Word has length 138 [2021-11-25 18:10:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:32,908 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 2601 transitions. [2021-11-25 18:10:32,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 7.478260869565218) internal successors, (172), 22 states have internal predecessors, (172), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 18:10:32,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2601 transitions. [2021-11-25 18:10:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-25 18:10:32,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:32,912 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:32,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:33,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:33,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-25 18:10:33,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:10:33,526 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [alt_mallocErr0REQUIRES_VIOLATION, alt_mallocErr1REQUIRES_VIOLATION, alt_freeErr0REQUIRES_VIOLATION, alt_freeErr1REQUIRES_VIOLATION (and 527 more)] === [2021-11-25 18:10:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:33,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1827699965, now seen corresponding path program 1 times [2021-11-25 18:10:33,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:10:33,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783557629] [2021-11-25 18:10:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:33,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:10:33,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:10:33,531 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:10:33,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-25 18:10:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:35,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 18:10:35,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:35,408 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 18:10:35,949 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:10:35,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-25 18:10:36,054 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 18:10:36,356 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 26 treesize of output 14 [2021-11-25 18:10:43,828 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:10:43,829 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 38 treesize of output 39 [2021-11-25 18:10:44,168 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:10:44,168 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 38 treesize of output 39 [2021-11-25 18:10:44,420 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:10:44,420 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 38 treesize of output 39 [2021-11-25 18:10:44,724 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 18:10:44,724 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 41 treesize of output 42 [2021-11-25 18:10:44,840 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 35 treesize of output 17 [2021-11-25 18:10:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-11-25 18:10:44,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:10:45,189 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_10568 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem76#1.base| v_ArrVal_10568) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))))))) (_ bv1 1)))) is different from false [2021-11-25 18:10:45,213 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_10568 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) v_ArrVal_10568) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:10:45,260 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_10568 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10567 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem75#1.base| v_ArrVal_10567))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10568)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:10:45,297 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_10568 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10567 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10567))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10568)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:10:45,347 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_10568 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10566 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10567 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem74#1.base| v_ArrVal_10566))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10567)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10568)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:10:45,384 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_10568 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10566 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10567 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10566))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10567)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10568)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:10:45,988 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_10568 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10566 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10567 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10614 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem73#1.base| v_ArrVal_10614))) (store .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10566)))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10567)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10568)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))))))))))))))) is different from false [2021-11-25 18:10:45,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:10:45,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783557629] [2021-11-25 18:10:45,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783557629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:10:45,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [886939042] [2021-11-25 18:10:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:45,994 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:10:45,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:10:45,995 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:10:45,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88168df9-e40c-4a1a-a90e-e4bd61c08d0b/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-25 18:10:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-25 18:10:55,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:10:55,434 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 18:10:55,953 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:10:55,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-25 18:10:56,042 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 18:10:56,226 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 26 treesize of output 14