./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3011b5baaaedb6c621e2913d841379eae3b8a9da7212e43b784fc8c1004eda96 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:07:03,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:07:03,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:07:03,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:07:03,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:07:03,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:07:03,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:07:03,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:07:03,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:07:03,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:07:03,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:07:03,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:07:03,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:07:03,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:07:03,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:07:03,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:07:03,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:07:03,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:07:03,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:07:03,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:07:03,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:07:03,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:07:03,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:07:03,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:07:03,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:07:03,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:07:03,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:07:03,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:07:03,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:07:03,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:07:03,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:07:03,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:07:03,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:07:03,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:07:03,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:07:03,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:07:03,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:07:03,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:07:03,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:07:03,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:07:03,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:07:03,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:07:03,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:07:03,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:07:03,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:07:03,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:07:03,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:07:03,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:07:03,204 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:07:03,204 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:07:03,205 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:07:03,205 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:07:03,205 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:07:03,205 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:07:03,205 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:07:03,205 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:07:03,206 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:07:03,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:07:03,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:07:03,206 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:07:03,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:07:03,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:07:03,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:07:03,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:07:03,208 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:07:03,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:07:03,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:07:03,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:07:03,208 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:07:03,209 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:07:03,209 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:07:03,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:07:03,209 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:07:03,209 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:07:03,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:07:03,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:07:03,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:07:03,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:07:03,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:07:03,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:07:03,211 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:07:03,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:07:03,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:07:03,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:07:03,212 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3011b5baaaedb6c621e2913d841379eae3b8a9da7212e43b784fc8c1004eda96 [2021-11-25 18:07:03,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:07:03,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:07:03,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:07:03,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:07:03,518 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:07:03,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i [2021-11-25 18:07:03,588 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/data/26e3ba018/ba05d4b434ae497a807052b592791e5f/FLAGa00d9b737 [2021-11-25 18:07:04,154 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:07:04,164 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i [2021-11-25 18:07:04,193 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/data/26e3ba018/ba05d4b434ae497a807052b592791e5f/FLAGa00d9b737 [2021-11-25 18:07:04,375 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/data/26e3ba018/ba05d4b434ae497a807052b592791e5f [2021-11-25 18:07:04,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:07:04,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:07:04,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:07:04,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:07:04,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:07:04,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:07:04" (1/1) ... [2021-11-25 18:07:04,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7872d1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:04, skipping insertion in model container [2021-11-25 18:07:04,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:07:04" (1/1) ... [2021-11-25 18:07:04,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:07:04,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:07:04,936 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[33021,33034] [2021-11-25 18:07:05,111 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[45234,45247] [2021-11-25 18:07:05,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:07:05,157 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-25 18:07:05,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@75d55d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:05, skipping insertion in model container [2021-11-25 18:07:05,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:07:05,159 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 18:07:05,162 INFO L158 Benchmark]: Toolchain (without parser) took 781.81ms. Allocated memory is still 107.0MB. Free memory was 61.4MB in the beginning and 68.8MB in the end (delta: -7.4MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2021-11-25 18:07:05,163 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 107.0MB. Free memory is still 80.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:07:05,165 INFO L158 Benchmark]: CACSL2BoogieTranslator took 772.63ms. Allocated memory is still 107.0MB. Free memory was 61.2MB in the beginning and 68.8MB in the end (delta: -7.6MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2021-11-25 18:07:05,167 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 107.0MB. Free memory is still 80.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 772.63ms. Allocated memory is still 107.0MB. Free memory was 61.2MB in the beginning and 68.8MB in the end (delta: -7.6MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 766]: 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3011b5baaaedb6c621e2913d841379eae3b8a9da7212e43b784fc8c1004eda96 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:07:07,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:07:07,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:07:07,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:07:07,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:07:07,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:07:07,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:07:07,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:07:07,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:07:07,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:07:07,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:07:07,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:07:07,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:07:07,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:07:07,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:07:07,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:07:07,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:07:07,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:07:07,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:07:07,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:07:07,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:07:07,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:07:07,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:07:07,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:07:07,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:07:07,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:07:07,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:07:07,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:07:07,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:07:07,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:07:07,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:07:07,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:07:07,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:07:07,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:07:07,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:07:07,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:07:07,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:07:07,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:07:07,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:07:07,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:07:07,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:07:07,462 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 18:07:07,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:07:07,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:07:07,508 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:07:07,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:07:07,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:07:07,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:07:07,510 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:07:07,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:07:07,510 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:07:07,511 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:07:07,512 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:07:07,512 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:07:07,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:07:07,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:07:07,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:07:07,514 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:07:07,514 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:07:07,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:07:07,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:07:07,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:07:07,515 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:07:07,515 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:07:07,516 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:07:07,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:07:07,516 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:07:07,516 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:07:07,517 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:07:07,517 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:07:07,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:07:07,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:07:07,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:07:07,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:07:07,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:07:07,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:07:07,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:07:07,519 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:07:07,520 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:07:07,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:07:07,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:07:07,520 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3011b5baaaedb6c621e2913d841379eae3b8a9da7212e43b784fc8c1004eda96 [2021-11-25 18:07:07,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:07:07,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:07:07,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:07:07,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:07:07,943 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:07:07,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i [2021-11-25 18:07:08,012 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/data/5d4e55cff/fa8e0605e4d54bce8c6a945ad49e8e3b/FLAG44e236eeb [2021-11-25 18:07:08,756 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:07:08,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i [2021-11-25 18:07:08,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/data/5d4e55cff/fa8e0605e4d54bce8c6a945ad49e8e3b/FLAG44e236eeb [2021-11-25 18:07:09,026 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/data/5d4e55cff/fa8e0605e4d54bce8c6a945ad49e8e3b [2021-11-25 18:07:09,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:07:09,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:07:09,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:07:09,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:07:09,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:07:09,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:09,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e48538b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09, skipping insertion in model container [2021-11-25 18:07:09,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:09,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:07:09,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:07:09,520 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[33021,33034] [2021-11-25 18:07:09,628 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[45234,45247] [2021-11-25 18:07:09,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:07:09,657 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 18:07:09,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:07:09,696 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[33021,33034] [2021-11-25 18:07:09,763 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[45234,45247] [2021-11-25 18:07:09,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:07:09,777 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:07:09,803 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[33021,33034] [2021-11-25 18:07:09,883 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_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test8-2.i[45234,45247] [2021-11-25 18:07:09,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:07:09,979 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:07:09,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09 WrapperNode [2021-11-25 18:07:09,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:07:09,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:07:09,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:07:09,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:07:09,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:10,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:10,128 INFO L137 Inliner]: procedures = 180, calls = 348, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1175 [2021-11-25 18:07:10,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:07:10,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:07:10,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:07:10,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:07:10,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:10,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:10,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:10,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:10,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:10,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:10,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:10,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:07:10,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:07:10,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:07:10,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:07:10,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (1/1) ... [2021-11-25 18:07:10,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:07:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:10,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:07:10,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:07:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 18:07:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 18:07:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:07:10,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:07:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 18:07:10,417 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 18:07:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure test_int [2021-11-25 18:07:10,417 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int [2021-11-25 18:07:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:07:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:07:10,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:07:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:07:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 18:07:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:07:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:07:10,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 18:07:10,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:07:10,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:07:10,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:07:10,695 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:07:10,697 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:07:10,701 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 18:07:15,912 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:07:15,927 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:07:15,927 INFO L301 CfgBuilder]: Removed 71 assume(true) statements. [2021-11-25 18:07:15,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:07:15 BoogieIcfgContainer [2021-11-25 18:07:15,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:07:15,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:07:15,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:07:15,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:07:15,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:07:09" (1/3) ... [2021-11-25 18:07:15,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b8b6ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:07:15, skipping insertion in model container [2021-11-25 18:07:15,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:09" (2/3) ... [2021-11-25 18:07:15,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b8b6ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:07:15, skipping insertion in model container [2021-11-25 18:07:15,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:07:15" (3/3) ... [2021-11-25 18:07:15,939 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test8-2.i [2021-11-25 18:07:15,944 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:07:15,945 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 641 error locations. [2021-11-25 18:07:15,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:07:15,995 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:07:15,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 641 error locations. [2021-11-25 18:07:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 1296 states, 634 states have (on average 2.2539432176656153) internal successors, (1429), 1287 states have internal predecessors, (1429), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-25 18:07:16,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 18:07:16,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:16,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 18:07:16,039 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash 132136, now seen corresponding path program 1 times [2021-11-25 18:07:16,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:16,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033575573] [2021-11-25 18:07:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:16,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:16,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:16,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:16,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:07:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:16,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:07:16,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:16,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:16,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:16,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:16,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033575573] [2021-11-25 18:07:16,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033575573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:16,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:16,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:07:16,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222940583] [2021-11-25 18:07:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:16,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:16,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:16,404 INFO L87 Difference]: Start difference. First operand has 1296 states, 634 states have (on average 2.2539432176656153) internal successors, (1429), 1287 states have internal predecessors, (1429), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 6 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:18,652 INFO L93 Difference]: Finished difference Result 1476 states and 1582 transitions. [2021-11-25 18:07:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-25 18:07:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:18,680 INFO L225 Difference]: With dead ends: 1476 [2021-11-25 18:07:18,680 INFO L226 Difference]: Without dead ends: 1474 [2021-11-25 18:07:18,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:18,686 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 1162 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:18,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1166 Valid, 1048 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 18:07:18,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-11-25 18:07:18,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1285. [2021-11-25 18:07:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 637 states have (on average 2.111459968602826) internal successors, (1345), 1275 states have internal predecessors, (1345), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 18:07:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1387 transitions. [2021-11-25 18:07:18,836 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1387 transitions. Word has length 3 [2021-11-25 18:07:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:18,837 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 1387 transitions. [2021-11-25 18:07:18,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1387 transitions. [2021-11-25 18:07:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 18:07:18,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:18,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 18:07:18,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-25 18:07:19,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:19,058 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash 132137, now seen corresponding path program 1 times [2021-11-25 18:07:19,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:19,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492960433] [2021-11-25 18:07:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:19,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:19,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:19,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:19,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:07:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:19,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:07:19,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:19,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:19,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:19,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:19,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492960433] [2021-11-25 18:07:19,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492960433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:19,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:19,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:07:19,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281328341] [2021-11-25 18:07:19,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:19,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:19,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:19,265 INFO L87 Difference]: Start difference. First operand 1285 states and 1387 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:22,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:22,915 INFO L93 Difference]: Finished difference Result 1877 states and 2020 transitions. [2021-11-25 18:07:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:22,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-25 18:07:22,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:22,927 INFO L225 Difference]: With dead ends: 1877 [2021-11-25 18:07:22,927 INFO L226 Difference]: Without dead ends: 1877 [2021-11-25 18:07:22,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:22,930 INFO L933 BasicCegarLoop]: 1090 mSDtfsCounter, 631 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:22,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 1840 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-25 18:07:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-11-25 18:07:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1489. [2021-11-25 18:07:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 841 states have (on average 2.097502972651605) internal successors, (1764), 1478 states have internal predecessors, (1764), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-25 18:07:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1808 transitions. [2021-11-25 18:07:22,989 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1808 transitions. Word has length 3 [2021-11-25 18:07:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:22,990 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 1808 transitions. [2021-11-25 18:07:22,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1808 transitions. [2021-11-25 18:07:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:07:22,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:22,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:23,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:23,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:23,204 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1773817970, now seen corresponding path program 1 times [2021-11-25 18:07:23,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:23,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179727174] [2021-11-25 18:07:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:23,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:23,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:23,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:23,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:07:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:07:23,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:23,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:23,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:07:23,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:07:23,521 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:07:23,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:07:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:23,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:23,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:23,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179727174] [2021-11-25 18:07:23,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179727174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:23,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:23,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:07:23,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873484687] [2021-11-25 18:07:23,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:23,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:07:23,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:23,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:07:23,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:23,550 INFO L87 Difference]: Start difference. First operand 1489 states and 1808 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:27,104 INFO L93 Difference]: Finished difference Result 1671 states and 1997 transitions. [2021-11-25 18:07:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:07:27,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:07:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:27,114 INFO L225 Difference]: With dead ends: 1671 [2021-11-25 18:07:27,114 INFO L226 Difference]: Without dead ends: 1671 [2021-11-25 18:07:27,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:27,116 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 2605 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2611 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:27,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2611 Valid, 645 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 18:07:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-11-25 18:07:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1274. [2021-11-25 18:07:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 637 states have (on average 2.0926216640502355) internal successors, (1333), 1264 states have internal predecessors, (1333), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 18:07:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1375 transitions. [2021-11-25 18:07:27,156 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1375 transitions. Word has length 7 [2021-11-25 18:07:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:27,159 INFO L470 AbstractCegarLoop]: Abstraction has 1274 states and 1375 transitions. [2021-11-25 18:07:27,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:27,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1375 transitions. [2021-11-25 18:07:27,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:07:27,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:27,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:27,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:27,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:27,372 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:27,374 INFO L85 PathProgramCache]: Analyzing trace with hash -846217710, now seen corresponding path program 1 times [2021-11-25 18:07:27,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:27,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734700883] [2021-11-25 18:07:27,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:27,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:27,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:27,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:27,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:07:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:27,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:07:27,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:27,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:27,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:27,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:27,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734700883] [2021-11-25 18:07:27,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734700883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:27,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:27,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:07:27,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306783653] [2021-11-25 18:07:27,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:27,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:27,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:27,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:27,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:27,565 INFO L87 Difference]: Start difference. First operand 1274 states and 1375 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:29,562 INFO L93 Difference]: Finished difference Result 1601 states and 1729 transitions. [2021-11-25 18:07:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:29,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 18:07:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:29,570 INFO L225 Difference]: With dead ends: 1601 [2021-11-25 18:07:29,571 INFO L226 Difference]: Without dead ends: 1601 [2021-11-25 18:07:29,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:29,572 INFO L933 BasicCegarLoop]: 1204 mSDtfsCounter, 988 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:29,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 1610 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 18:07:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-11-25 18:07:29,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1227. [2021-11-25 18:07:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 637 states have (on average 2.0172684458398744) internal successors, (1285), 1217 states have internal predecessors, (1285), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 18:07:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1327 transitions. [2021-11-25 18:07:29,607 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1327 transitions. Word has length 8 [2021-11-25 18:07:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:29,607 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1327 transitions. [2021-11-25 18:07:29,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1327 transitions. [2021-11-25 18:07:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:07:29,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:29,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:29,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:29,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:29,819 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:29,820 INFO L85 PathProgramCache]: Analyzing trace with hash -846217709, now seen corresponding path program 1 times [2021-11-25 18:07:29,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:29,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815215464] [2021-11-25 18:07:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:29,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:29,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:29,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:29,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:07:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:29,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:07:29,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:29,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:30,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:30,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:30,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815215464] [2021-11-25 18:07:30,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815215464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:30,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:30,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:07:30,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180383497] [2021-11-25 18:07:30,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:30,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:30,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:30,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:30,005 INFO L87 Difference]: Start difference. First operand 1227 states and 1327 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:32,556 INFO L93 Difference]: Finished difference Result 1694 states and 1828 transitions. [2021-11-25 18:07:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:32,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 18:07:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:32,567 INFO L225 Difference]: With dead ends: 1694 [2021-11-25 18:07:32,567 INFO L226 Difference]: Without dead ends: 1694 [2021-11-25 18:07:32,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:32,569 INFO L933 BasicCegarLoop]: 1421 mSDtfsCounter, 684 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:32,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 2010 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 18:07:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-11-25 18:07:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1469. [2021-11-25 18:07:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 887 states have (on average 2.0056369785794814) internal successors, (1779), 1457 states have internal predecessors, (1779), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 9 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-25 18:07:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1825 transitions. [2021-11-25 18:07:32,609 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1825 transitions. Word has length 8 [2021-11-25 18:07:32,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:32,609 INFO L470 AbstractCegarLoop]: Abstraction has 1469 states and 1825 transitions. [2021-11-25 18:07:32,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:32,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1825 transitions. [2021-11-25 18:07:32,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:07:32,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:32,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:32,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:32,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:32,822 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr534REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:32,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1255764539, now seen corresponding path program 1 times [2021-11-25 18:07:32,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:32,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533695594] [2021-11-25 18:07:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:32,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:32,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:32,824 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:32,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 18:07:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:32,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:07:32,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:33,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:33,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:33,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533695594] [2021-11-25 18:07:33,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533695594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:33,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:33,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:07:33,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946651649] [2021-11-25 18:07:33,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:33,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:33,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:33,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:33,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:33,022 INFO L87 Difference]: Start difference. First operand 1469 states and 1825 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:33,463 INFO L93 Difference]: Finished difference Result 2286 states and 2860 transitions. [2021-11-25 18:07:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 18:07:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:33,476 INFO L225 Difference]: With dead ends: 2286 [2021-11-25 18:07:33,476 INFO L226 Difference]: Without dead ends: 2286 [2021-11-25 18:07:33,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:33,479 INFO L933 BasicCegarLoop]: 1443 mSDtfsCounter, 748 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:33,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 2563 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:07:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-11-25 18:07:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1869. [2021-11-25 18:07:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1285 states have (on average 1.9883268482490273) internal successors, (2555), 1855 states have internal predecessors, (2555), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 18:07:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2605 transitions. [2021-11-25 18:07:33,558 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2605 transitions. Word has length 11 [2021-11-25 18:07:33,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:33,559 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2605 transitions. [2021-11-25 18:07:33,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:33,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2605 transitions. [2021-11-25 18:07:33,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:07:33,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:33,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:33,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:33,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:33,771 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr344REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash -680989669, now seen corresponding path program 1 times [2021-11-25 18:07:33,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:33,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457535438] [2021-11-25 18:07:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:33,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:33,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:33,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:33,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 18:07:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:33,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:07:33,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:33,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:33,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:33,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457535438] [2021-11-25 18:07:33,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457535438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:33,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:33,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:07:33,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296895081] [2021-11-25 18:07:33,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:33,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:33,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:33,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:33,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:33,960 INFO L87 Difference]: Start difference. First operand 1869 states and 2605 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:33,997 INFO L93 Difference]: Finished difference Result 1992 states and 2665 transitions. [2021-11-25 18:07:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:33,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:07:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:34,009 INFO L225 Difference]: With dead ends: 1992 [2021-11-25 18:07:34,009 INFO L226 Difference]: Without dead ends: 1992 [2021-11-25 18:07:34,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:34,010 INFO L933 BasicCegarLoop]: 1462 mSDtfsCounter, 585 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2352 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:34,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 2352 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:07:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-11-25 18:07:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1773. [2021-11-25 18:07:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1213 states have (on average 1.964550700741962) internal successors, (2383), 1759 states have internal predecessors, (2383), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 18:07:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2433 transitions. [2021-11-25 18:07:34,062 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2433 transitions. Word has length 13 [2021-11-25 18:07:34,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:34,062 INFO L470 AbstractCegarLoop]: Abstraction has 1773 states and 2433 transitions. [2021-11-25 18:07:34,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2433 transitions. [2021-11-25 18:07:34,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:07:34,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:34,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:34,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:34,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:34,278 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr639ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:34,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1323693751, now seen corresponding path program 1 times [2021-11-25 18:07:34,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:34,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209062546] [2021-11-25 18:07:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:34,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:34,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:34,281 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:34,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 18:07:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:34,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:07:34,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:34,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:07:34,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:07:34,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:07:34,555 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-25 18:07:34,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 18:07:34,615 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 18:07:34,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-25 18:07:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:34,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:34,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:34,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209062546] [2021-11-25 18:07:34,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209062546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:34,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:34,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:07:34,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219000821] [2021-11-25 18:07:34,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:34,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:07:34,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:07:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:34,643 INFO L87 Difference]: Start difference. First operand 1773 states and 2433 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:35,880 INFO L93 Difference]: Finished difference Result 2415 states and 3336 transitions. [2021-11-25 18:07:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:07:35,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-25 18:07:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:35,894 INFO L225 Difference]: With dead ends: 2415 [2021-11-25 18:07:35,894 INFO L226 Difference]: Without dead ends: 2415 [2021-11-25 18:07:35,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:35,895 INFO L933 BasicCegarLoop]: 1219 mSDtfsCounter, 461 mSDsluCounter, 2319 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 3538 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:35,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 3538 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 18:07:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-11-25 18:07:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1772. [2021-11-25 18:07:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1212 states have (on average 1.9645214521452146) internal successors, (2381), 1758 states have internal predecessors, (2381), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 18:07:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2431 transitions. [2021-11-25 18:07:35,941 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2431 transitions. Word has length 14 [2021-11-25 18:07:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:35,941 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2431 transitions. [2021-11-25 18:07:35,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:35,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2431 transitions. [2021-11-25 18:07:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:07:35,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:35,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:35,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:36,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:36,154 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:36,155 INFO L85 PathProgramCache]: Analyzing trace with hash -413650658, now seen corresponding path program 1 times [2021-11-25 18:07:36,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:36,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834842459] [2021-11-25 18:07:36,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:36,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:36,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:36,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:36,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 18:07:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:36,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:07:36,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:36,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:36,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:36,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834842459] [2021-11-25 18:07:36,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834842459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:36,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:36,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:07:36,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635560129] [2021-11-25 18:07:36,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:36,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:36,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:36,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:36,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:36,374 INFO L87 Difference]: Start difference. First operand 1772 states and 2431 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:36,402 INFO L93 Difference]: Finished difference Result 1712 states and 2345 transitions. [2021-11-25 18:07:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:36,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 18:07:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:36,411 INFO L225 Difference]: With dead ends: 1712 [2021-11-25 18:07:36,412 INFO L226 Difference]: Without dead ends: 1712 [2021-11-25 18:07:36,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:36,413 INFO L933 BasicCegarLoop]: 1219 mSDtfsCounter, 1131 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:36,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 1311 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:07:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-11-25 18:07:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1712. [2021-11-25 18:07:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1176 states have (on average 1.9515306122448979) internal successors, (2295), 1698 states have internal predecessors, (2295), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 18:07:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2345 transitions. [2021-11-25 18:07:36,458 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2345 transitions. Word has length 18 [2021-11-25 18:07:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:36,459 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 2345 transitions. [2021-11-25 18:07:36,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2345 transitions. [2021-11-25 18:07:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:07:36,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:36,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:36,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:36,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:36,671 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:36,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1913675577, now seen corresponding path program 1 times [2021-11-25 18:07:36,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:36,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214602433] [2021-11-25 18:07:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:36,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:36,673 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:36,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 18:07:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:36,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:07:36,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:36,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:36,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:36,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214602433] [2021-11-25 18:07:36,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214602433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:36,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:36,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:07:36,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836227491] [2021-11-25 18:07:36,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:36,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:07:36,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:36,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:07:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:36,884 INFO L87 Difference]: Start difference. First operand 1712 states and 2345 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:36,951 INFO L93 Difference]: Finished difference Result 1684 states and 2289 transitions. [2021-11-25 18:07:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:07:36,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 18:07:36,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:36,963 INFO L225 Difference]: With dead ends: 1684 [2021-11-25 18:07:36,963 INFO L226 Difference]: Without dead ends: 1684 [2021-11-25 18:07:36,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:36,964 INFO L933 BasicCegarLoop]: 1174 mSDtfsCounter, 1102 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:36,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1107 Valid, 2433 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:07:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-11-25 18:07:36,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1682. [2021-11-25 18:07:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1160 states have (on average 1.928448275862069) internal successors, (2237), 1668 states have internal predecessors, (2237), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 18:07:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2287 transitions. [2021-11-25 18:07:37,001 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2287 transitions. Word has length 20 [2021-11-25 18:07:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:37,001 INFO L470 AbstractCegarLoop]: Abstraction has 1682 states and 2287 transitions. [2021-11-25 18:07:37,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2287 transitions. [2021-11-25 18:07:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:07:37,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:37,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:37,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:37,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:37,219 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:37,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1224753126, now seen corresponding path program 1 times [2021-11-25 18:07:37,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:37,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67890998] [2021-11-25 18:07:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:37,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:37,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:37,220 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:37,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 18:07:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:07:37,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:37,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:37,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:37,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:37,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67890998] [2021-11-25 18:07:37,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67890998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:37,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:37,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:07:37,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934771127] [2021-11-25 18:07:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:37,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:07:37,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:07:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:37,538 INFO L87 Difference]: Start difference. First operand 1682 states and 2287 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:39,900 INFO L93 Difference]: Finished difference Result 2541 states and 3552 transitions. [2021-11-25 18:07:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:07:39,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-25 18:07:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:39,912 INFO L225 Difference]: With dead ends: 2541 [2021-11-25 18:07:39,913 INFO L226 Difference]: Without dead ends: 2541 [2021-11-25 18:07:39,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:39,914 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 2164 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2166 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:39,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2166 Valid, 1290 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 18:07:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-11-25 18:07:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1678. [2021-11-25 18:07:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1160 states have (on average 1.921551724137931) internal successors, (2229), 1664 states have internal predecessors, (2229), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 18:07:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2279 transitions. [2021-11-25 18:07:39,974 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2279 transitions. Word has length 34 [2021-11-25 18:07:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:39,976 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 2279 transitions. [2021-11-25 18:07:39,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2279 transitions. [2021-11-25 18:07:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:07:39,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:39,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:39,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:40,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:40,191 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1224753127, now seen corresponding path program 1 times [2021-11-25 18:07:40,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:40,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631690465] [2021-11-25 18:07:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:40,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:40,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:40,193 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:40,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 18:07:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:07:40,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:40,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:40,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:40,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:40,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631690465] [2021-11-25 18:07:40,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631690465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:40,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:40,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:07:40,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435031484] [2021-11-25 18:07:40,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:40,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:07:40,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:07:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:40,636 INFO L87 Difference]: Start difference. First operand 1678 states and 2279 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:44,097 INFO L93 Difference]: Finished difference Result 2089 states and 2498 transitions. [2021-11-25 18:07:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:07:44,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-25 18:07:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:44,106 INFO L225 Difference]: With dead ends: 2089 [2021-11-25 18:07:44,106 INFO L226 Difference]: Without dead ends: 2089 [2021-11-25 18:07:44,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:44,107 INFO L933 BasicCegarLoop]: 1521 mSDtfsCounter, 1298 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:44,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1298 Valid, 2787 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 18:07:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-11-25 18:07:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1674. [2021-11-25 18:07:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1160 states have (on average 1.914655172413793) internal successors, (2221), 1660 states have internal predecessors, (2221), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 18:07:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2271 transitions. [2021-11-25 18:07:44,141 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2271 transitions. Word has length 34 [2021-11-25 18:07:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:44,141 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 2271 transitions. [2021-11-25 18:07:44,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:44,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2271 transitions. [2021-11-25 18:07:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 18:07:44,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:44,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:44,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-25 18:07:44,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:44,355 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash -515146363, now seen corresponding path program 1 times [2021-11-25 18:07:44,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:44,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382255901] [2021-11-25 18:07:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:44,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:44,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:44,357 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:44,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 18:07:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:44,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:07:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:44,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:44,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:44,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382255901] [2021-11-25 18:07:44,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382255901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:44,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:44,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:07:44,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276226013] [2021-11-25 18:07:44,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:44,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:07:44,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:44,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:07:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:44,716 INFO L87 Difference]: Start difference. First operand 1674 states and 2271 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:44,763 INFO L93 Difference]: Finished difference Result 1662 states and 2251 transitions. [2021-11-25 18:07:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:07:44,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-25 18:07:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:44,771 INFO L225 Difference]: With dead ends: 1662 [2021-11-25 18:07:44,771 INFO L226 Difference]: Without dead ends: 1662 [2021-11-25 18:07:44,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:44,772 INFO L933 BasicCegarLoop]: 1168 mSDtfsCounter, 1078 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 2411 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:44,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 2411 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:07:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-11-25 18:07:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1662. [2021-11-25 18:07:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1148 states have (on average 1.9172473867595818) internal successors, (2201), 1648 states have internal predecessors, (2201), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 11 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 18:07:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2251 transitions. [2021-11-25 18:07:44,823 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2251 transitions. Word has length 52 [2021-11-25 18:07:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:44,824 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 2251 transitions. [2021-11-25 18:07:44,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2251 transitions. [2021-11-25 18:07:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 18:07:44,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:44,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:44,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:45,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:45,039 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:45,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:45,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1189287633, now seen corresponding path program 1 times [2021-11-25 18:07:45,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:45,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260468660] [2021-11-25 18:07:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:45,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:45,041 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:45,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 18:07:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:45,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:07:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:45,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:45,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:46,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:07:46,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:07:46,052 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:07:46,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:07:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:46,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:46,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:46,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260468660] [2021-11-25 18:07:46,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260468660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:46,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:46,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:07:46,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081726710] [2021-11-25 18:07:46,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:46,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:07:46,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:46,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:07:46,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:46,074 INFO L87 Difference]: Start difference. First operand 1662 states and 2251 transitions. Second operand has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:48,072 INFO L93 Difference]: Finished difference Result 1633 states and 2223 transitions. [2021-11-25 18:07:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:07:48,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-25 18:07:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:48,078 INFO L225 Difference]: With dead ends: 1633 [2021-11-25 18:07:48,079 INFO L226 Difference]: Without dead ends: 1633 [2021-11-25 18:07:48,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:48,080 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 833 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:48,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 888 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 18:07:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-11-25 18:07:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1250. [2021-11-25 18:07:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 779 states have (on average 1.8318356867779204) internal successors, (1427), 1239 states have internal predecessors, (1427), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-25 18:07:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1471 transitions. [2021-11-25 18:07:48,106 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1471 transitions. Word has length 60 [2021-11-25 18:07:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:48,106 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1471 transitions. [2021-11-25 18:07:48,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1471 transitions. [2021-11-25 18:07:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 18:07:48,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:48,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:48,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:48,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:48,339 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1859054235, now seen corresponding path program 1 times [2021-11-25 18:07:48,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:48,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092973261] [2021-11-25 18:07:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:48,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:48,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:48,342 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:48,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 18:07:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:48,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:07:48,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:48,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:48,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:07:48,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:07:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:48,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:48,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092973261] [2021-11-25 18:07:48,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092973261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:48,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:48,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:07:48,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962711558] [2021-11-25 18:07:48,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:48,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:07:48,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:48,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:07:48,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:48,857 INFO L87 Difference]: Start difference. First operand 1250 states and 1471 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:51,170 INFO L93 Difference]: Finished difference Result 1249 states and 1470 transitions. [2021-11-25 18:07:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:07:51,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-25 18:07:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:51,174 INFO L225 Difference]: With dead ends: 1249 [2021-11-25 18:07:51,175 INFO L226 Difference]: Without dead ends: 1249 [2021-11-25 18:07:51,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:07:51,175 INFO L933 BasicCegarLoop]: 1126 mSDtfsCounter, 4 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:51,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2957 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 18:07:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-11-25 18:07:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1249. [2021-11-25 18:07:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 779 states have (on average 1.8305519897304237) internal successors, (1426), 1238 states have internal predecessors, (1426), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-25 18:07:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1470 transitions. [2021-11-25 18:07:51,198 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1470 transitions. Word has length 65 [2021-11-25 18:07:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:51,198 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1470 transitions. [2021-11-25 18:07:51,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1470 transitions. [2021-11-25 18:07:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 18:07:51,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:51,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:51,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:51,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:51,426 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1859054234, now seen corresponding path program 1 times [2021-11-25 18:07:51,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:51,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293301784] [2021-11-25 18:07:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:51,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:51,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:51,429 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:51,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 18:07:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:07:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:51,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:07:51,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:07:51,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:07:51,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-25 18:07:51,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 18:07:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:51,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:51,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293301784] [2021-11-25 18:07:51,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293301784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:51,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:51,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:07:51,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223077157] [2021-11-25 18:07:51,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:51,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:07:51,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:07:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:51,975 INFO L87 Difference]: Start difference. First operand 1249 states and 1470 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:55,006 INFO L93 Difference]: Finished difference Result 1248 states and 1469 transitions. [2021-11-25 18:07:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:07:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-25 18:07:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:55,010 INFO L225 Difference]: With dead ends: 1248 [2021-11-25 18:07:55,010 INFO L226 Difference]: Without dead ends: 1248 [2021-11-25 18:07:55,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:07:55,011 INFO L933 BasicCegarLoop]: 1126 mSDtfsCounter, 2 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3018 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:55,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3018 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 18:07:55,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-11-25 18:07:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2021-11-25 18:07:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 778 states have (on average 1.8316195372750643) internal successors, (1425), 1237 states have internal predecessors, (1425), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-25 18:07:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1469 transitions. [2021-11-25 18:07:55,033 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1469 transitions. Word has length 65 [2021-11-25 18:07:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:55,033 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1469 transitions. [2021-11-25 18:07:55,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1469 transitions. [2021-11-25 18:07:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 18:07:55,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:55,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:55,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:55,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:55,248 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:55,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:55,249 INFO L85 PathProgramCache]: Analyzing trace with hash 827014060, now seen corresponding path program 1 times [2021-11-25 18:07:55,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:55,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113012679] [2021-11-25 18:07:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:55,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:55,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:55,250 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:55,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 18:07:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:55,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:07:55,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:55,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:55,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:55,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113012679] [2021-11-25 18:07:55,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113012679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:55,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:55,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:07:55,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477852394] [2021-11-25 18:07:55,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:55,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:07:55,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:07:55,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:55,682 INFO L87 Difference]: Start difference. First operand 1248 states and 1469 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:07:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:55,738 INFO L93 Difference]: Finished difference Result 1251 states and 1473 transitions. [2021-11-25 18:07:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:07:55,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-11-25 18:07:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:55,752 INFO L225 Difference]: With dead ends: 1251 [2021-11-25 18:07:55,753 INFO L226 Difference]: Without dead ends: 1251 [2021-11-25 18:07:55,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:55,754 INFO L933 BasicCegarLoop]: 1126 mSDtfsCounter, 2 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:55,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3373 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:07:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-25 18:07:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1251. [2021-11-25 18:07:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 780 states have (on average 1.8307692307692307) internal successors, (1428), 1240 states have internal predecessors, (1428), 22 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (23), 8 states have call predecessors, (23), 22 states have call successors, (23) [2021-11-25 18:07:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1473 transitions. [2021-11-25 18:07:55,806 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1473 transitions. Word has length 73 [2021-11-25 18:07:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:55,806 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 1473 transitions. [2021-11-25 18:07:55,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:07:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1473 transitions. [2021-11-25 18:07:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 18:07:55,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:55,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:55,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:56,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:56,025 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:56,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash 505961995, now seen corresponding path program 1 times [2021-11-25 18:07:56,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:56,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447206463] [2021-11-25 18:07:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:56,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:56,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:56,027 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:56,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 18:07:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:56,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:07:56,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:56,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:07:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:56,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:56,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447206463] [2021-11-25 18:07:56,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447206463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:07:56,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1643997271] [2021-11-25 18:07:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:56,691 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:07:56,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:07:56,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:07:56,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-25 18:07:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:57,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:07:57,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:57,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:07:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:57,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1643997271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:07:57,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276354921] [2021-11-25 18:07:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:57,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:57,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:57,412 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:57,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 18:07:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:57,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:07:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:57,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:07:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:57,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276354921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:07:57,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:07:57,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 18:07:57,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691210051] [2021-11-25 18:07:57,959 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:07:57,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:07:57,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:07:57,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:07:57,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:07:57,961 INFO L87 Difference]: Start difference. First operand 1251 states and 1473 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:07:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:58,185 INFO L93 Difference]: Finished difference Result 1263 states and 1490 transitions. [2021-11-25 18:07:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:07:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2021-11-25 18:07:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:58,191 INFO L225 Difference]: With dead ends: 1263 [2021-11-25 18:07:58,191 INFO L226 Difference]: Without dead ends: 1263 [2021-11-25 18:07:58,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:07:58,192 INFO L933 BasicCegarLoop]: 1127 mSDtfsCounter, 15 mSDsluCounter, 4491 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 5618 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:58,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 5618 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:07:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-11-25 18:07:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1261. [2021-11-25 18:07:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 789 states have (on average 1.8288973384030418) internal successors, (1443), 1249 states have internal predecessors, (1443), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (23), 8 states have call predecessors, (23), 22 states have call successors, (23) [2021-11-25 18:07:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1488 transitions. [2021-11-25 18:07:58,221 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1488 transitions. Word has length 74 [2021-11-25 18:07:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:58,222 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 1488 transitions. [2021-11-25 18:07:58,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:07:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1488 transitions. [2021-11-25 18:07:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:07:58,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:58,228 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:58,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:58,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:58,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:58,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:07:58,844 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:07:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash 279993196, now seen corresponding path program 2 times [2021-11-25 18:07:58,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:07:58,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251887285] [2021-11-25 18:07:58,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:07:58,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:07:58,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:07:58,847 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:07:58,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 18:07:59,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:07:59,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:07:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:07:59,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:59,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:07:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:59,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:07:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251887285] [2021-11-25 18:07:59,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251887285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:07:59,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1163762363] [2021-11-25 18:07:59,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:07:59,764 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:07:59,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:07:59,765 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:07:59,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-25 18:08:01,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:08:01,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:01,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:08:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:01,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:01,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1163762363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:01,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683880570] [2021-11-25 18:08:01,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:08:01,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:01,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:01,369 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:01,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 18:08:30,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:08:30,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:30,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:08:30,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:31,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:31,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683880570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:31,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:08:31,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-25 18:08:31,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107915649] [2021-11-25 18:08:31,414 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:31,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:08:31,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:08:31,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:08:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:08:31,416 INFO L87 Difference]: Start difference. First operand 1261 states and 1488 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:08:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:32,220 INFO L93 Difference]: Finished difference Result 1282 states and 1515 transitions. [2021-11-25 18:08:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:08:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-11-25 18:08:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:32,224 INFO L225 Difference]: With dead ends: 1282 [2021-11-25 18:08:32,224 INFO L226 Difference]: Without dead ends: 1276 [2021-11-25 18:08:32,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 18:08:32,228 INFO L933 BasicCegarLoop]: 1129 mSDtfsCounter, 48 mSDsluCounter, 8994 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 10123 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:32,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 10123 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:08:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-11-25 18:08:32,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1270. [2021-11-25 18:08:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 798 states have (on average 1.8220551378446115) internal successors, (1454), 1258 states have internal predecessors, (1454), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (23), 8 states have call predecessors, (23), 22 states have call successors, (23) [2021-11-25 18:08:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1499 transitions. [2021-11-25 18:08:32,251 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1499 transitions. Word has length 77 [2021-11-25 18:08:32,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:32,251 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 1499 transitions. [2021-11-25 18:08:32,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:08:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1499 transitions. [2021-11-25 18:08:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 18:08:32,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:32,252 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:32,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:32,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-25 18:08:32,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:32,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:08:32,853 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 637 more)] === [2021-11-25 18:08:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash -183892212, now seen corresponding path program 3 times [2021-11-25 18:08:32,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:08:32,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097261214] [2021-11-25 18:08:32,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:08:32,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:08:32,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:08:32,855 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:08:32,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-25 18:08:33,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 18:08:33,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:33,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:08:33,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:33,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:34,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:08:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097261214] [2021-11-25 18:08:34,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097261214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [342800008] [2021-11-25 18:08:34,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:08:34,654 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:08:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:08:34,669 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:08:34,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-25 18:08:38,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 18:08:38,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:38,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:08:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:38,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:39,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [342800008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:39,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873797555] [2021-11-25 18:08:39,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:08:39,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:39,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:39,328 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:39,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc9a1870-5ce5-4ac1-b9f5-6b938f430eb3/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process