./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a37ff9cc75e7eb9f5325f8fa274b6f05ade1742d661d8f4c826631afb9b4bde2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:33:37,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:33:37,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:33:37,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:33:37,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:33:37,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:33:37,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:33:37,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:33:37,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:33:37,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:33:37,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:33:37,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:33:37,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:33:37,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:33:37,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:33:37,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:33:37,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:33:37,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:33:37,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:33:37,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:33:37,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:33:37,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:33:37,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:33:37,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:33:37,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:33:37,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:33:37,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:33:37,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:33:37,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:33:37,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:33:37,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:33:37,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:33:37,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:33:37,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:33:37,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:33:37,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:33:37,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:33:37,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:33:37,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:33:37,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:33:37,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:33:37,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:33:37,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:33:37,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:33:37,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:33:37,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:33:37,973 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:33:37,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:33:37,974 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:33:37,974 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:33:37,974 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:33:37,975 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:33:37,975 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:33:37,976 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:33:37,976 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:33:37,976 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:33:37,977 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:33:37,977 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:33:37,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:33:37,979 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:33:37,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:33:37,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:33:37,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:33:37,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:33:37,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:33:37,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:33:37,982 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:33:37,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:33:37,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:33:37,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:33:37,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:33:37,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:33:37,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:33:37,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:33:37,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:33:37,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:33:37,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:33:37,986 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:33:37,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:33:37,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:33:37,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:33:37,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:33:37,988 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a37ff9cc75e7eb9f5325f8fa274b6f05ade1742d661d8f4c826631afb9b4bde2 [2021-11-19 14:33:38,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:33:38,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:33:38,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:33:38,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:33:38,342 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:33:38,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i [2021-11-19 14:33:38,430 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/data/e9ded9f96/3383f439296e41ef9b2ecee61a364c52/FLAG8208cafe2 [2021-11-19 14:33:39,275 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:33:39,276 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i [2021-11-19 14:33:39,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/data/e9ded9f96/3383f439296e41ef9b2ecee61a364c52/FLAG8208cafe2 [2021-11-19 14:33:39,444 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/data/e9ded9f96/3383f439296e41ef9b2ecee61a364c52 [2021-11-19 14:33:39,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:33:39,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:33:39,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:39,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:33:39,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:33:39,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:39" (1/1) ... [2021-11-19 14:33:39,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564ebeac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:39, skipping insertion in model container [2021-11-19 14:33:39,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:39" (1/1) ... [2021-11-19 14:33:39,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:33:39,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:33:40,110 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[33021,33034] [2021-11-19 14:33:40,268 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[49681,49694] [2021-11-19 14:33:40,310 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:40,336 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) [2021-11-19 14:33:40,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30d2f464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:40, skipping insertion in model container [2021-11-19 14:33:40,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:40,338 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:33:40,341 INFO L158 Benchmark]: Toolchain (without parser) took 887.21ms. Allocated memory is still 102.8MB. Free memory was 69.1MB in the beginning and 63.5MB in the end (delta: 5.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:33:40,344 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 102.8MB. Free memory was 55.1MB in the beginning and 55.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:33:40,346 INFO L158 Benchmark]: CACSL2BoogieTranslator took 878.07ms. Allocated memory is still 102.8MB. Free memory was 68.9MB in the beginning and 63.5MB in the end (delta: 5.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:33:40,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 102.8MB. Free memory was 55.1MB in the beginning and 55.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 878.07ms. Allocated memory is still 102.8MB. Free memory was 68.9MB in the beginning and 63.5MB in the end (delta: 5.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a37ff9cc75e7eb9f5325f8fa274b6f05ade1742d661d8f4c826631afb9b4bde2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:33:43,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:33:43,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:33:43,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:33:43,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:33:43,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:33:43,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:33:43,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:33:43,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:33:43,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:33:43,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:33:43,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:33:43,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:33:43,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:33:43,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:33:43,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:33:43,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:33:43,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:33:43,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:33:43,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:33:43,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:33:43,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:33:43,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:33:43,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:33:43,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:33:43,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:33:43,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:33:43,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:33:43,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:33:43,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:33:43,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:33:43,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:33:43,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:33:43,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:33:43,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:33:43,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:33:43,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:33:43,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:33:43,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:33:43,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:33:43,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:33:43,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:33:43,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:33:43,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:33:43,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:33:43,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:33:43,437 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:33:43,437 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:33:43,437 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:33:43,437 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:33:43,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:33:43,438 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:33:43,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:33:43,441 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:33:43,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:33:43,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:33:43,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:33:43,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:33:43,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:33:43,443 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:33:43,443 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:33:43,443 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:33:43,443 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:33:43,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:33:43,444 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:33:43,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:33:43,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:33:43,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:33:43,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:33:43,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:33:43,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:33:43,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:33:43,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:33:43,446 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:33:43,446 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:43,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:33:43,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:33:43,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:33:43,447 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a37ff9cc75e7eb9f5325f8fa274b6f05ade1742d661d8f4c826631afb9b4bde2 [2021-11-19 14:33:43,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:33:43,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:33:43,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:33:43,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:33:43,980 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:33:43,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i [2021-11-19 14:33:44,062 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/data/dd722b54e/420780d269664591811871c8f3739b44/FLAGdc7fb3341 [2021-11-19 14:33:45,063 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:33:45,073 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i [2021-11-19 14:33:45,108 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/data/dd722b54e/420780d269664591811871c8f3739b44/FLAGdc7fb3341 [2021-11-19 14:33:45,175 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/data/dd722b54e/420780d269664591811871c8f3739b44 [2021-11-19 14:33:45,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:33:45,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:33:45,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:45,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:33:45,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:33:45,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:45" (1/1) ... [2021-11-19 14:33:45,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d439094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:45, skipping insertion in model container [2021-11-19 14:33:45,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:45" (1/1) ... [2021-11-19 14:33:45,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:33:45,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:33:45,953 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[33021,33034] [2021-11-19 14:33:46,222 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[49681,49694] [2021-11-19 14:33:46,290 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:46,321 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:33:46,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:33:46,389 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[33021,33034] [2021-11-19 14:33:46,493 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[49681,49694] [2021-11-19 14:33:46,510 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:46,516 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:33:46,574 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[33021,33034] [2021-11-19 14:33:46,689 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_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[49681,49694] [2021-11-19 14:33:46,715 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:46,786 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:33:46,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46 WrapperNode [2021-11-19 14:33:46,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:46,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:33:46,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:33:46,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:33:46,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (1/1) ... [2021-11-19 14:33:46,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (1/1) ... [2021-11-19 14:33:47,044 INFO L137 Inliner]: procedures = 180, calls = 487, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1694 [2021-11-19 14:33:47,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:33:47,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:33:47,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:33:47,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:33:47,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (1/1) ... [2021-11-19 14:33:47,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (1/1) ... [2021-11-19 14:33:47,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (1/1) ... [2021-11-19 14:33:47,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (1/1) ... [2021-11-19 14:33:47,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (1/1) ... [2021-11-19 14:33:47,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (1/1) ... [2021-11-19 14:33:47,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (1/1) ... [2021-11-19 14:33:47,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:33:47,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:33:47,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:33:47,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:33:47,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (1/1) ... [2021-11-19 14:33:47,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:33:47,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:33:47,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:33:47,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:33:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:33:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:33:47,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:33:47,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:33:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:33:47,410 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:33:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:33:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:33:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:33:47,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:33:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:33:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:33:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:33:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:33:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:33:47,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:33:47,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:33:47,789 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:33:47,791 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:34:00,752 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:34:00,769 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:34:00,769 INFO L301 CfgBuilder]: Removed 100 assume(true) statements. [2021-11-19 14:34:00,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:34:00 BoogieIcfgContainer [2021-11-19 14:34:00,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:34:00,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:34:00,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:34:00,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:34:00,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:33:45" (1/3) ... [2021-11-19 14:34:00,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744fd0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:34:00, skipping insertion in model container [2021-11-19 14:34:00,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:46" (2/3) ... [2021-11-19 14:34:00,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744fd0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:34:00, skipping insertion in model container [2021-11-19 14:34:00,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:34:00" (3/3) ... [2021-11-19 14:34:00,796 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test5-3.i [2021-11-19 14:34:00,803 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:34:00,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:34:00,902 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:34:00,915 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:34:00,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:34:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 14:34:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:34:00,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:00,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:00,978 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-11-19 14:34:01,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:01,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402225519] [2021-11-19 14:34:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:01,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:01,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:01,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:01,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:34:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:34:01,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:01,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:01,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:01,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402225519] [2021-11-19 14:34:01,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402225519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:01,445 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:01,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:34:01,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642627523] [2021-11-19 14:34:01,448 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:01,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:34:01,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:01,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:34:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:34:01,493 INFO L87 Difference]: Start difference. First operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2021-11-19 14:34:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:01,564 INFO L93 Difference]: Finished difference Result 614 states and 1041 transitions. [2021-11-19 14:34:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:34:01,571 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2021-11-19 14:34:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:01,587 INFO L225 Difference]: With dead ends: 614 [2021-11-19 14:34:01,588 INFO L226 Difference]: Without dead ends: 254 [2021-11-19 14:34:01,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:34:01,615 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:01,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:34:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-19 14:34:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-19 14:34:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 14:34:01,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-11-19 14:34:01,710 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-11-19 14:34:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:01,711 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-11-19 14:34:01,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2021-11-19 14:34:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-11-19 14:34:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 14:34:01,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:01,715 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] [2021-11-19 14:34:01,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:01,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:01,933 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-11-19 14:34:01,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:01,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573768456] [2021-11-19 14:34:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:01,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:01,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:01,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:01,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:34:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:02,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:34:02,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:02,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:02,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:02,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573768456] [2021-11-19 14:34:02,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573768456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:02,607 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:02,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:34:02,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447554167] [2021-11-19 14:34:02,608 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:02,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:02,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:02,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:34:02,612 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:03,059 INFO L93 Difference]: Finished difference Result 575 states and 771 transitions. [2021-11-19 14:34:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-19 14:34:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:03,067 INFO L225 Difference]: With dead ends: 575 [2021-11-19 14:34:03,067 INFO L226 Difference]: Without dead ends: 497 [2021-11-19 14:34:03,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:34:03,070 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 871 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:03,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 690 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:34:03,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-19 14:34:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 425. [2021-11-19 14:34:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 404 states have (on average 1.306930693069307) internal successors, (528), 410 states have internal predecessors, (528), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 14:34:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 562 transitions. [2021-11-19 14:34:03,156 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 562 transitions. Word has length 42 [2021-11-19 14:34:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:03,157 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 562 transitions. [2021-11-19 14:34:03,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 562 transitions. [2021-11-19 14:34:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 14:34:03,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:03,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:03,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:03,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:03,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:03,381 INFO L85 PathProgramCache]: Analyzing trace with hash 627365017, now seen corresponding path program 1 times [2021-11-19 14:34:03,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:03,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142895065] [2021-11-19 14:34:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:03,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:03,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:03,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:03,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:34:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:04,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:04,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:34:05,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:34:06,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:06,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142895065] [2021-11-19 14:34:06,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142895065] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:06,105 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:06,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:34:06,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824114928] [2021-11-19 14:34:06,106 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:06,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:34:06,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:06,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:34:06,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:34:06,110 INFO L87 Difference]: Start difference. First operand 425 states and 562 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:06,281 INFO L93 Difference]: Finished difference Result 850 states and 1130 transitions. [2021-11-19 14:34:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:06,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-19 14:34:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:06,286 INFO L225 Difference]: With dead ends: 850 [2021-11-19 14:34:06,287 INFO L226 Difference]: Without dead ends: 433 [2021-11-19 14:34:06,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:06,290 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:06,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 669 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:06,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-19 14:34:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2021-11-19 14:34:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 416 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 14:34:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 552 transitions. [2021-11-19 14:34:06,339 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 552 transitions. Word has length 238 [2021-11-19 14:34:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:06,340 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 552 transitions. [2021-11-19 14:34:06,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 552 transitions. [2021-11-19 14:34:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 14:34:06,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:06,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:06,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:06,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:06,562 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:06,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1137440641, now seen corresponding path program 1 times [2021-11-19 14:34:06,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:06,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708134350] [2021-11-19 14:34:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:06,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:06,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:06,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:06,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:34:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:07,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:07,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:34:08,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:34:09,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:09,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708134350] [2021-11-19 14:34:09,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708134350] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:09,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:09,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:34:09,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434297062] [2021-11-19 14:34:09,504 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:09,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:34:09,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:09,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:34:09,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:34:09,512 INFO L87 Difference]: Start difference. First operand 431 states and 552 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:10,363 INFO L93 Difference]: Finished difference Result 807 states and 1042 transitions. [2021-11-19 14:34:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:34:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 238 [2021-11-19 14:34:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:10,379 INFO L225 Difference]: With dead ends: 807 [2021-11-19 14:34:10,379 INFO L226 Difference]: Without dead ends: 429 [2021-11-19 14:34:10,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:34:10,382 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:10,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:34:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-19 14:34:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-11-19 14:34:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 408 states have (on average 1.2622549019607843) internal successors, (515), 414 states have internal predecessors, (515), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-19 14:34:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 549 transitions. [2021-11-19 14:34:10,410 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 549 transitions. Word has length 238 [2021-11-19 14:34:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:10,411 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 549 transitions. [2021-11-19 14:34:10,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:10,411 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 549 transitions. [2021-11-19 14:34:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-19 14:34:10,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:10,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:10,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:10,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:10,634 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:10,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:10,635 INFO L85 PathProgramCache]: Analyzing trace with hash 733455842, now seen corresponding path program 1 times [2021-11-19 14:34:10,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:10,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264421713] [2021-11-19 14:34:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:10,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:10,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:10,652 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:10,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:34:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:11,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 14:34:12,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:34:13,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:13,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264421713] [2021-11-19 14:34:13,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264421713] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:13,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:13,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:13,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314436052] [2021-11-19 14:34:13,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:13,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:13,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:13,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:13,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:13,082 INFO L87 Difference]: Start difference. First operand 429 states and 549 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:34:13,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:13,209 INFO L93 Difference]: Finished difference Result 814 states and 1061 transitions. [2021-11-19 14:34:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:13,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2021-11-19 14:34:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:13,217 INFO L225 Difference]: With dead ends: 814 [2021-11-19 14:34:13,218 INFO L226 Difference]: Without dead ends: 432 [2021-11-19 14:34:13,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:34:13,223 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:13,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-19 14:34:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-19 14:34:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 417 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-19 14:34:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 556 transitions. [2021-11-19 14:34:13,260 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 556 transitions. Word has length 253 [2021-11-19 14:34:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:13,263 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 556 transitions. [2021-11-19 14:34:13,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:34:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 556 transitions. [2021-11-19 14:34:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-19 14:34:13,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:13,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:13,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:13,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:13,494 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:13,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1488672828, now seen corresponding path program 1 times [2021-11-19 14:34:13,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:13,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215241717] [2021-11-19 14:34:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:13,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:13,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:13,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:34:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:14,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:34:14,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:34:15,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:15,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215241717] [2021-11-19 14:34:15,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215241717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:15,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [423681722] [2021-11-19 14:34:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:15,825 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:15,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:15,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:15,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 14:34:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:16,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:34:16,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:34:17,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:34:18,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [423681722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:18,504 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:18,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [5, 5] total 14 [2021-11-19 14:34:18,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207609031] [2021-11-19 14:34:18,505 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:18,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:34:18,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:34:18,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:34:18,507 INFO L87 Difference]: Start difference. First operand 432 states and 556 transitions. Second operand has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:34:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:18,783 INFO L93 Difference]: Finished difference Result 792 states and 1033 transitions. [2021-11-19 14:34:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:18,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-19 14:34:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:18,789 INFO L225 Difference]: With dead ends: 792 [2021-11-19 14:34:18,790 INFO L226 Difference]: Without dead ends: 452 [2021-11-19 14:34:18,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:34:18,792 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 548 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:18,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 1284 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:34:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-19 14:34:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2021-11-19 14:34:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 428 states have (on average 1.2289719626168225) internal successors, (526), 435 states have internal predecessors, (526), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-19 14:34:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 564 transitions. [2021-11-19 14:34:18,822 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 564 transitions. Word has length 255 [2021-11-19 14:34:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:18,823 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 564 transitions. [2021-11-19 14:34:18,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:34:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 564 transitions. [2021-11-19 14:34:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-19 14:34:18,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:18,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:18,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:19,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-19 14:34:19,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:19,270 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:19,271 INFO L85 PathProgramCache]: Analyzing trace with hash -301049792, now seen corresponding path program 1 times [2021-11-19 14:34:19,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:19,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189636629] [2021-11-19 14:34:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:19,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:19,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:19,278 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:19,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:34:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:20,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:34:20,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:34:21,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:21,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189636629] [2021-11-19 14:34:21,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189636629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:21,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [226102962] [2021-11-19 14:34:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:21,513 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:21,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:21,515 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:21,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 14:34:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:22,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:34:23,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:34:24,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [226102962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:24,014 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:24,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:34:24,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117607237] [2021-11-19 14:34:24,014 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:24,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:34:24,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:24,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:34:24,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:34:24,017 INFO L87 Difference]: Start difference. First operand 450 states and 564 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:34:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:24,923 INFO L93 Difference]: Finished difference Result 982 states and 1246 transitions. [2021-11-19 14:34:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:34:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-19 14:34:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:24,931 INFO L225 Difference]: With dead ends: 982 [2021-11-19 14:34:24,931 INFO L226 Difference]: Without dead ends: 715 [2021-11-19 14:34:24,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:34:24,933 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 225 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:24,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 712 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:34:24,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-19 14:34:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 713. [2021-11-19 14:34:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 681 states have (on average 1.2378854625550662) internal successors, (843), 693 states have internal predecessors, (843), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (34), 19 states have call predecessors, (34), 27 states have call successors, (34) [2021-11-19 14:34:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 904 transitions. [2021-11-19 14:34:24,976 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 904 transitions. Word has length 255 [2021-11-19 14:34:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:24,977 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 904 transitions. [2021-11-19 14:34:24,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:34:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 904 transitions. [2021-11-19 14:34:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-19 14:34:24,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:24,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:24,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:25,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:25,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:25,392 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash -627607892, now seen corresponding path program 1 times [2021-11-19 14:34:25,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:25,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660499490] [2021-11-19 14:34:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:25,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:25,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:25,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:25,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:34:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:26,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:26,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:34:26,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:34:27,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:27,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660499490] [2021-11-19 14:34:27,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660499490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:27,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1049400604] [2021-11-19 14:34:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:27,624 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:27,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:27,625 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:27,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 14:34:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:28,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 14:34:30,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 14:34:32,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1049400604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:32,587 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:32,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:34:32,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598433636] [2021-11-19 14:34:32,588 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:32,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:34:32,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:34:32,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:34:32,590 INFO L87 Difference]: Start difference. First operand 713 states and 904 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:34:34,037 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:34,102 INFO L93 Difference]: Finished difference Result 1010 states and 1281 transitions. [2021-11-19 14:34:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:34:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 262 [2021-11-19 14:34:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:34,109 INFO L225 Difference]: With dead ends: 1010 [2021-11-19 14:34:34,109 INFO L226 Difference]: Without dead ends: 712 [2021-11-19 14:34:34,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:34:34,112 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 85 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:34,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 697 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:34:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-19 14:34:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 710. [2021-11-19 14:34:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 679 states have (on average 1.2385861561119293) internal successors, (841), 691 states have internal predecessors, (841), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 14:34:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 899 transitions. [2021-11-19 14:34:34,150 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 899 transitions. Word has length 262 [2021-11-19 14:34:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:34,151 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 899 transitions. [2021-11-19 14:34:34,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:34:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 899 transitions. [2021-11-19 14:34:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 14:34:34,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:34,159 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:34,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:34,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:34,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:34,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:34,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1990050795, now seen corresponding path program 1 times [2021-11-19 14:34:34,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:34,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793901374] [2021-11-19 14:34:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:34,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:34,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:34,568 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:34,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:34:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:35,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:34:36,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:34:36,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:36,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793901374] [2021-11-19 14:34:36,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793901374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:36,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1547087282] [2021-11-19 14:34:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:36,817 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:36,819 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:36,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 14:34:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:34:37,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 14:34:38,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 14:34:38,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1547087282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:38,826 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:38,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 7] imperfect sequences [5, 5] total 13 [2021-11-19 14:34:38,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918738076] [2021-11-19 14:34:38,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:38,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:34:38,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:38,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:34:38,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:38,830 INFO L87 Difference]: Start difference. First operand 710 states and 899 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:34:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:39,132 INFO L93 Difference]: Finished difference Result 928 states and 1207 transitions. [2021-11-19 14:34:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:34:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-19 14:34:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:39,140 INFO L225 Difference]: With dead ends: 928 [2021-11-19 14:34:39,141 INFO L226 Difference]: Without dead ends: 773 [2021-11-19 14:34:39,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:39,143 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 13 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:39,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1418 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:34:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-19 14:34:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 770. [2021-11-19 14:34:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 739 states have (on average 1.219215155615697) internal successors, (901), 751 states have internal predecessors, (901), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 14:34:39,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 959 transitions. [2021-11-19 14:34:39,183 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 959 transitions. Word has length 279 [2021-11-19 14:34:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:39,184 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 959 transitions. [2021-11-19 14:34:39,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:34:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 959 transitions. [2021-11-19 14:34:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 14:34:39,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:39,191 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:39,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:39,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:39,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:39,618 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:39,619 INFO L85 PathProgramCache]: Analyzing trace with hash 603847401, now seen corresponding path program 1 times [2021-11-19 14:34:39,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:39,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531153485] [2021-11-19 14:34:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:39,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:39,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:39,623 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:39,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:34:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:40,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:40,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:34:41,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:34:41,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:41,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531153485] [2021-11-19 14:34:41,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531153485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:41,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1269937409] [2021-11-19 14:34:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:41,857 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:41,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:41,858 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:41,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 14:34:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:34:42,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-19 14:34:43,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 14:34:43,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1269937409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:43,993 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:43,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-19 14:34:43,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934532680] [2021-11-19 14:34:43,994 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:43,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:34:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:34:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:43,997 INFO L87 Difference]: Start difference. First operand 770 states and 959 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:34:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:44,199 INFO L93 Difference]: Finished difference Result 1397 states and 1749 transitions. [2021-11-19 14:34:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:44,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 279 [2021-11-19 14:34:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:44,206 INFO L225 Difference]: With dead ends: 1397 [2021-11-19 14:34:44,207 INFO L226 Difference]: Without dead ends: 734 [2021-11-19 14:34:44,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:44,210 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 531 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:44,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 1279 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:34:44,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-19 14:34:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-19 14:34:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 703 states have (on average 1.2005689900426741) internal successors, (844), 715 states have internal predecessors, (844), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 14:34:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 902 transitions. [2021-11-19 14:34:44,259 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 902 transitions. Word has length 279 [2021-11-19 14:34:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:44,260 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 902 transitions. [2021-11-19 14:34:44,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:34:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 902 transitions. [2021-11-19 14:34:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 14:34:44,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:44,265 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:44,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:44,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:44,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:44,688 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:44,689 INFO L85 PathProgramCache]: Analyzing trace with hash 874348137, now seen corresponding path program 1 times [2021-11-19 14:34:44,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:44,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677343621] [2021-11-19 14:34:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:44,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:44,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:44,693 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:44,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:34:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:45,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:45,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:34:46,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:34:46,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:46,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677343621] [2021-11-19 14:34:46,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677343621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:46,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2137779764] [2021-11-19 14:34:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:46,994 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:46,994 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:46,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 14:34:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:47,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:47,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 14:34:48,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 14:34:48,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2137779764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:48,597 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:48,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-19 14:34:48,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806303248] [2021-11-19 14:34:48,597 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:48,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:34:48,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:34:48,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:34:48,599 INFO L87 Difference]: Start difference. First operand 734 states and 902 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:34:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:48,772 INFO L93 Difference]: Finished difference Result 913 states and 1144 transitions. [2021-11-19 14:34:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:48,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-19 14:34:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:48,784 INFO L225 Difference]: With dead ends: 913 [2021-11-19 14:34:48,784 INFO L226 Difference]: Without dead ends: 690 [2021-11-19 14:34:48,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:34:48,787 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 80 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:48,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 994 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-19 14:34:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 683. [2021-11-19 14:34:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 652 states have (on average 1.165644171779141) internal successors, (760), 664 states have internal predecessors, (760), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-19 14:34:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 818 transitions. [2021-11-19 14:34:48,832 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 818 transitions. Word has length 279 [2021-11-19 14:34:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:48,833 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 818 transitions. [2021-11-19 14:34:48,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:34:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 818 transitions. [2021-11-19 14:34:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-19 14:34:48,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:48,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:48,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:49,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:49,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:49,250 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1511815561, now seen corresponding path program 1 times [2021-11-19 14:34:49,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:49,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786319504] [2021-11-19 14:34:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:49,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:49,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:49,255 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:49,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:34:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:50,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:50,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:34:50,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:34:51,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:51,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786319504] [2021-11-19 14:34:51,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786319504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:51,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1313778091] [2021-11-19 14:34:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:51,452 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:51,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:51,454 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:51,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 14:34:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:52,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:52,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:34:53,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:34:53,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1313778091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:53,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950665577] [2021-11-19 14:34:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:53,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:34:53,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:34:53,787 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:34:53,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 14:34:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:54,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:54,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:34:55,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:34:56,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950665577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:56,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:34:56,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-19 14:34:56,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506206022] [2021-11-19 14:34:56,584 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:34:56,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:34:56,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:56,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:34:56,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:34:56,590 INFO L87 Difference]: Start difference. First operand 683 states and 818 transitions. Second operand has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:35:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:00,180 INFO L93 Difference]: Finished difference Result 2877 states and 3565 transitions. [2021-11-19 14:35:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:35:00,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 279 [2021-11-19 14:35:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:00,197 INFO L225 Difference]: With dead ends: 2877 [2021-11-19 14:35:00,198 INFO L226 Difference]: Without dead ends: 2241 [2021-11-19 14:35:00,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1658 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:35:00,201 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 2267 mSDsluCounter, 4547 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2318 SdHoareTripleChecker+Valid, 5346 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:00,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2318 Valid, 5346 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-19 14:35:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-11-19 14:35:00,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1887. [2021-11-19 14:35:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1818 states have (on average 1.174917491749175) internal successors, (2136), 1830 states have internal predecessors, (2136), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-19 14:35:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2283 transitions. [2021-11-19 14:35:00,306 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2283 transitions. Word has length 279 [2021-11-19 14:35:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:00,307 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2283 transitions. [2021-11-19 14:35:00,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:35:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2283 transitions. [2021-11-19 14:35:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-19 14:35:00,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:00,321 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:00,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:00,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:00,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:00,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:35:00,946 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:00,947 INFO L85 PathProgramCache]: Analyzing trace with hash -889533929, now seen corresponding path program 2 times [2021-11-19 14:35:00,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:00,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328606090] [2021-11-19 14:35:00,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:35:00,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:00,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:00,952 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:00,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:35:02,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:35:02,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:35:03,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:35:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 14:35:04,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 14:35:06,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:06,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328606090] [2021-11-19 14:35:06,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328606090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:35:06,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1332709128] [2021-11-19 14:35:06,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:35:06,463 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:35:06,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:35:06,465 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:35:06,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 14:35:10,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:35:10,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:35:10,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:35:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 14:35:11,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 14:35:13,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1332709128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:35:13,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718660033] [2021-11-19 14:35:13,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:35:13,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:35:13,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:35:13,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:35:13,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 14:35:14,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:35:14,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:35:14,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:35:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-19 14:35:16,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-19 14:35:18,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718660033] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:35:18,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:35:18,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-19 14:35:18,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466201306] [2021-11-19 14:35:18,305 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:35:18,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:35:18,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:35:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:35:18,308 INFO L87 Difference]: Start difference. First operand 1887 states and 2283 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:35:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:20,143 INFO L93 Difference]: Finished difference Result 3753 states and 4746 transitions. [2021-11-19 14:35:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 14:35:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 679 [2021-11-19 14:35:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:20,159 INFO L225 Difference]: With dead ends: 3753 [2021-11-19 14:35:20,160 INFO L226 Difference]: Without dead ends: 1907 [2021-11-19 14:35:20,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4093 GetRequests, 4050 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 14:35:20,174 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 155 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 3469 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:20,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 3469 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:35:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-11-19 14:35:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1899. [2021-11-19 14:35:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1830 states have (on average 1.1759562841530056) internal successors, (2152), 1842 states have internal predecessors, (2152), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-19 14:35:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2299 transitions. [2021-11-19 14:35:20,296 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2299 transitions. Word has length 679 [2021-11-19 14:35:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:20,297 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 2299 transitions. [2021-11-19 14:35:20,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:35:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2299 transitions. [2021-11-19 14:35:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-19 14:35:20,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:20,311 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:20,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:20,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:20,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:20,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:35:20,938 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1901317097, now seen corresponding path program 3 times [2021-11-19 14:35:20,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:20,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186427967] [2021-11-19 14:35:20,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:35:20,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:20,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:20,944 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:20,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad76d4d1-1861-498a-9fa4-0ce2cad53b46/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process