./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:35:51,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:35:51,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:35:51,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:35:51,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:35:51,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:35:51,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:35:51,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:35:51,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:35:51,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:35:51,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:35:51,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:35:51,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:35:51,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:35:51,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:35:51,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:35:51,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:35:51,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:35:51,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:35:51,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:35:51,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:35:51,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:35:51,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:35:51,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:35:51,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:35:51,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:35:51,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:35:51,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:35:51,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:35:51,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:35:51,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:35:51,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:35:51,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:35:51,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:35:51,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:35:51,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:35:51,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:35:51,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:35:51,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:35:51,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:35:51,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:35:51,201 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 08:35:51,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:35:51,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:35:51,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:35:51,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:35:51,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:35:51,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:35:51,252 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:35:51,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:35:51,252 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:35:51,252 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 08:35:51,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:35:51,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:35:51,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:35:51,254 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 08:35:51,254 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 08:35:51,255 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 08:35:51,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:35:51,255 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 08:35:51,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:35:51,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:35:51,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:35:51,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:35:51,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:35:51,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:35:51,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:35:51,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:35:51,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:35:51,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:35:51,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:35:51,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2021-11-09 08:35:51,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:35:51,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:35:51,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:35:51,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:35:51,537 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:35:51,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-09 08:35:51,612 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/data/68d001683/5a4ce0b854a84f90a132bdcb4b41ddcf/FLAGa605f7228 [2021-11-09 08:35:52,358 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:35:52,359 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-09 08:35:52,393 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/data/68d001683/5a4ce0b854a84f90a132bdcb4b41ddcf/FLAGa605f7228 [2021-11-09 08:35:52,488 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/data/68d001683/5a4ce0b854a84f90a132bdcb4b41ddcf [2021-11-09 08:35:52,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:35:52,492 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 08:35:52,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:35:52,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:35:52,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:35:52,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:35:52" (1/1) ... [2021-11-09 08:35:52,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a16036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:52, skipping insertion in model container [2021-11-09 08:35:52,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:35:52" (1/1) ... [2021-11-09 08:35:52,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:35:52,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:35:53,113 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-09 08:35:53,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:35:53,413 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) [2021-11-09 08:35:53,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36ede03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:53, skipping insertion in model container [2021-11-09 08:35:53,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:35:53,414 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-09 08:35:53,416 INFO L168 Benchmark]: Toolchain (without parser) took 923.09 ms. Allocated memory is still 107.0 MB. Free memory was 71.5 MB in the beginning and 61.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:53,417 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 107.0 MB. Free memory is still 63.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:35:53,418 INFO L168 Benchmark]: CACSL2BoogieTranslator took 918.17 ms. Allocated memory is still 107.0 MB. Free memory was 71.3 MB in the beginning and 61.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:53,420 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 107.0 MB. Free memory is still 63.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 918.17 ms. Allocated memory is still 107.0 MB. Free memory was 71.3 MB in the beginning and 61.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:35:55,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:35:55,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:35:55,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:35:55,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:35:55,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:35:55,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:35:55,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:35:55,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:35:55,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:35:55,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:35:55,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:35:55,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:35:55,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:35:55,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:35:55,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:35:55,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:35:55,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:35:55,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:35:55,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:35:55,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:35:55,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:35:55,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:35:55,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:35:55,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:35:55,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:35:55,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:35:55,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:35:55,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:35:55,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:35:55,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:35:55,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:35:55,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:35:55,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:35:55,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:35:55,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:35:55,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:35:55,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:35:55,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:35:55,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:35:55,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:35:55,881 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-09 08:35:55,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:35:55,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:35:55,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:35:55,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:35:55,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:35:55,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:35:55,940 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:35:55,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:35:55,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:35:55,941 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 08:35:55,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:35:55,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:35:55,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:35:55,942 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 08:35:55,943 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 08:35:55,943 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 08:35:55,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:35:55,943 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 08:35:55,943 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 08:35:55,944 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 08:35:55,944 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:35:55,944 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:35:55,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:35:55,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:35:55,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:35:55,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:35:55,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:35:55,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:35:55,946 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 08:35:55,946 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 08:35:55,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:35:55,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 08:35:55,947 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_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2021-11-09 08:35:56,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:35:56,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:35:56,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:35:56,376 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:35:56,376 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:35:56,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-09 08:35:56,450 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/data/e67ad6dbd/578e7b6fc2a54e29b664b87a4e41f02f/FLAGdff74b313 [2021-11-09 08:35:57,215 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:35:57,215 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-09 08:35:57,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/data/e67ad6dbd/578e7b6fc2a54e29b664b87a4e41f02f/FLAGdff74b313 [2021-11-09 08:35:57,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/data/e67ad6dbd/578e7b6fc2a54e29b664b87a4e41f02f [2021-11-09 08:35:57,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:35:57,372 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 08:35:57,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:35:57,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:35:57,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:35:57,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:35:57" (1/1) ... [2021-11-09 08:35:57,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b390884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:57, skipping insertion in model container [2021-11-09 08:35:57,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:35:57" (1/1) ... [2021-11-09 08:35:57,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:35:57,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:35:57,988 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-09 08:35:58,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:35:58,341 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-09 08:35:58,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:35:58,381 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-09 08:35:58,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:35:58,586 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:35:58,633 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-09 08:35:58,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:35:58,854 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:35:58,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:58 WrapperNode [2021-11-09 08:35:58,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:35:58,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:35:58,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:35:58,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:35:58,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:58" (1/1) ... [2021-11-09 08:35:58,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:58" (1/1) ... [2021-11-09 08:35:58,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:58" (1/1) ... [2021-11-09 08:35:58,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:58" (1/1) ... [2021-11-09 08:35:59,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:58" (1/1) ... [2021-11-09 08:35:59,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:58" (1/1) ... [2021-11-09 08:35:59,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:58" (1/1) ... [2021-11-09 08:35:59,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:35:59,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:35:59,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:35:59,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:35:59,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:58" (1/1) ... [2021-11-09 08:35:59,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:35:59,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:59,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:35:59,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:35:59,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 08:35:59,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:35:59,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 08:35:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 08:35:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 08:35:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 08:35:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 08:35:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 08:35:59,325 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 08:35:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-09 08:35:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-09 08:35:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 08:35:59,326 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-09 08:35:59,326 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-09 08:35:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-09 08:35:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-09 08:35:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-09 08:35:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-09 08:35:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-09 08:35:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-09 08:35:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-09 08:35:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-09 08:35:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-09 08:35:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-09 08:35:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-09 08:35:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-09 08:35:59,329 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-09 08:35:59,329 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-09 08:35:59,329 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-09 08:35:59,329 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-09 08:35:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-09 08:35:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-09 08:35:59,330 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-09 08:35:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-09 08:35:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-09 08:35:59,331 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-09 08:35:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-09 08:35:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-09 08:35:59,332 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-09 08:35:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-09 08:35:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-09 08:35:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-09 08:35:59,333 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-09 08:35:59,334 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-09 08:35:59,334 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-09 08:35:59,334 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-09 08:35:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-09 08:35:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-09 08:35:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-09 08:35:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-09 08:35:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-09 08:35:59,335 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-09 08:35:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-09 08:35:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-09 08:35:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-09 08:35:59,336 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-09 08:35:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-09 08:35:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-09 08:35:59,337 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-09 08:35:59,338 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-09 08:35:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-09 08:35:59,339 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-09 08:35:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-09 08:35:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-09 08:35:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 08:35:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 08:35:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 08:35:59,340 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 08:35:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 08:35:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 08:35:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 08:35:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 08:35:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 08:35:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 08:35:59,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 08:35:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 08:35:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 08:35:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 08:35:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 08:35:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 08:35:59,342 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 08:35:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 08:35:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 08:35:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 08:35:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 08:35:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 08:35:59,343 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 08:35:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 08:35:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 08:35:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 08:35:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 08:35:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 08:35:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 08:35:59,344 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 08:35:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 08:35:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 08:35:59,345 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 08:35:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 08:35:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 08:35:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 08:35:59,346 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 08:35:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 08:35:59,347 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 08:35:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 08:35:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 08:35:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 08:35:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 08:35:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 08:35:59,348 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 08:35:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 08:35:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 08:35:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 08:35:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 08:35:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 08:35:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 08:35:59,349 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 08:35:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 08:35:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 08:35:59,350 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 08:35:59,351 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 08:35:59,352 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 08:35:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 08:35:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 08:35:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 08:35:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 08:35:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 08:35:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 08:35:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 08:35:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 08:35:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 08:35:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 08:35:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 08:35:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 08:35:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 08:35:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 08:35:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 08:35:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 08:35:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 08:35:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 08:35:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 08:35:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 08:35:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 08:35:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 08:35:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 08:35:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 08:35:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 08:35:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 08:35:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 08:35:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 08:35:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 08:35:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 08:35:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 08:35:59,367 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 08:35:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 08:35:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 08:35:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 08:35:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 08:35:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 08:35:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 08:35:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 08:35:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 08:35:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 08:35:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 08:35:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 08:35:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 08:35:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 08:35:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 08:35:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 08:35:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 08:35:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 08:35:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 08:35:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 08:35:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 08:35:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 08:35:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 08:35:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:35:59,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-09 08:35:59,372 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-09 08:35:59,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 08:35:59,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:35:59,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 08:35:59,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 08:35:59,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-09 08:35:59,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 08:35:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 08:35:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-09 08:35:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:35:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 08:35:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 08:35:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:35:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 08:35:59,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-09 08:36:00,075 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-09 08:36:11,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:36:11,464 INFO L299 CfgBuilder]: Removed 168 assume(true) statements. [2021-11-09 08:36:11,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:36:11 BoogieIcfgContainer [2021-11-09 08:36:11,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:36:11,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:36:11,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:36:11,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:36:11,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:35:57" (1/3) ... [2021-11-09 08:36:11,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627744ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:36:11, skipping insertion in model container [2021-11-09 08:36:11,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:58" (2/3) ... [2021-11-09 08:36:11,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627744ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:36:11, skipping insertion in model container [2021-11-09 08:36:11,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:36:11" (3/3) ... [2021-11-09 08:36:11,481 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-3.i [2021-11-09 08:36:11,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:36:11,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1193 error locations. [2021-11-09 08:36:11,543 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:36:11,559 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 [2021-11-09 08:36:11,564 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1193 error locations. [2021-11-09 08:36:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 2442 states, 1233 states have (on average 2.227088402270884) internal successors, (2746), 2424 states have internal predecessors, (2746), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-09 08:36:11,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 08:36:11,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:11,635 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:11,635 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:11,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1848007294, now seen corresponding path program 1 times [2021-11-09 08:36:11,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:11,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029371903] [2021-11-09 08:36:11,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:11,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:11,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:11,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:11,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 08:36:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:11,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:36:11,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:12,109 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 [2021-11-09 08:36:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:12,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:12,171 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:12,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029371903] [2021-11-09 08:36:12,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029371903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:12,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:12,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 08:36:12,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450148671] [2021-11-09 08:36:12,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:36:12,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:12,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:36:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:12,203 INFO L87 Difference]: Start difference. First operand has 2442 states, 1233 states have (on average 2.227088402270884) internal successors, (2746), 2424 states have internal predecessors, (2746), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:18,047 INFO L93 Difference]: Finished difference Result 3286 states and 3488 transitions. [2021-11-09 08:36:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:18,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-09 08:36:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:18,093 INFO L225 Difference]: With dead ends: 3286 [2021-11-09 08:36:18,093 INFO L226 Difference]: Without dead ends: 3283 [2021-11-09 08:36:18,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:18,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-11-09 08:36:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2583. [2021-11-09 08:36:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 1399 states have (on average 2.0664760543245175) internal successors, (2891), 2564 states have internal predecessors, (2891), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 2926 transitions. [2021-11-09 08:36:18,267 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 2926 transitions. Word has length 7 [2021-11-09 08:36:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:18,269 INFO L470 AbstractCegarLoop]: Abstraction has 2583 states and 2926 transitions. [2021-11-09 08:36:18,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 2926 transitions. [2021-11-09 08:36:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 08:36:18,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:18,273 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:18,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:18,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:18,486 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1848007293, now seen corresponding path program 1 times [2021-11-09 08:36:18,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:18,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167777452] [2021-11-09 08:36:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:18,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:18,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:18,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:18,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 08:36:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:18,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:36:18,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:18,804 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 [2021-11-09 08:36:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:18,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:18,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:18,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167777452] [2021-11-09 08:36:18,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167777452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:18,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:18,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 08:36:18,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926527019] [2021-11-09 08:36:18,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:18,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:18,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:18,910 INFO L87 Difference]: Start difference. First operand 2583 states and 2926 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:30,541 INFO L93 Difference]: Finished difference Result 4061 states and 4523 transitions. [2021-11-09 08:36:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:30,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-09 08:36:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:30,563 INFO L225 Difference]: With dead ends: 4061 [2021-11-09 08:36:30,563 INFO L226 Difference]: Without dead ends: 4061 [2021-11-09 08:36:30,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-11-09 08:36:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 2747. [2021-11-09 08:36:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 1575 states have (on average 2.0526984126984127) internal successors, (3233), 2728 states have internal predecessors, (3233), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3268 transitions. [2021-11-09 08:36:30,647 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3268 transitions. Word has length 7 [2021-11-09 08:36:30,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:30,647 INFO L470 AbstractCegarLoop]: Abstraction has 2747 states and 3268 transitions. [2021-11-09 08:36:30,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3268 transitions. [2021-11-09 08:36:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:36:30,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:30,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:30,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:30,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:30,863 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash 515316259, now seen corresponding path program 1 times [2021-11-09 08:36:30,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:30,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794526496] [2021-11-09 08:36:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:30,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:30,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:30,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:30,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 08:36:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:31,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:36:31,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:31,145 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 [2021-11-09 08:36:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:31,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:31,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:31,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794526496] [2021-11-09 08:36:31,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794526496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:31,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:31,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 08:36:31,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240724478] [2021-11-09 08:36:31,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:36:31,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:36:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:31,204 INFO L87 Difference]: Start difference. First operand 2747 states and 3268 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:35,340 INFO L93 Difference]: Finished difference Result 3485 states and 4006 transitions. [2021-11-09 08:36:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-09 08:36:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:35,359 INFO L225 Difference]: With dead ends: 3485 [2021-11-09 08:36:35,360 INFO L226 Difference]: Without dead ends: 3485 [2021-11-09 08:36:35,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:36:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-11-09 08:36:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2656. [2021-11-09 08:36:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 1575 states have (on average 1.9733333333333334) internal successors, (3108), 2637 states have internal predecessors, (3108), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:35,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 3143 transitions. [2021-11-09 08:36:35,436 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 3143 transitions. Word has length 12 [2021-11-09 08:36:35,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:35,437 INFO L470 AbstractCegarLoop]: Abstraction has 2656 states and 3143 transitions. [2021-11-09 08:36:35,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 3143 transitions. [2021-11-09 08:36:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:36:35,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:35,438 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:35,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:35,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:35,652 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:35,653 INFO L85 PathProgramCache]: Analyzing trace with hash 515316260, now seen corresponding path program 1 times [2021-11-09 08:36:35,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:35,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411840520] [2021-11-09 08:36:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:35,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:35,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:35,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 08:36:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:35,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:36:35,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:35,980 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 [2021-11-09 08:36:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:36,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:36,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:36,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411840520] [2021-11-09 08:36:36,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411840520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:36,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:36,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 08:36:36,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571844824] [2021-11-09 08:36:36,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:36,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:36,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:36,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:36,127 INFO L87 Difference]: Start difference. First operand 2656 states and 3143 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:47,256 INFO L93 Difference]: Finished difference Result 3611 states and 4034 transitions. [2021-11-09 08:36:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:47,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-09 08:36:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:47,274 INFO L225 Difference]: With dead ends: 3611 [2021-11-09 08:36:47,275 INFO L226 Difference]: Without dead ends: 3611 [2021-11-09 08:36:47,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-11-09 08:36:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2648. [2021-11-09 08:36:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1577 states have (on average 1.9581483830057071) internal successors, (3088), 2629 states have internal predecessors, (3088), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 3123 transitions. [2021-11-09 08:36:47,347 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 3123 transitions. Word has length 12 [2021-11-09 08:36:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:47,348 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 3123 transitions. [2021-11-09 08:36:47,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 3123 transitions. [2021-11-09 08:36:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:36:47,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:47,349 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:47,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:47,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:47,562 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr658REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:47,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:47,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1098922193, now seen corresponding path program 1 times [2021-11-09 08:36:47,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:47,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849614246] [2021-11-09 08:36:47,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:47,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:47,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:47,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:47,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 08:36:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:36:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:47,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:47,900 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:47,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849614246] [2021-11-09 08:36:47,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849614246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:47,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:47,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 08:36:47,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959989632] [2021-11-09 08:36:47,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:47,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:47,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:47,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:47,907 INFO L87 Difference]: Start difference. First operand 2648 states and 3123 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:47,975 INFO L93 Difference]: Finished difference Result 2606 states and 3080 transitions. [2021-11-09 08:36:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:47,976 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-09 08:36:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:47,991 INFO L225 Difference]: With dead ends: 2606 [2021-11-09 08:36:47,991 INFO L226 Difference]: Without dead ends: 2606 [2021-11-09 08:36:47,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-11-09 08:36:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2606. [2021-11-09 08:36:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 1559 states have (on average 1.9531751122514431) internal successors, (3045), 2587 states have internal predecessors, (3045), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3080 transitions. [2021-11-09 08:36:48,065 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3080 transitions. Word has length 15 [2021-11-09 08:36:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:48,066 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 3080 transitions. [2021-11-09 08:36:48,066 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3080 transitions. [2021-11-09 08:36:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 08:36:48,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:48,068 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:48,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:48,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:48,280 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr682REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash -497671989, now seen corresponding path program 1 times [2021-11-09 08:36:48,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:48,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25629597] [2021-11-09 08:36:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:48,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:48,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:48,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:48,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 08:36:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:48,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:36:48,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:48,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:48,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:48,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25629597] [2021-11-09 08:36:48,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25629597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:48,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:48,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 08:36:48,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677984633] [2021-11-09 08:36:48,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:36:48,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:48,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:36:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:36:48,622 INFO L87 Difference]: Start difference. First operand 2606 states and 3080 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:48,709 INFO L93 Difference]: Finished difference Result 2585 states and 3052 transitions. [2021-11-09 08:36:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:48,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-09 08:36:48,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:48,723 INFO L225 Difference]: With dead ends: 2585 [2021-11-09 08:36:48,723 INFO L226 Difference]: Without dead ends: 2585 [2021-11-09 08:36:48,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:36:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-11-09 08:36:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2584. [2021-11-09 08:36:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 1551 states have (on average 1.9445519019987105) internal successors, (3016), 2565 states have internal predecessors, (3016), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 3051 transitions. [2021-11-09 08:36:48,779 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 3051 transitions. Word has length 17 [2021-11-09 08:36:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:48,779 INFO L470 AbstractCegarLoop]: Abstraction has 2584 states and 3051 transitions. [2021-11-09 08:36:48,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 3051 transitions. [2021-11-09 08:36:48,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:36:48,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:48,782 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:48,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:48,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:48,994 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr334REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:48,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2032047504, now seen corresponding path program 1 times [2021-11-09 08:36:48,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:48,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336939768] [2021-11-09 08:36:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:48,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:48,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:48,996 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:48,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 08:36:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:49,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:36:49,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:49,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:49,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:49,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336939768] [2021-11-09 08:36:49,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336939768] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:49,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:49,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 08:36:49,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172070321] [2021-11-09 08:36:49,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:49,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:49,365 INFO L87 Difference]: Start difference. First operand 2584 states and 3051 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:49,453 INFO L93 Difference]: Finished difference Result 4195 states and 4766 transitions. [2021-11-09 08:36:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:49,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-09 08:36:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:49,475 INFO L225 Difference]: With dead ends: 4195 [2021-11-09 08:36:49,475 INFO L226 Difference]: Without dead ends: 4195 [2021-11-09 08:36:49,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-11-09 08:36:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 2506. [2021-11-09 08:36:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 1497 states have (on average 1.9285237140948563) internal successors, (2887), 2487 states have internal predecessors, (2887), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 2922 transitions. [2021-11-09 08:36:49,542 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 2922 transitions. Word has length 24 [2021-11-09 08:36:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:49,543 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 2922 transitions. [2021-11-09 08:36:49,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 2922 transitions. [2021-11-09 08:36:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:36:49,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:49,544 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:49,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:49,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:49,758 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr16REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2117616112, now seen corresponding path program 1 times [2021-11-09 08:36:49,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:49,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258715672] [2021-11-09 08:36:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:49,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:49,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:49,764 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:49,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 08:36:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:50,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:36:50,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:50,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:50,224 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:50,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258715672] [2021-11-09 08:36:50,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258715672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:50,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:50,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 08:36:50,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054894217] [2021-11-09 08:36:50,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:50,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:50,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:50,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:50,227 INFO L87 Difference]: Start difference. First operand 2506 states and 2922 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:50,289 INFO L93 Difference]: Finished difference Result 4118 states and 4689 transitions. [2021-11-09 08:36:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:36:50,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-09 08:36:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:50,315 INFO L225 Difference]: With dead ends: 4118 [2021-11-09 08:36:50,316 INFO L226 Difference]: Without dead ends: 4118 [2021-11-09 08:36:50,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2021-11-09 08:36:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2464. [2021-11-09 08:36:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 1479 states have (on average 1.922920892494929) internal successors, (2844), 2445 states have internal predecessors, (2844), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 2879 transitions. [2021-11-09 08:36:50,373 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 2879 transitions. Word has length 24 [2021-11-09 08:36:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:50,375 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 2879 transitions. [2021-11-09 08:36:50,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 2879 transitions. [2021-11-09 08:36:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:36:50,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:50,380 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:50,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:50,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:50,598 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr358REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:50,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:50,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1412495274, now seen corresponding path program 1 times [2021-11-09 08:36:50,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:50,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060246925] [2021-11-09 08:36:50,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:50,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:50,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:50,601 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:50,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 08:36:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:36:50,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:50,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:51,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:51,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060246925] [2021-11-09 08:36:51,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060246925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:51,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:51,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 08:36:51,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092582891] [2021-11-09 08:36:51,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:36:51,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:36:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:36:51,069 INFO L87 Difference]: Start difference. First operand 2464 states and 2879 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:51,205 INFO L93 Difference]: Finished difference Result 4076 states and 4596 transitions. [2021-11-09 08:36:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-09 08:36:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:51,219 INFO L225 Difference]: With dead ends: 4076 [2021-11-09 08:36:51,219 INFO L226 Difference]: Without dead ends: 4076 [2021-11-09 08:36:51,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:36:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-11-09 08:36:51,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2426. [2021-11-09 08:36:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 1455 states have (on average 1.8948453608247422) internal successors, (2757), 2407 states have internal predecessors, (2757), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 2792 transitions. [2021-11-09 08:36:51,279 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 2792 transitions. Word has length 26 [2021-11-09 08:36:51,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:51,280 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 2792 transitions. [2021-11-09 08:36:51,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 2792 transitions. [2021-11-09 08:36:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:36:51,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:51,282 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:51,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:51,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:51,495 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr40REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash -785415766, now seen corresponding path program 1 times [2021-11-09 08:36:51,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:51,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768421492] [2021-11-09 08:36:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:51,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:51,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:51,498 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:51,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-09 08:36:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:51,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:36:51,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:51,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:51,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:51,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768421492] [2021-11-09 08:36:51,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768421492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:51,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:51,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 08:36:51,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896053524] [2021-11-09 08:36:51,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:36:51,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:36:51,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:36:51,991 INFO L87 Difference]: Start difference. First operand 2426 states and 2792 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:52,129 INFO L93 Difference]: Finished difference Result 4037 states and 4545 transitions. [2021-11-09 08:36:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:52,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-09 08:36:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:52,146 INFO L225 Difference]: With dead ends: 4037 [2021-11-09 08:36:52,147 INFO L226 Difference]: Without dead ends: 4037 [2021-11-09 08:36:52,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:36:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-11-09 08:36:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 2404. [2021-11-09 08:36:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 1447 states have (on average 1.8852798894263993) internal successors, (2728), 2385 states have internal predecessors, (2728), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 2763 transitions. [2021-11-09 08:36:52,230 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 2763 transitions. Word has length 26 [2021-11-09 08:36:52,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:52,231 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 2763 transitions. [2021-11-09 08:36:52,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 2763 transitions. [2021-11-09 08:36:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:36:52,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:52,234 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:52,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:52,435 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr696REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:52,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash -253561191, now seen corresponding path program 1 times [2021-11-09 08:36:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:52,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952400407] [2021-11-09 08:36:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:52,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:52,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:52,438 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:52,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-09 08:36:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:52,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:36:52,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:52,755 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 [2021-11-09 08:36:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:52,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:53,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:53,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952400407] [2021-11-09 08:36:53,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952400407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:53,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:53,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 08:36:53,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471138015] [2021-11-09 08:36:53,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:36:53,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:53,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:36:53,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:36:53,019 INFO L87 Difference]: Start difference. First operand 2404 states and 2763 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:57,722 INFO L93 Difference]: Finished difference Result 3025 states and 3303 transitions. [2021-11-09 08:36:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:36:57,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-09 08:36:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:57,731 INFO L225 Difference]: With dead ends: 3025 [2021-11-09 08:36:57,731 INFO L226 Difference]: Without dead ends: 3025 [2021-11-09 08:36:57,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:36:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-11-09 08:36:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2400. [2021-11-09 08:36:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 1447 states have (on average 1.8825155494125778) internal successors, (2724), 2381 states have internal predecessors, (2724), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:36:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 2759 transitions. [2021-11-09 08:36:57,779 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 2759 transitions. Word has length 31 [2021-11-09 08:36:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:57,779 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 2759 transitions. [2021-11-09 08:36:57,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:36:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 2759 transitions. [2021-11-09 08:36:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:36:57,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:57,782 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:57,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:57,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:36:57,996 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr697REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:36:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash -253561190, now seen corresponding path program 1 times [2021-11-09 08:36:57,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:36:57,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177969275] [2021-11-09 08:36:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:57,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:36:57,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:36:57,998 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:36:58,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-09 08:36:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:58,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:36:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:58,424 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 [2021-11-09 08:36:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:58,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:59,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:36:59,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177969275] [2021-11-09 08:36:59,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177969275] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:36:59,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:36:59,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 08:36:59,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907245545] [2021-11-09 08:36:59,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:36:59,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:36:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:36:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:36:59,134 INFO L87 Difference]: Start difference. First operand 2400 states and 2759 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:37:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:16,084 INFO L93 Difference]: Finished difference Result 3575 states and 3928 transitions. [2021-11-09 08:37:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:37:16,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-09 08:37:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:16,093 INFO L225 Difference]: With dead ends: 3575 [2021-11-09 08:37:16,093 INFO L226 Difference]: Without dead ends: 3575 [2021-11-09 08:37:16,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:37:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-11-09 08:37:16,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2433. [2021-11-09 08:37:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 1481 states have (on average 1.8642808912896691) internal successors, (2761), 2414 states have internal predecessors, (2761), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:37:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 2796 transitions. [2021-11-09 08:37:16,136 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 2796 transitions. Word has length 31 [2021-11-09 08:37:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:16,136 INFO L470 AbstractCegarLoop]: Abstraction has 2433 states and 2796 transitions. [2021-11-09 08:37:16,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:37:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 2796 transitions. [2021-11-09 08:37:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:37:16,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:16,138 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:16,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:16,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:37:16,351 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr372REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:37:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:16,351 INFO L85 PathProgramCache]: Analyzing trace with hash 926454328, now seen corresponding path program 1 times [2021-11-09 08:37:16,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:37:16,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023218972] [2021-11-09 08:37:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:16,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:37:16,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:37:16,356 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:37:16,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-09 08:37:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:16,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:37:16,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:16,793 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 [2021-11-09 08:37:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:16,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:37:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:17,064 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:37:17,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023218972] [2021-11-09 08:37:17,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023218972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:17,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:17,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 08:37:17,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210321542] [2021-11-09 08:37:17,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:17,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:37:17,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:17,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:17,066 INFO L87 Difference]: Start difference. First operand 2433 states and 2796 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:37:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:24,503 INFO L93 Difference]: Finished difference Result 5058 states and 5640 transitions. [2021-11-09 08:37:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:37:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-09 08:37:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:24,516 INFO L225 Difference]: With dead ends: 5058 [2021-11-09 08:37:24,516 INFO L226 Difference]: Without dead ends: 5058 [2021-11-09 08:37:24,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:37:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5058 states. [2021-11-09 08:37:24,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5058 to 2430. [2021-11-09 08:37:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 1481 states have (on average 1.8568534773801486) internal successors, (2750), 2411 states have internal predecessors, (2750), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:37:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 2785 transitions. [2021-11-09 08:37:24,568 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 2785 transitions. Word has length 40 [2021-11-09 08:37:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:24,568 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 2785 transitions. [2021-11-09 08:37:24,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:37:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 2785 transitions. [2021-11-09 08:37:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:37:24,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:24,570 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:24,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:24,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:37:24,784 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr373REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:37:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash 926454329, now seen corresponding path program 1 times [2021-11-09 08:37:24,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:37:24,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898676031] [2021-11-09 08:37:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:24,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:37:24,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:37:24,785 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:37:24,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-09 08:37:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:25,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:37:25,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:25,192 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 [2021-11-09 08:37:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:25,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:37:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:26,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:37:26,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898676031] [2021-11-09 08:37:26,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898676031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:26,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:26,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 08:37:26,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851487313] [2021-11-09 08:37:26,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:37:26,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:37:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:37:26,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:37:26,035 INFO L87 Difference]: Start difference. First operand 2430 states and 2785 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:37:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:45,441 INFO L93 Difference]: Finished difference Result 5190 states and 5720 transitions. [2021-11-09 08:37:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:37:45,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-09 08:37:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:45,452 INFO L225 Difference]: With dead ends: 5190 [2021-11-09 08:37:45,452 INFO L226 Difference]: Without dead ends: 5190 [2021-11-09 08:37:45,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:37:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-11-09 08:37:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 2430. [2021-11-09 08:37:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 1481 states have (on average 1.8541525995948682) internal successors, (2746), 2411 states have internal predecessors, (2746), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:37:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 2781 transitions. [2021-11-09 08:37:45,505 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 2781 transitions. Word has length 40 [2021-11-09 08:37:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:45,505 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 2781 transitions. [2021-11-09 08:37:45,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:37:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 2781 transitions. [2021-11-09 08:37:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:37:45,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:45,507 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:45,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:45,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:37:45,721 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr54REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:37:45,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:45,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1060930120, now seen corresponding path program 1 times [2021-11-09 08:37:45,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:37:45,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542506336] [2021-11-09 08:37:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:45,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:37:45,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:37:45,723 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:37:45,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-09 08:37:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:46,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:37:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:46,170 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 [2021-11-09 08:37:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:46,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:37:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:46,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:37:46,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542506336] [2021-11-09 08:37:46,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542506336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:46,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:46,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 08:37:46,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42514356] [2021-11-09 08:37:46,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:37:46,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:37:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:37:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:37:46,445 INFO L87 Difference]: Start difference. First operand 2430 states and 2781 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:37:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:53,098 INFO L93 Difference]: Finished difference Result 4671 states and 5229 transitions. [2021-11-09 08:37:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:37:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-09 08:37:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:53,107 INFO L225 Difference]: With dead ends: 4671 [2021-11-09 08:37:53,108 INFO L226 Difference]: Without dead ends: 4671 [2021-11-09 08:37:53,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:37:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2021-11-09 08:37:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 2426. [2021-11-09 08:37:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 1481 states have (on average 1.851451721809588) internal successors, (2742), 2407 states have internal predecessors, (2742), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:37:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 2777 transitions. [2021-11-09 08:37:53,154 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 2777 transitions. Word has length 40 [2021-11-09 08:37:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:53,154 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 2777 transitions. [2021-11-09 08:37:53,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:37:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 2777 transitions. [2021-11-09 08:37:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:37:53,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:53,156 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:53,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:53,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:37:53,369 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr55REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:37:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:53,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1060930119, now seen corresponding path program 1 times [2021-11-09 08:37:53,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:37:53,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946032290] [2021-11-09 08:37:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:53,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:37:53,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:37:53,372 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:37:53,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-09 08:37:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:53,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:37:53,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:53,858 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 [2021-11-09 08:37:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:54,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:37:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:54,606 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:37:54,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946032290] [2021-11-09 08:37:54,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946032290] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:37:54,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:37:54,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 08:37:54,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962855336] [2021-11-09 08:37:54,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:37:54,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:37:54,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:37:54,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:37:54,608 INFO L87 Difference]: Start difference. First operand 2426 states and 2777 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:14,869 INFO L93 Difference]: Finished difference Result 4579 states and 5017 transitions. [2021-11-09 08:38:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:38:14,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-09 08:38:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:14,878 INFO L225 Difference]: With dead ends: 4579 [2021-11-09 08:38:14,879 INFO L226 Difference]: Without dead ends: 4579 [2021-11-09 08:38:14,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:38:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2021-11-09 08:38:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 2422. [2021-11-09 08:38:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 1481 states have (on average 1.848750844024308) internal successors, (2738), 2403 states have internal predecessors, (2738), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:38:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2773 transitions. [2021-11-09 08:38:14,927 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2773 transitions. Word has length 40 [2021-11-09 08:38:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:14,927 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 2773 transitions. [2021-11-09 08:38:14,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2773 transitions. [2021-11-09 08:38:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:38:14,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:14,929 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:14,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-09 08:38:15,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:38:15,144 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr704REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:38:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1617899872, now seen corresponding path program 1 times [2021-11-09 08:38:15,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:38:15,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416930916] [2021-11-09 08:38:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:15,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:38:15,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:38:15,147 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:38:15,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-09 08:38:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:15,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:38:15,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:15,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:38:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:16,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:38:16,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416930916] [2021-11-09 08:38:16,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416930916] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:16,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:16,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 08:38:16,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863627480] [2021-11-09 08:38:16,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:16,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:38:16,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:16,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:16,046 INFO L87 Difference]: Start difference. First operand 2422 states and 2773 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:16,140 INFO L93 Difference]: Finished difference Result 2416 states and 2759 transitions. [2021-11-09 08:38:16,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-09 08:38:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:16,148 INFO L225 Difference]: With dead ends: 2416 [2021-11-09 08:38:16,148 INFO L226 Difference]: Without dead ends: 2416 [2021-11-09 08:38:16,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:38:16,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-11-09 08:38:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2021-11-09 08:38:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1475 states have (on average 1.8467796610169491) internal successors, (2724), 2397 states have internal predecessors, (2724), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 08:38:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 2759 transitions. [2021-11-09 08:38:16,183 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 2759 transitions. Word has length 44 [2021-11-09 08:38:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:16,184 INFO L470 AbstractCegarLoop]: Abstraction has 2416 states and 2759 transitions. [2021-11-09 08:38:16,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 2759 transitions. [2021-11-09 08:38:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:38:16,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:16,185 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:16,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:16,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:38:16,399 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr704REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:38:16,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:16,399 INFO L85 PathProgramCache]: Analyzing trace with hash -357192108, now seen corresponding path program 1 times [2021-11-09 08:38:16,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:38:16,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652763278] [2021-11-09 08:38:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:16,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:38:16,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:38:16,401 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:38:16,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-09 08:38:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:16,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:38:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:17,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:38:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:17,729 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:38:17,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652763278] [2021-11-09 08:38:17,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652763278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:17,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:17,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 08:38:17,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510471703] [2021-11-09 08:38:17,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:38:17,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:38:17,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:38:17,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:38:17,731 INFO L87 Difference]: Start difference. First operand 2416 states and 2759 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:18,079 INFO L93 Difference]: Finished difference Result 3934 states and 4411 transitions. [2021-11-09 08:38:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:38:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-11-09 08:38:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:18,084 INFO L225 Difference]: With dead ends: 3934 [2021-11-09 08:38:18,084 INFO L226 Difference]: Without dead ends: 3934 [2021-11-09 08:38:18,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:38:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-11-09 08:38:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3135. [2021-11-09 08:38:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 2190 states have (on average 1.8136986301369864) internal successors, (3972), 3109 states have internal predecessors, (3972), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 08:38:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 4021 transitions. [2021-11-09 08:38:18,133 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 4021 transitions. Word has length 52 [2021-11-09 08:38:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:18,134 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 4021 transitions. [2021-11-09 08:38:18,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 4021 transitions. [2021-11-09 08:38:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:38:18,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:18,135 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:18,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:18,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:38:18,349 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr437REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:38:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:18,349 INFO L85 PathProgramCache]: Analyzing trace with hash -964579511, now seen corresponding path program 1 times [2021-11-09 08:38:18,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:38:18,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456840554] [2021-11-09 08:38:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:18,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:38:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:38:18,351 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:38:18,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-09 08:38:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:18,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:38:18,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:19,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:38:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:19,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:38:19,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456840554] [2021-11-09 08:38:19,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456840554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:19,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:19,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 08:38:19,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305963233] [2021-11-09 08:38:19,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:19,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:38:19,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:19,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:19,171 INFO L87 Difference]: Start difference. First operand 3135 states and 4021 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:19,235 INFO L93 Difference]: Finished difference Result 4463 states and 5423 transitions. [2021-11-09 08:38:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:19,236 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-11-09 08:38:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:19,240 INFO L225 Difference]: With dead ends: 4463 [2021-11-09 08:38:19,240 INFO L226 Difference]: Without dead ends: 4463 [2021-11-09 08:38:19,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:38:19,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2021-11-09 08:38:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 3111. [2021-11-09 08:38:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2166 states have (on average 1.8153277931671283) internal successors, (3932), 3085 states have internal predecessors, (3932), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 08:38:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 3981 transitions. [2021-11-09 08:38:19,315 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 3981 transitions. Word has length 55 [2021-11-09 08:38:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:19,316 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 3981 transitions. [2021-11-09 08:38:19,316 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 3981 transitions. [2021-11-09 08:38:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:38:19,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:19,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:19,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:19,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:38:19,535 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr73REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:38:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -158828041, now seen corresponding path program 1 times [2021-11-09 08:38:19,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:38:19,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264134899] [2021-11-09 08:38:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:19,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:38:19,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:38:19,537 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:38:19,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-09 08:38:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:20,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:38:20,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:20,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:38:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:20,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:38:20,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264134899] [2021-11-09 08:38:20,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264134899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:20,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:20,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 08:38:20,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120229635] [2021-11-09 08:38:20,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:38:20,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:38:20,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:38:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:38:20,358 INFO L87 Difference]: Start difference. First operand 3111 states and 3981 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:20,418 INFO L93 Difference]: Finished difference Result 4208 states and 4921 transitions. [2021-11-09 08:38:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:38:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-11-09 08:38:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:20,422 INFO L225 Difference]: With dead ends: 4208 [2021-11-09 08:38:20,423 INFO L226 Difference]: Without dead ends: 4208 [2021-11-09 08:38:20,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:38:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-11-09 08:38:20,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3099. [2021-11-09 08:38:20,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2154 states have (on average 1.8161559888579386) internal successors, (3912), 3073 states have internal predecessors, (3912), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 08:38:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 3961 transitions. [2021-11-09 08:38:20,491 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 3961 transitions. Word has length 58 [2021-11-09 08:38:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:20,492 INFO L470 AbstractCegarLoop]: Abstraction has 3099 states and 3961 transitions. [2021-11-09 08:38:20,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 3961 transitions. [2021-11-09 08:38:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:38:20,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:20,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:20,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:20,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:38:20,708 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:38:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash 468734877, now seen corresponding path program 1 times [2021-11-09 08:38:20,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:38:20,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869831079] [2021-11-09 08:38:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:20,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:38:20,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:38:20,710 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:38:20,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-09 08:38:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:21,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:38:21,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:21,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:38:21,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:38:21,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:38:21,391 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-09 08:38:21,391 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 [2021-11-09 08:38:21,445 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-09 08:38:21,445 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 [2021-11-09 08:38:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:21,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:38:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:21,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:38:21,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869831079] [2021-11-09 08:38:21,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869831079] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:21,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:21,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-09 08:38:21,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733996398] [2021-11-09 08:38:21,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:38:21,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:38:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:38:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:38:21,726 INFO L87 Difference]: Start difference. First operand 3099 states and 3961 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:25,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:25,319 INFO L93 Difference]: Finished difference Result 3327 states and 4200 transitions. [2021-11-09 08:38:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:38:25,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-11-09 08:38:25,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:25,324 INFO L225 Difference]: With dead ends: 3327 [2021-11-09 08:38:25,324 INFO L226 Difference]: Without dead ends: 3327 [2021-11-09 08:38:25,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:38:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-11-09 08:38:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 3065. [2021-11-09 08:38:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 2120 states have (on average 1.8287735849056603) internal successors, (3877), 3039 states have internal predecessors, (3877), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 08:38:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 3926 transitions. [2021-11-09 08:38:25,357 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 3926 transitions. Word has length 61 [2021-11-09 08:38:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:25,357 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 3926 transitions. [2021-11-09 08:38:25,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 3926 transitions. [2021-11-09 08:38:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:38:25,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:25,359 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:25,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-09 08:38:25,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:38:25,593 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr437REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:38:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash 73014525, now seen corresponding path program 1 times [2021-11-09 08:38:25,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:38:25,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420827850] [2021-11-09 08:38:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:25,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:38:25,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:38:25,595 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:38:25,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-09 08:38:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:26,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:38:26,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:26,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:38:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:27,274 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:38:27,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420827850] [2021-11-09 08:38:27,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420827850] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:27,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:27,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 08:38:27,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005370520] [2021-11-09 08:38:27,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:38:27,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:38:27,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:38:27,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:38:27,275 INFO L87 Difference]: Start difference. First operand 3065 states and 3926 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:27,426 INFO L93 Difference]: Finished difference Result 4507 states and 5561 transitions. [2021-11-09 08:38:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:38:27,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-11-09 08:38:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:27,433 INFO L225 Difference]: With dead ends: 4507 [2021-11-09 08:38:27,433 INFO L226 Difference]: Without dead ends: 4507 [2021-11-09 08:38:27,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:38:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-11-09 08:38:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3788. [2021-11-09 08:38:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 2839 states have (on average 1.792180345191969) internal successors, (5088), 3755 states have internal predecessors, (5088), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-09 08:38:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 5151 transitions. [2021-11-09 08:38:27,501 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 5151 transitions. Word has length 63 [2021-11-09 08:38:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:27,502 INFO L470 AbstractCegarLoop]: Abstraction has 3788 states and 5151 transitions. [2021-11-09 08:38:27,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:38:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 5151 transitions. [2021-11-09 08:38:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:38:27,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:27,509 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:27,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:27,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:38:27,724 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr391REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:38:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1815743939, now seen corresponding path program 1 times [2021-11-09 08:38:27,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:38:27,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055906091] [2021-11-09 08:38:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:27,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:38:27,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:38:27,727 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:38:27,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-09 08:38:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:28,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:38:28,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:28,790 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 [2021-11-09 08:38:28,795 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 [2021-11-09 08:38:29,617 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:38:29,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2021-11-09 08:38:29,622 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:38:29,623 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 24 treesize of output 20 [2021-11-09 08:38:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:29,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:38:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:34,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:38:34,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055906091] [2021-11-09 08:38:34,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055906091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:38:34,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:38:34,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 08:38:34,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055366296] [2021-11-09 08:38:34,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:38:34,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:38:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:38:34,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-09 08:38:34,670 INFO L87 Difference]: Start difference. First operand 3788 states and 5151 transitions. Second operand has 6 states, 5 states have (on average 24.2) internal successors, (121), 6 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:39:06,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:06,644 INFO L93 Difference]: Finished difference Result 6730 states and 9145 transitions. [2021-11-09 08:39:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:39:06,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.2) internal successors, (121), 6 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-11-09 08:39:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:06,651 INFO L225 Difference]: With dead ends: 6730 [2021-11-09 08:39:06,651 INFO L226 Difference]: Without dead ends: 6730 [2021-11-09 08:39:06,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-09 08:39:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6730 states. [2021-11-09 08:39:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6730 to 3732. [2021-11-09 08:39:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 2847 states have (on average 1.7379697927643134) internal successors, (4948), 3699 states have internal predecessors, (4948), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-09 08:39:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 5011 transitions. [2021-11-09 08:39:06,717 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 5011 transitions. Word has length 66 [2021-11-09 08:39:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:06,718 INFO L470 AbstractCegarLoop]: Abstraction has 3732 states and 5011 transitions. [2021-11-09 08:39:06,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.2) internal successors, (121), 6 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:39:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 5011 transitions. [2021-11-09 08:39:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:39:06,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:06,719 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:06,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-09 08:39:06,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:39:06,949 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr396REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:39:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash -407756336, now seen corresponding path program 1 times [2021-11-09 08:39:06,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:39:06,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581160826] [2021-11-09 08:39:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:06,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:39:06,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:39:06,952 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:39:06,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-09 08:39:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:07,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:39:07,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:07,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:39:07,935 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 22 treesize of output 18 [2021-11-09 08:39:07,970 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 24 treesize of output 12 [2021-11-09 08:39:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:07,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:39:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:08,129 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:39:08,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581160826] [2021-11-09 08:39:08,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581160826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:08,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:08,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 08:39:08,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420384969] [2021-11-09 08:39:08,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:39:08,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:39:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:39:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:39:08,131 INFO L87 Difference]: Start difference. First operand 3732 states and 5011 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:39:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:14,945 INFO L93 Difference]: Finished difference Result 3731 states and 5008 transitions. [2021-11-09 08:39:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:39:14,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-11-09 08:39:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:14,950 INFO L225 Difference]: With dead ends: 3731 [2021-11-09 08:39:14,950 INFO L226 Difference]: Without dead ends: 3731 [2021-11-09 08:39:14,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:39:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-11-09 08:39:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3731. [2021-11-09 08:39:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 2847 states have (on average 1.7369160519845452) internal successors, (4945), 3698 states have internal predecessors, (4945), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-09 08:39:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5008 transitions. [2021-11-09 08:39:15,009 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5008 transitions. Word has length 71 [2021-11-09 08:39:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:15,009 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5008 transitions. [2021-11-09 08:39:15,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:39:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5008 transitions. [2021-11-09 08:39:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:39:15,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:15,011 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:15,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:15,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:39:15,216 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr397REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:39:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash -407756335, now seen corresponding path program 1 times [2021-11-09 08:39:15,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:39:15,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449471572] [2021-11-09 08:39:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:15,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:39:15,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:39:15,218 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:39:15,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-09 08:39:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:16,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:39:16,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:16,137 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 [2021-11-09 08:39:16,158 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 19 treesize of output 15 [2021-11-09 08:39:16,167 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 [2021-11-09 08:39:16,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-09 08:39:16,233 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 24 treesize of output 12 [2021-11-09 08:39:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:16,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:39:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:16,615 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:39:16,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449471572] [2021-11-09 08:39:16,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449471572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:16,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:16,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-09 08:39:16,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396682447] [2021-11-09 08:39:16,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:39:16,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:39:16,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:39:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:39:16,617 INFO L87 Difference]: Start difference. First operand 3731 states and 5008 transitions. Second operand has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:39:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:37,857 INFO L93 Difference]: Finished difference Result 3730 states and 5005 transitions. [2021-11-09 08:39:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:39:37,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-11-09 08:39:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:37,862 INFO L225 Difference]: With dead ends: 3730 [2021-11-09 08:39:37,862 INFO L226 Difference]: Without dead ends: 3730 [2021-11-09 08:39:37,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:39:37,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2021-11-09 08:39:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3730. [2021-11-09 08:39:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 2844 states have (on average 1.7376933895921238) internal successors, (4942), 3697 states have internal predecessors, (4942), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-09 08:39:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 5005 transitions. [2021-11-09 08:39:37,898 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 5005 transitions. Word has length 71 [2021-11-09 08:39:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:37,898 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 5005 transitions. [2021-11-09 08:39:37,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:39:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 5005 transitions. [2021-11-09 08:39:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:39:37,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:37,900 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:37,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:38,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:39:38,100 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr78REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:39:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:38,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1405255012, now seen corresponding path program 1 times [2021-11-09 08:39:38,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:39:38,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809328743] [2021-11-09 08:39:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:38,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:39:38,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:39:38,102 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:39:38,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-09 08:39:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:39:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:39,086 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 [2021-11-09 08:39:39,105 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 23 treesize of output 19 [2021-11-09 08:39:39,158 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 [2021-11-09 08:39:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:39,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:39:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:39,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:39:39,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809328743] [2021-11-09 08:39:39,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809328743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:39,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:39,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 08:39:39,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702098349] [2021-11-09 08:39:39,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:39:39,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:39:39,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:39:39,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:39:39,336 INFO L87 Difference]: Start difference. First operand 3730 states and 5005 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:39:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:47,057 INFO L93 Difference]: Finished difference Result 3729 states and 5003 transitions. [2021-11-09 08:39:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:39:47,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-11-09 08:39:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:47,062 INFO L225 Difference]: With dead ends: 3729 [2021-11-09 08:39:47,062 INFO L226 Difference]: Without dead ends: 3729 [2021-11-09 08:39:47,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:39:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-11-09 08:39:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3729. [2021-11-09 08:39:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 2844 states have (on average 1.7369901547116737) internal successors, (4940), 3696 states have internal predecessors, (4940), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-09 08:39:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 5003 transitions. [2021-11-09 08:39:47,109 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 5003 transitions. Word has length 71 [2021-11-09 08:39:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:47,110 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 5003 transitions. [2021-11-09 08:39:47,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:39:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 5003 transitions. [2021-11-09 08:39:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:39:47,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:47,111 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:47,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:47,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:39:47,311 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr79REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:39:47,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1405255013, now seen corresponding path program 1 times [2021-11-09 08:39:47,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:39:47,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529913109] [2021-11-09 08:39:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:47,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:39:47,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:39:47,313 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:39:47,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-09 08:39:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:48,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:39:48,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:48,336 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 [2021-11-09 08:39:48,368 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 [2021-11-09 08:39:48,380 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 19 treesize of output 15 [2021-11-09 08:39:48,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-09 08:39:48,482 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 24 treesize of output 12 [2021-11-09 08:39:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:48,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:39:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:48,866 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:39:48,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529913109] [2021-11-09 08:39:48,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529913109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:48,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:48,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-09 08:39:48,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76866743] [2021-11-09 08:39:48,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:39:48,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:39:48,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:39:48,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:39:48,867 INFO L87 Difference]: Start difference. First operand 3729 states and 5003 transitions. Second operand has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:40:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:12,692 INFO L93 Difference]: Finished difference Result 3728 states and 5001 transitions. [2021-11-09 08:40:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:40:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-11-09 08:40:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:12,697 INFO L225 Difference]: With dead ends: 3728 [2021-11-09 08:40:12,697 INFO L226 Difference]: Without dead ends: 3728 [2021-11-09 08:40:12,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:40:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-11-09 08:40:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 3728. [2021-11-09 08:40:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 2842 states have (on average 1.737508796622097) internal successors, (4938), 3695 states have internal predecessors, (4938), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-09 08:40:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 5001 transitions. [2021-11-09 08:40:12,740 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 5001 transitions. Word has length 71 [2021-11-09 08:40:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:12,740 INFO L470 AbstractCegarLoop]: Abstraction has 3728 states and 5001 transitions. [2021-11-09 08:40:12,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:40:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 5001 transitions. [2021-11-09 08:40:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 08:40:12,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:12,742 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:12,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-09 08:40:12,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:40:12,961 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:40:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash 491384311, now seen corresponding path program 1 times [2021-11-09 08:40:12,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:40:12,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398195407] [2021-11-09 08:40:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:12,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:40:12,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:40:12,964 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:40:12,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-09 08:40:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:40:13,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:14,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:40:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:14,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:40:14,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398195407] [2021-11-09 08:40:14,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398195407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:14,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:14,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-09 08:40:14,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569219761] [2021-11-09 08:40:14,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:40:14,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:40:14,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:40:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:40:14,278 INFO L87 Difference]: Start difference. First operand 3728 states and 5001 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:40:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:14,431 INFO L93 Difference]: Finished difference Result 3738 states and 5017 transitions. [2021-11-09 08:40:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:40:14,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2021-11-09 08:40:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:14,440 INFO L225 Difference]: With dead ends: 3738 [2021-11-09 08:40:14,440 INFO L226 Difference]: Without dead ends: 3738 [2021-11-09 08:40:14,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:40:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2021-11-09 08:40:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 3738. [2021-11-09 08:40:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 2850 states have (on average 1.736842105263158) internal successors, (4950), 3704 states have internal predecessors, (4950), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (35), 28 states have call predecessors, (35), 31 states have call successors, (35) [2021-11-09 08:40:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 5017 transitions. [2021-11-09 08:40:14,505 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 5017 transitions. Word has length 79 [2021-11-09 08:40:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:14,505 INFO L470 AbstractCegarLoop]: Abstraction has 3738 states and 5017 transitions. [2021-11-09 08:40:14,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:40:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 5017 transitions. [2021-11-09 08:40:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 08:40:14,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:14,507 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:14,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:14,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:40:14,724 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:40:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash -787144713, now seen corresponding path program 1 times [2021-11-09 08:40:14,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:40:14,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745384563] [2021-11-09 08:40:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:14,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:40:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:40:14,726 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:40:14,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-09 08:40:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:15,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:40:15,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:15,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:40:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:16,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:40:16,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745384563] [2021-11-09 08:40:16,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745384563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:40:16,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:16,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 08:40:16,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583617700] [2021-11-09 08:40:16,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:40:16,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:40:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:40:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:40:16,233 INFO L87 Difference]: Start difference. First operand 3738 states and 5017 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:40:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:16,793 INFO L93 Difference]: Finished difference Result 3752 states and 5041 transitions. [2021-11-09 08:40:16,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:40:16,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 81 [2021-11-09 08:40:16,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:16,805 INFO L225 Difference]: With dead ends: 3752 [2021-11-09 08:40:16,806 INFO L226 Difference]: Without dead ends: 3748 [2021-11-09 08:40:16,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:40:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-11-09 08:40:16,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3744. [2021-11-09 08:40:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 2856 states have (on average 1.7359943977591037) internal successors, (4958), 3710 states have internal predecessors, (4958), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (35), 28 states have call predecessors, (35), 31 states have call successors, (35) [2021-11-09 08:40:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 5025 transitions. [2021-11-09 08:40:16,864 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 5025 transitions. Word has length 81 [2021-11-09 08:40:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:16,865 INFO L470 AbstractCegarLoop]: Abstraction has 3744 states and 5025 transitions. [2021-11-09 08:40:16,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:40:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 5025 transitions. [2021-11-09 08:40:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 08:40:16,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:16,867 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:16,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:17,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:40:17,073 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:40:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:17,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1438516215, now seen corresponding path program 2 times [2021-11-09 08:40:17,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:40:17,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038245778] [2021-11-09 08:40:17,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:40:17,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:40:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:40:17,077 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:40:17,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57eb8255-2ada-43f5-a7f1-eb989e6c9202/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-09 08:40:18,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 08:40:18,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:18,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:40:18,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:18,454 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 [2021-11-09 08:40:18,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:40:18,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:40:18,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:40:18,547 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-09 08:40:18,548 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 [2021-11-09 08:40:18,662 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 08:40:18,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-09 08:40:18,981 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-09 08:40:18,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-09 08:40:24,582 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-09 08:40:24,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-09 08:40:34,699 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-09 08:40:34,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-09 08:40:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 08:40:34,947 INFO L328 TraceCheckSpWp]: Computing backward predicates...