./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.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_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/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_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/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_4dfa6114-3f36-4b53-8111-8a11ffced988/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 6c366d24ef9ea71cc6362f44963cc0aaadef105bf25ae7c56112d839540c58b5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:48:27,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:48:27,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:48:27,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:48:27,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:48:27,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:48:27,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:48:27,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:48:27,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:48:27,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:48:27,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:48:27,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:48:27,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:48:27,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:48:27,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:48:27,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:48:27,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:48:27,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:48:27,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:48:27,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:48:27,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:48:27,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:48:27,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:48:27,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:48:27,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:48:27,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:48:27,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:48:27,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:48:27,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:48:27,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:48:27,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:48:27,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:48:27,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:48:27,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:48:27,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:48:27,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:48:27,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:48:27,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:48:27,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:48:27,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:48:27,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:48:27,818 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 10:48:27,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:48:27,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:48:27,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:48:27,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:48:27,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:48:27,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:48:27,878 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:48:27,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:48:27,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:48:27,879 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:48:27,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:48:27,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:48:27,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:48:27,880 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 10:48:27,880 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 10:48:27,880 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 10:48:27,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:48:27,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 10:48:27,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:48:27,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:48:27,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:48:27,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:48:27,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:48:27,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:48:27,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:48:27,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:48:27,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:48:27,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:48:27,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:48:27,884 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_4dfa6114-3f36-4b53-8111-8a11ffced988/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c366d24ef9ea71cc6362f44963cc0aaadef105bf25ae7c56112d839540c58b5 [2021-11-09 10:48:28,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:48:28,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:48:28,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:48:28,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:48:28,347 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:48:28,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.i [2021-11-09 10:48:28,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/data/34b15f418/8e3ac2a54eb9486693ce22a90ca06633/FLAGe72969464 [2021-11-09 10:48:29,343 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:48:29,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.i [2021-11-09 10:48:29,362 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/data/34b15f418/8e3ac2a54eb9486693ce22a90ca06633/FLAGe72969464 [2021-11-09 10:48:29,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/data/34b15f418/8e3ac2a54eb9486693ce22a90ca06633 [2021-11-09 10:48:29,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:48:29,460 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 10:48:29,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:48:29,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:48:29,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:48:29,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:29" (1/1) ... [2021-11-09 10:48:29,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75367a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:29, skipping insertion in model container [2021-11-09 10:48:29,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:29" (1/1) ... [2021-11-09 10:48:29,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:48:29,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:48:30,201 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_4dfa6114-3f36-4b53-8111-8a11ffced988/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.i[33021,33034] [2021-11-09 10:48:30,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:48:30,438 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 10:48:30,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54f3dc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:30, skipping insertion in model container [2021-11-09 10:48:30,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:48:30,444 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-09 10:48:30,448 INFO L168 Benchmark]: Toolchain (without parser) took 985.52 ms. Allocated memory is still 92.3 MB. Free memory was 55.8 MB in the beginning and 54.9 MB in the end (delta: 922.8 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:48:30,450 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 92.3 MB. Free memory was 65.3 MB in the beginning and 65.3 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:48:30,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 982.47 ms. Allocated memory is still 92.3 MB. Free memory was 55.6 MB in the beginning and 54.9 MB in the end (delta: 701.9 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:48:30,456 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 92.3 MB. Free memory was 65.3 MB in the beginning and 65.3 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 982.47 ms. Allocated memory is still 92.3 MB. Free memory was 55.6 MB in the beginning and 54.9 MB in the end (delta: 701.9 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/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_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/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_4dfa6114-3f36-4b53-8111-8a11ffced988/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 6c366d24ef9ea71cc6362f44963cc0aaadef105bf25ae7c56112d839540c58b5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:48:33,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:48:33,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:48:33,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:48:33,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:48:33,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:48:33,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:48:33,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:48:33,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:48:33,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:48:33,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:48:33,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:48:33,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:48:33,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:48:33,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:48:33,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:48:33,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:48:33,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:48:33,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:48:33,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:48:33,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:48:33,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:48:33,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:48:33,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:48:33,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:48:33,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:48:33,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:48:33,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:48:33,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:48:33,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:48:33,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:48:33,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:48:33,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:48:33,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:48:33,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:48:33,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:48:33,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:48:33,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:48:33,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:48:33,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:48:33,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:48:33,324 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-09 10:48:33,368 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:48:33,368 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:48:33,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:48:33,369 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:48:33,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:48:33,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:48:33,371 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:48:33,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:48:33,371 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:48:33,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:48:33,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:48:33,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:48:33,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:48:33,373 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 10:48:33,373 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 10:48:33,373 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 10:48:33,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:48:33,374 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 10:48:33,374 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 10:48:33,374 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 10:48:33,374 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:48:33,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:48:33,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:48:33,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:48:33,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:48:33,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:48:33,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:48:33,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:48:33,376 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 10:48:33,377 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 10:48:33,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:48:33,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 10:48:33,377 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_4dfa6114-3f36-4b53-8111-8a11ffced988/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c366d24ef9ea71cc6362f44963cc0aaadef105bf25ae7c56112d839540c58b5 [2021-11-09 10:48:33,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:48:33,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:48:33,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:48:33,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:48:33,916 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:48:33,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.i [2021-11-09 10:48:34,029 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/data/fb39282d3/8cee0f6586de4dda8b132dd66ce29ea1/FLAGf3de0660d [2021-11-09 10:48:34,879 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:48:34,881 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.i [2021-11-09 10:48:34,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/data/fb39282d3/8cee0f6586de4dda8b132dd66ce29ea1/FLAGf3de0660d [2021-11-09 10:48:34,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/data/fb39282d3/8cee0f6586de4dda8b132dd66ce29ea1 [2021-11-09 10:48:34,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:48:34,968 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 10:48:34,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:48:34,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:48:34,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:48:34,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:34" (1/1) ... [2021-11-09 10:48:34,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a997464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:34, skipping insertion in model container [2021-11-09 10:48:34,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:34" (1/1) ... [2021-11-09 10:48:34,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:48:35,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:48:35,694 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_4dfa6114-3f36-4b53-8111-8a11ffced988/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.i[33021,33034] [2021-11-09 10:48:35,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:48:35,991 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-09 10:48:36,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:48:36,060 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_4dfa6114-3f36-4b53-8111-8a11ffced988/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.i[33021,33034] [2021-11-09 10:48:36,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:48:36,250 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:48:36,282 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_4dfa6114-3f36-4b53-8111-8a11ffced988/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-3.i[33021,33034] [2021-11-09 10:48:36,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:48:36,387 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:48:36,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:36 WrapperNode [2021-11-09 10:48:36,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:48:36,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:48:36,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:48:36,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:48:36,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:36" (1/1) ... [2021-11-09 10:48:36,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:36" (1/1) ... [2021-11-09 10:48:36,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:36" (1/1) ... [2021-11-09 10:48:36,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:36" (1/1) ... [2021-11-09 10:48:36,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:36" (1/1) ... [2021-11-09 10:48:36,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:36" (1/1) ... [2021-11-09 10:48:36,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:36" (1/1) ... [2021-11-09 10:48:36,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:48:36,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:48:36,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:48:36,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:48:36,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:36" (1/1) ... [2021-11-09 10:48:36,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:48:36,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:36,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:48:36,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:48:36,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 10:48:36,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:48:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 10:48:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 10:48:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 10:48:36,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 10:48:36,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 10:48:36,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 10:48:36,788 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 10:48:36,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-09 10:48:36,788 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-09 10:48:36,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 10:48:36,789 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-09 10:48:36,790 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-09 10:48:36,790 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-09 10:48:36,790 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-09 10:48:36,790 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-09 10:48:36,790 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-09 10:48:36,791 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-09 10:48:36,792 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-09 10:48:36,792 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-09 10:48:36,792 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-09 10:48:36,792 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-09 10:48:36,792 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-09 10:48:36,792 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-09 10:48:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-09 10:48:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-09 10:48:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-09 10:48:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-09 10:48:36,793 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-09 10:48:36,794 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-09 10:48:36,794 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-09 10:48:36,794 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-09 10:48:36,794 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-09 10:48:36,794 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-09 10:48:36,795 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-09 10:48:36,795 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-09 10:48:36,796 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-09 10:48:36,796 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-09 10:48:36,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-09 10:48:36,797 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-09 10:48:36,797 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-09 10:48:36,797 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-09 10:48:36,798 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-09 10:48:36,798 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-09 10:48:36,798 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-09 10:48:36,798 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-09 10:48:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-09 10:48:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-09 10:48:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-09 10:48:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-09 10:48:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-09 10:48:36,800 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-09 10:48:36,800 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-09 10:48:36,800 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-09 10:48:36,800 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-09 10:48:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-09 10:48:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-09 10:48:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-09 10:48:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-09 10:48:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-09 10:48:36,804 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-09 10:48:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-09 10:48:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-09 10:48:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 10:48:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 10:48:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 10:48:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 10:48:36,806 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 10:48:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 10:48:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 10:48:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 10:48:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 10:48:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 10:48:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 10:48:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 10:48:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 10:48:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 10:48:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 10:48:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 10:48:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 10:48:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 10:48:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 10:48:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 10:48:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 10:48:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 10:48:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 10:48:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 10:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 10:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 10:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 10:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 10:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 10:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 10:48:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 10:48:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 10:48:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 10:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 10:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 10:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 10:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 10:48:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 10:48:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 10:48:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 10:48:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 10:48:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 10:48:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 10:48:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 10:48:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 10:48:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 10:48:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 10:48:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 10:48:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 10:48:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 10:48:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 10:48:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 10:48:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 10:48:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 10:48:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 10:48:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 10:48:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 10:48:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 10:48:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 10:48:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 10:48:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 10:48:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 10:48:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 10:48:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 10:48:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 10:48:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 10:48:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 10:48:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 10:48:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 10:48:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 10:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 10:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 10:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 10:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 10:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 10:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 10:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 10:48:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 10:48:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 10:48:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 10:48:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 10:48:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 10:48:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 10:48:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 10:48:36,834 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 10:48:36,834 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 10:48:36,834 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 10:48:36,834 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 10:48:36,834 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 10:48:36,834 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 10:48:36,835 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 10:48:36,835 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 10:48:36,835 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 10:48:36,835 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 10:48:36,835 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 10:48:36,835 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 10:48:36,835 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 10:48:36,836 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 10:48:36,836 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 10:48:36,836 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 10:48:36,836 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 10:48:36,836 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 10:48:36,836 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 10:48:36,836 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 10:48:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 10:48:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 10:48:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 10:48:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 10:48:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 10:48:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 10:48:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 10:48:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:48:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-09 10:48:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-09 10:48:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 10:48:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 10:48:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 10:48:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-09 10:48:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 10:48:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 10:48:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-09 10:48:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:48:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 10:48:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 10:48:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 10:48:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:48:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 10:48:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-09 10:48:37,617 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-09 10:48:45,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:48:45,723 INFO L299 CfgBuilder]: Removed 77 assume(true) statements. [2021-11-09 10:48:45,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:48:45 BoogieIcfgContainer [2021-11-09 10:48:45,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:48:45,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:48:45,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:48:45,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:48:45,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:48:34" (1/3) ... [2021-11-09 10:48:45,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb07cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:48:45, skipping insertion in model container [2021-11-09 10:48:45,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:36" (2/3) ... [2021-11-09 10:48:45,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb07cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:48:45, skipping insertion in model container [2021-11-09 10:48:45,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:48:45" (3/3) ... [2021-11-09 10:48:45,748 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test4-3.i [2021-11-09 10:48:45,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:48:45,755 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 851 error locations. [2021-11-09 10:48:45,821 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:48:45,840 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 10:48:45,843 INFO L340 AbstractCegarLoop]: Starting to check reachability of 851 error locations. [2021-11-09 10:48:45,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 1659 states, 789 states have (on average 2.280101394169835) internal successors, (1799), 1644 states have internal predecessors, (1799), 19 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (19), 10 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-09 10:48:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:48:45,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:45,953 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:45,954 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:48:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:45,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1062938490, now seen corresponding path program 1 times [2021-11-09 10:48:45,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:48:45,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52192447] [2021-11-09 10:48:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:45,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:48:45,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:48:45,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:48:45,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 10:48:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:46,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 10:48:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:46,426 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 10:48:46,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:48:46,481 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 10:48:46,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:48:46,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52192447] [2021-11-09 10:48:46,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52192447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:46,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:46,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:48:46,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726315747] [2021-11-09 10:48:46,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:48:46,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:48:46,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:48:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:48:46,540 INFO L87 Difference]: Start difference. First operand has 1659 states, 789 states have (on average 2.280101394169835) internal successors, (1799), 1644 states have internal predecessors, (1799), 19 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (19), 10 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 10:48:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:46,740 INFO L93 Difference]: Finished difference Result 1641 states and 1734 transitions. [2021-11-09 10:48:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:48:46,741 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 9 [2021-11-09 10:48:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:46,800 INFO L225 Difference]: With dead ends: 1641 [2021-11-09 10:48:46,802 INFO L226 Difference]: Without dead ends: 1638 [2021-11-09 10:48:46,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:48:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-11-09 10:48:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1638. [2021-11-09 10:48:46,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 780 states have (on average 2.1717948717948716) internal successors, (1694), 1624 states have internal predecessors, (1694), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-09 10:48:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 1731 transitions. [2021-11-09 10:48:46,972 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 1731 transitions. Word has length 9 [2021-11-09 10:48:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:46,973 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 1731 transitions. [2021-11-09 10:48:46,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 10:48:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 1731 transitions. [2021-11-09 10:48:46,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:48:46,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:46,977 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:46,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:47,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:48:47,193 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:48:47,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:47,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1062938552, now seen corresponding path program 1 times [2021-11-09 10:48:47,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:48:47,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659025511] [2021-11-09 10:48:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:47,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:48:47,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:48:47,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:48:47,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 10:48:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:47,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:48:47,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:47,562 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 10:48:47,586 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 10:48:47,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:48:47,622 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 10:48:47,623 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:48:47,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659025511] [2021-11-09 10:48:47,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659025511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:47,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:47,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:48:47,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278636864] [2021-11-09 10:48:47,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:48:47,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:48:47,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:48:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:47,627 INFO L87 Difference]: Start difference. First operand 1638 states and 1731 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 10:48:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:51,552 INFO L93 Difference]: Finished difference Result 1675 states and 1781 transitions. [2021-11-09 10:48:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:48:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 9 [2021-11-09 10:48:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:51,566 INFO L225 Difference]: With dead ends: 1675 [2021-11-09 10:48:51,566 INFO L226 Difference]: Without dead ends: 1675 [2021-11-09 10:48:51,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:48:51,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-11-09 10:48:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1621. [2021-11-09 10:48:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 856 states have (on average 2.02803738317757) internal successors, (1736), 1607 states have internal predecessors, (1736), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-09 10:48:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 1773 transitions. [2021-11-09 10:48:51,662 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 1773 transitions. Word has length 9 [2021-11-09 10:48:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:51,663 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 1773 transitions. [2021-11-09 10:48:51,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 10:48:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 1773 transitions. [2021-11-09 10:48:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:48:51,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:51,664 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:51,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:51,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:48:51,885 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:48:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:51,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1062938553, now seen corresponding path program 1 times [2021-11-09 10:48:51,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:48:51,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529637409] [2021-11-09 10:48:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:51,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:48:51,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:48:51,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:48:51,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 10:48:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:52,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:48:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:52,174 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 10:48:52,217 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 10:48:52,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:48:52,326 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 10:48:52,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:48:52,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529637409] [2021-11-09 10:48:52,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529637409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:52,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:52,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 10:48:52,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344112431] [2021-11-09 10:48:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:52,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:48:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:52,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:52,342 INFO L87 Difference]: Start difference. First operand 1621 states and 1773 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 10:49:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:01,603 INFO L93 Difference]: Finished difference Result 1975 states and 2148 transitions. [2021-11-09 10:49:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:49:01,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-11-09 10:49:01,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:01,616 INFO L225 Difference]: With dead ends: 1975 [2021-11-09 10:49:01,617 INFO L226 Difference]: Without dead ends: 1975 [2021-11-09 10:49:01,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 10:49:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-11-09 10:49:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1777. [2021-11-09 10:49:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1022 states have (on average 1.9980430528375734) internal successors, (2042), 1763 states have internal predecessors, (2042), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-09 10:49:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2079 transitions. [2021-11-09 10:49:01,680 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2079 transitions. Word has length 9 [2021-11-09 10:49:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:01,681 INFO L470 AbstractCegarLoop]: Abstraction has 1777 states and 2079 transitions. [2021-11-09 10:49:01,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 10:49:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2079 transitions. [2021-11-09 10:49:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:49:01,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:01,682 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:01,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:01,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:49:01,897 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr640REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:49:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:01,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1406955853, now seen corresponding path program 1 times [2021-11-09 10:49:01,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:49:01,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613110181] [2021-11-09 10:49:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:01,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:49:01,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:49:01,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:49:01,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 10:49:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:02,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:49:02,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:02,162 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 10:49:02,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:49:02,220 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 10:49:02,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:49:02,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613110181] [2021-11-09 10:49:02,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613110181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:02,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:02,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 10:49:02,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537153106] [2021-11-09 10:49:02,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:49:02,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:49:02,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:49:02,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:49:02,226 INFO L87 Difference]: Start difference. First operand 1777 states and 2079 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 10:49:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:02,407 INFO L93 Difference]: Finished difference Result 3122 states and 3687 transitions. [2021-11-09 10:49:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:49:02,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 10 [2021-11-09 10:49:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:02,429 INFO L225 Difference]: With dead ends: 3122 [2021-11-09 10:49:02,429 INFO L226 Difference]: Without dead ends: 3122 [2021-11-09 10:49:02,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 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 10:49:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-11-09 10:49:02,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 2593. [2021-11-09 10:49:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 1838 states have (on average 1.9793253536452666) internal successors, (3638), 2573 states have internal predecessors, (3638), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 10:49:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 3687 transitions. [2021-11-09 10:49:02,533 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 3687 transitions. Word has length 10 [2021-11-09 10:49:02,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:02,534 INFO L470 AbstractCegarLoop]: Abstraction has 2593 states and 3687 transitions. [2021-11-09 10:49:02,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 10:49:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 3687 transitions. [2021-11-09 10:49:02,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:49:02,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:02,536 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:02,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-09 10:49:02,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:49:02,749 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr4REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:49:02,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:02,750 INFO L85 PathProgramCache]: Analyzing trace with hash -429534590, now seen corresponding path program 1 times [2021-11-09 10:49:02,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:49:02,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748869586] [2021-11-09 10:49:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:02,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:49:02,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:49:02,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:49:02,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 10:49:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:03,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:49:03,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:03,102 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 10:49:03,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:49:03,166 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 10:49:03,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:49:03,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748869586] [2021-11-09 10:49:03,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748869586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:03,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:03,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 10:49:03,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335268406] [2021-11-09 10:49:03,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:49:03,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:49:03,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:49:03,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:49:03,170 INFO L87 Difference]: Start difference. First operand 2593 states and 3687 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 10:49:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:03,248 INFO L93 Difference]: Finished difference Result 2533 states and 3601 transitions. [2021-11-09 10:49:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:49:03,249 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 10:49:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:03,270 INFO L225 Difference]: With dead ends: 2533 [2021-11-09 10:49:03,271 INFO L226 Difference]: Without dead ends: 2533 [2021-11-09 10:49:03,271 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 10:49:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-11-09 10:49:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2533. [2021-11-09 10:49:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2533 states, 1802 states have (on average 1.9711431742508325) internal successors, (3552), 2513 states have internal predecessors, (3552), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 10:49:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 3601 transitions. [2021-11-09 10:49:03,360 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 3601 transitions. Word has length 15 [2021-11-09 10:49:03,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:03,361 INFO L470 AbstractCegarLoop]: Abstraction has 2533 states and 3601 transitions. [2021-11-09 10:49:03,361 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 10:49:03,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 3601 transitions. [2021-11-09 10:49:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 10:49:03,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:03,363 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 10:49:03,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:03,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:49:03,579 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr28REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:49:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash -465881252, now seen corresponding path program 1 times [2021-11-09 10:49:03,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:49:03,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841279031] [2021-11-09 10:49:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:03,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:49:03,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:49:03,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:49:03,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 10:49:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:03,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:49:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:03,911 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 10:49:03,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:49:03,979 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 10:49:03,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:49:03,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841279031] [2021-11-09 10:49:03,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841279031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:03,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:03,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 10:49:03,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679848287] [2021-11-09 10:49:03,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:49:03,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:49:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:49:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:49:03,983 INFO L87 Difference]: Start difference. First operand 2533 states and 3601 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 10:49:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:04,107 INFO L93 Difference]: Finished difference Result 2505 states and 3545 transitions. [2021-11-09 10:49:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:49:04,108 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 10:49:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:04,126 INFO L225 Difference]: With dead ends: 2505 [2021-11-09 10:49:04,126 INFO L226 Difference]: Without dead ends: 2505 [2021-11-09 10:49:04,126 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 10:49:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-11-09 10:49:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2503. [2021-11-09 10:49:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 1786 states have (on average 1.9563269876819709) internal successors, (3494), 2483 states have internal predecessors, (3494), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 10:49:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3543 transitions. [2021-11-09 10:49:04,209 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3543 transitions. Word has length 17 [2021-11-09 10:49:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:04,209 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 3543 transitions. [2021-11-09 10:49:04,210 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 10:49:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3543 transitions. [2021-11-09 10:49:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:49:04,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:04,212 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 10:49:04,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-09 10:49:04,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:49:04,425 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr42REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:49:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1175213898, now seen corresponding path program 1 times [2021-11-09 10:49:04,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:49:04,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87884123] [2021-11-09 10:49:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:04,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:49:04,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:49:04,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:49:04,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 10:49:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:04,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:49:04,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:04,776 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 10:49:04,906 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 10:49:04,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:49:05,048 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 10:49:05,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:49:05,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87884123] [2021-11-09 10:49:05,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87884123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:05,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:05,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 10:49:05,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856792146] [2021-11-09 10:49:05,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:49:05,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:49:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:49:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:49:05,050 INFO L87 Difference]: Start difference. First operand 2503 states and 3543 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 10:49:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:10,385 INFO L93 Difference]: Finished difference Result 3483 states and 4706 transitions. [2021-11-09 10:49:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:49:10,386 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 10:49:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:10,435 INFO L225 Difference]: With dead ends: 3483 [2021-11-09 10:49:10,435 INFO L226 Difference]: Without dead ends: 3483 [2021-11-09 10:49:10,436 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 10:49:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2021-11-09 10:49:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 2499. [2021-11-09 10:49:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 1786 states have (on average 1.9518477043673013) internal successors, (3486), 2479 states have internal predecessors, (3486), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 10:49:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 3535 transitions. [2021-11-09 10:49:10,529 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 3535 transitions. Word has length 31 [2021-11-09 10:49:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:10,530 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 3535 transitions. [2021-11-09 10:49:10,530 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 10:49:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 3535 transitions. [2021-11-09 10:49:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:49:10,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:10,532 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 10:49:10,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:10,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:49:10,747 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr43REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:49:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1175213899, now seen corresponding path program 1 times [2021-11-09 10:49:10,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:49:10,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120086007] [2021-11-09 10:49:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:10,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:49:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:49:10,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:49:10,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 10:49:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:11,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:49:11,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:11,065 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 10:49:11,373 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 10:49:11,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:49:11,949 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 10:49:11,950 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:49:11,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120086007] [2021-11-09 10:49:11,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120086007] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:11,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:11,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 10:49:11,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823401059] [2021-11-09 10:49:11,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:49:11,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:49:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:49:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:49:11,959 INFO L87 Difference]: Start difference. First operand 2499 states and 3535 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 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 10:49:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:27,426 INFO L93 Difference]: Finished difference Result 3129 states and 4080 transitions. [2021-11-09 10:49:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:49:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 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 10:49:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:27,447 INFO L225 Difference]: With dead ends: 3129 [2021-11-09 10:49:27,448 INFO L226 Difference]: Without dead ends: 3129 [2021-11-09 10:49:27,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:49:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-11-09 10:49:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 2495. [2021-11-09 10:49:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1786 states have (on average 1.9473684210526316) internal successors, (3478), 2475 states have internal predecessors, (3478), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 10:49:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3527 transitions. [2021-11-09 10:49:27,525 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3527 transitions. Word has length 31 [2021-11-09 10:49:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:27,526 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 3527 transitions. [2021-11-09 10:49:27,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 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 10:49:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3527 transitions. [2021-11-09 10:49:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:49:27,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:27,529 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] [2021-11-09 10:49:27,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:27,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:49:27,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr107REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:49:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:27,744 INFO L85 PathProgramCache]: Analyzing trace with hash -415918152, now seen corresponding path program 1 times [2021-11-09 10:49:27,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:49:27,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445417054] [2021-11-09 10:49:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:27,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:49:27,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:49:27,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:49:27,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 10:49:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:49:28,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:28,375 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 10:49:28,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:49:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:28,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:49:28,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445417054] [2021-11-09 10:49:28,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445417054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:28,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:28,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 10:49:28,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204388455] [2021-11-09 10:49:28,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:49:28,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:49:28,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:49:28,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:49:28,544 INFO L87 Difference]: Start difference. First operand 2495 states and 3527 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 10:49:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:28,623 INFO L93 Difference]: Finished difference Result 2483 states and 3507 transitions. [2021-11-09 10:49:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:49:28,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 46 [2021-11-09 10:49:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:28,642 INFO L225 Difference]: With dead ends: 2483 [2021-11-09 10:49:28,643 INFO L226 Difference]: Without dead ends: 2483 [2021-11-09 10:49:28,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 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 10:49:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-11-09 10:49:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2483. [2021-11-09 10:49:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 1774 states have (on average 1.9492671927846674) internal successors, (3458), 2463 states have internal predecessors, (3458), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 10:49:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3507 transitions. [2021-11-09 10:49:28,705 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3507 transitions. Word has length 46 [2021-11-09 10:49:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:28,706 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 3507 transitions. [2021-11-09 10:49:28,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 10:49:28,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3507 transitions. [2021-11-09 10:49:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:49:28,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:28,709 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] [2021-11-09 10:49:28,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:28,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:49:28,922 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr107REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:49:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:28,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1705163028, now seen corresponding path program 1 times [2021-11-09 10:49:28,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:49:28,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272449051] [2021-11-09 10:49:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:28,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:49:28,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:49:28,925 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:49:28,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-09 10:49:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:29,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:49:29,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:29,807 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 10:49:29,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:49:30,270 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 10:49:30,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:49:30,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272449051] [2021-11-09 10:49:30,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272449051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:30,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:30,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 10:49:30,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673419453] [2021-11-09 10:49:30,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:49:30,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:49:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:49:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:49:30,273 INFO L87 Difference]: Start difference. First operand 2483 states and 3507 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 10:49:30,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:30,627 INFO L93 Difference]: Finished difference Result 2672 states and 3542 transitions. [2021-11-09 10:49:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:49:30,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 54 [2021-11-09 10:49:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:30,648 INFO L225 Difference]: With dead ends: 2672 [2021-11-09 10:49:30,648 INFO L226 Difference]: Without dead ends: 2672 [2021-11-09 10:49:30,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 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 10:49:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-11-09 10:49:30,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2299. [2021-11-09 10:49:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 1590 states have (on average 1.951572327044025) internal successors, (3103), 2279 states have internal predecessors, (3103), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 10:49:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3152 transitions. [2021-11-09 10:49:30,707 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3152 transitions. Word has length 54 [2021-11-09 10:49:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:30,708 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 3152 transitions. [2021-11-09 10:49:30,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 10:49:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3152 transitions. [2021-11-09 10:49:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 10:49:30,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:30,710 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] [2021-11-09 10:49:30,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:30,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:49:30,934 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr61REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:49:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:30,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2040932875, now seen corresponding path program 1 times [2021-11-09 10:49:30,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:49:30,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685931303] [2021-11-09 10:49:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:30,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:49:30,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:49:30,937 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:49:30,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-09 10:49:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:31,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:49:31,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:31,565 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 10:49:31,571 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 10:49:32,477 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:49:32,481 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 26 treesize of output 28 [2021-11-09 10:49:32,490 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:49:32,491 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 25 treesize of output 21 [2021-11-09 10:49:32,543 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 10:49:32,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:49:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:38,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:49:38,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685931303] [2021-11-09 10:49:38,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685931303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:38,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:38,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 10:49:38,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947143347] [2021-11-09 10:49:38,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:49:38,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:49:38,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:49:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-09 10:49:38,544 INFO L87 Difference]: Start difference. First operand 2299 states and 3152 transitions. Second operand has 6 states, 5 states have (on average 21.0) internal successors, (105), 6 states have internal predecessors, (105), 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 10:50:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:02,621 INFO L93 Difference]: Finished difference Result 2947 states and 3932 transitions. [2021-11-09 10:50:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:50:02,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 21.0) internal successors, (105), 6 states have internal predecessors, (105), 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 57 [2021-11-09 10:50:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:02,638 INFO L225 Difference]: With dead ends: 2947 [2021-11-09 10:50:02,638 INFO L226 Difference]: Without dead ends: 2947 [2021-11-09 10:50:02,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-09 10:50:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-11-09 10:50:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2439. [2021-11-09 10:50:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 1768 states have (on average 1.8998868778280542) internal successors, (3359), 2413 states have internal predecessors, (3359), 31 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-09 10:50:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 3420 transitions. [2021-11-09 10:50:02,713 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 3420 transitions. Word has length 57 [2021-11-09 10:50:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:02,713 INFO L470 AbstractCegarLoop]: Abstraction has 2439 states and 3420 transitions. [2021-11-09 10:50:02,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 21.0) internal successors, (105), 6 states have internal predecessors, (105), 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 10:50:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 3420 transitions. [2021-11-09 10:50:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:50:02,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:02,716 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] [2021-11-09 10:50:02,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:02,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:02,930 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr66REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:50:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:02,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1234498241, now seen corresponding path program 1 times [2021-11-09 10:50:02,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:02,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465335361] [2021-11-09 10:50:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:02,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:02,936 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:02,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-09 10:50:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:50:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:03,794 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 10:50:03,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 10:50:03,865 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 10:50:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:03,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:04,093 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 10:50:04,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:04,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465335361] [2021-11-09 10:50:04,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465335361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:04,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:04,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 10:50:04,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938360712] [2021-11-09 10:50:04,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:50:04,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:04,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:50:04,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:50:04,097 INFO L87 Difference]: Start difference. First operand 2439 states and 3420 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 5 states have internal predecessors, (59), 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 10:50:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:10,508 INFO L93 Difference]: Finished difference Result 2438 states and 3418 transitions. [2021-11-09 10:50:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:50:10,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 5 states have internal predecessors, (59), 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 62 [2021-11-09 10:50:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:10,527 INFO L225 Difference]: With dead ends: 2438 [2021-11-09 10:50:10,527 INFO L226 Difference]: Without dead ends: 2438 [2021-11-09 10:50:10,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 3 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 10:50:10,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-11-09 10:50:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2438. [2021-11-09 10:50:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 1768 states have (on average 1.8987556561085972) internal successors, (3357), 2412 states have internal predecessors, (3357), 31 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-09 10:50:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 3418 transitions. [2021-11-09 10:50:10,584 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 3418 transitions. Word has length 62 [2021-11-09 10:50:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:10,585 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 3418 transitions. [2021-11-09 10:50:10,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 5 states have internal predecessors, (59), 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 10:50:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 3418 transitions. [2021-11-09 10:50:10,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:50:10,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:10,590 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] [2021-11-09 10:50:10,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:10,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:10,809 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr67REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:50:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:10,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1234498240, now seen corresponding path program 1 times [2021-11-09 10:50:10,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:10,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962634484] [2021-11-09 10:50:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:10,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:10,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:10,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:10,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-09 10:50:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:50:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:11,680 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 10:50:11,739 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 10:50:11,754 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 10:50:11,841 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 10:50:11,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-09 10:50:11,886 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 10:50:11,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:12,300 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 10:50:12,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:12,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962634484] [2021-11-09 10:50:12,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962634484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:12,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:12,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-09 10:50:12,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390187102] [2021-11-09 10:50:12,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:50:12,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:50:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:50:12,304 INFO L87 Difference]: Start difference. First operand 2438 states and 3418 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 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 10:50:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:30,179 INFO L93 Difference]: Finished difference Result 2437 states and 3416 transitions. [2021-11-09 10:50:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:50:30,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 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 62 [2021-11-09 10:50:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:30,191 INFO L225 Difference]: With dead ends: 2437 [2021-11-09 10:50:30,191 INFO L226 Difference]: Without dead ends: 2437 [2021-11-09 10:50:30,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 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 10:50:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-11-09 10:50:30,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2437. [2021-11-09 10:50:30,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 1766 states have (on average 1.8997734994337485) internal successors, (3355), 2411 states have internal predecessors, (3355), 31 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-09 10:50:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3416 transitions. [2021-11-09 10:50:30,248 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 3416 transitions. Word has length 62 [2021-11-09 10:50:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:30,248 INFO L470 AbstractCegarLoop]: Abstraction has 2437 states and 3416 transitions. [2021-11-09 10:50:30,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 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 10:50:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 3416 transitions. [2021-11-09 10:50:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 10:50:30,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:30,251 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] [2021-11-09 10:50:30,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:30,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:30,474 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:50:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:30,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1329357862, now seen corresponding path program 1 times [2021-11-09 10:50:30,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:30,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337120758] [2021-11-09 10:50:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:30,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:30,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:30,478 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:30,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-09 10:50:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:50:31,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:31,408 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 10:50:31,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:31,663 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 10:50:31,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:31,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337120758] [2021-11-09 10:50:31,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337120758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:31,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:31,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-09 10:50:31,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44774023] [2021-11-09 10:50:31,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:50:31,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:31,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:50:31,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:50:31,666 INFO L87 Difference]: Start difference. First operand 2437 states and 3416 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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 10:50:31,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:31,885 INFO L93 Difference]: Finished difference Result 2447 states and 3434 transitions. [2021-11-09 10:50:31,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:50:31,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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 70 [2021-11-09 10:50:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:31,913 INFO L225 Difference]: With dead ends: 2447 [2021-11-09 10:50:31,913 INFO L226 Difference]: Without dead ends: 2447 [2021-11-09 10:50:31,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 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 10:50:31,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-11-09 10:50:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2447. [2021-11-09 10:50:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 1774 states have (on average 1.8979706877113867) internal successors, (3367), 2420 states have internal predecessors, (3367), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (36), 21 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-09 10:50:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3434 transitions. [2021-11-09 10:50:31,987 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3434 transitions. Word has length 70 [2021-11-09 10:50:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:31,989 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 3434 transitions. [2021-11-09 10:50:31,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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 10:50:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3434 transitions. [2021-11-09 10:50:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 10:50:31,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:31,991 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] [2021-11-09 10:50:32,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:32,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:32,214 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:50:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash 460494822, now seen corresponding path program 1 times [2021-11-09 10:50:32,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:32,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456454729] [2021-11-09 10:50:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:32,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:32,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:32,218 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:32,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-09 10:50:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:33,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:50:33,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:33,367 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 10:50:33,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:33,706 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 10:50:33,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:33,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456454729] [2021-11-09 10:50:33,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456454729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 10:50:33,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:33,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 10:50:33,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217083900] [2021-11-09 10:50:33,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:50:33,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:33,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:50:33,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:50:33,709 INFO L87 Difference]: Start difference. First operand 2447 states and 3434 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 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 10:50:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:34,529 INFO L93 Difference]: Finished difference Result 2461 states and 3462 transitions. [2021-11-09 10:50:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:50:34,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 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 72 [2021-11-09 10:50:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:34,538 INFO L225 Difference]: With dead ends: 2461 [2021-11-09 10:50:34,539 INFO L226 Difference]: Without dead ends: 2457 [2021-11-09 10:50:34,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:50:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-11-09 10:50:34,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2453. [2021-11-09 10:50:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 1780 states have (on average 1.896067415730337) internal successors, (3375), 2426 states have internal predecessors, (3375), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (36), 21 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-09 10:50:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3442 transitions. [2021-11-09 10:50:34,620 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3442 transitions. Word has length 72 [2021-11-09 10:50:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:34,620 INFO L470 AbstractCegarLoop]: Abstraction has 2453 states and 3442 transitions. [2021-11-09 10:50:34,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 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 10:50:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3442 transitions. [2021-11-09 10:50:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 10:50:34,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:34,629 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] [2021-11-09 10:50:34,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:34,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:34,842 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:50:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:34,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1298214758, now seen corresponding path program 2 times [2021-11-09 10:50:34,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:34,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480831682] [2021-11-09 10:50:34,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:50:34,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:34,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:34,846 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:34,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-09 10:50:36,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:50:36,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:36,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:50:36,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:36,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:37,209 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:37,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480831682] [2021-11-09 10:50:37,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480831682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 10:50:37,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:37,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-09 10:50:37,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811581435] [2021-11-09 10:50:37,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:50:37,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:50:37,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:50:37,212 INFO L87 Difference]: Start difference. First operand 2453 states and 3442 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 10:50:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:39,489 INFO L93 Difference]: Finished difference Result 2481 states and 3510 transitions. [2021-11-09 10:50:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:50:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 76 [2021-11-09 10:50:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:39,499 INFO L225 Difference]: With dead ends: 2481 [2021-11-09 10:50:39,499 INFO L226 Difference]: Without dead ends: 2477 [2021-11-09 10:50:39,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:50:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-11-09 10:50:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 2465. [2021-11-09 10:50:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 1792 states have (on average 1.8922991071428572) internal successors, (3391), 2438 states have internal predecessors, (3391), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (36), 21 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-09 10:50:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 3458 transitions. [2021-11-09 10:50:39,566 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 3458 transitions. Word has length 76 [2021-11-09 10:50:39,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:39,566 INFO L470 AbstractCegarLoop]: Abstraction has 2465 states and 3458 transitions. [2021-11-09 10:50:39,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 10:50:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 3458 transitions. [2021-11-09 10:50:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-09 10:50:39,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:39,568 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:50:39,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:39,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:39,790 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:50:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:39,790 INFO L85 PathProgramCache]: Analyzing trace with hash 316087910, now seen corresponding path program 3 times [2021-11-09 10:50:39,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:39,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662886028] [2021-11-09 10:50:39,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:50:39,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:39,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:39,793 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:39,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-09 10:50:41,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 10:50:41,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:41,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:50:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:42,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:44,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:44,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662886028] [2021-11-09 10:50:44,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662886028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 10:50:44,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:44,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-09 10:50:44,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065624848] [2021-11-09 10:50:44,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:50:44,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:44,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:50:44,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:50:44,893 INFO L87 Difference]: Start difference. First operand 2465 states and 3458 transitions. Second operand has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 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 10:50:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:57,549 INFO L93 Difference]: Finished difference Result 2521 states and 3642 transitions. [2021-11-09 10:50:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 10:50:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 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 84 [2021-11-09 10:50:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:57,559 INFO L225 Difference]: With dead ends: 2521 [2021-11-09 10:50:57,560 INFO L226 Difference]: Without dead ends: 2515 [2021-11-09 10:50:57,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1377, Invalid=2783, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 10:50:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-11-09 10:50:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2489. [2021-11-09 10:50:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 1816 states have (on average 1.8843612334801763) internal successors, (3422), 2462 states have internal predecessors, (3422), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (36), 21 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-09 10:50:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 3489 transitions. [2021-11-09 10:50:57,632 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 3489 transitions. Word has length 84 [2021-11-09 10:50:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:57,633 INFO L470 AbstractCegarLoop]: Abstraction has 2489 states and 3489 transitions. [2021-11-09 10:50:57,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 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 10:50:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 3489 transitions. [2021-11-09 10:50:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 10:50:57,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:57,636 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:50:57,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:57,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:57,854 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:50:57,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:57,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1218837606, now seen corresponding path program 4 times [2021-11-09 10:50:57,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:57,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005886232] [2021-11-09 10:50:57,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:50:57,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:57,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:57,858 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:57,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-09 10:50:58,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:50:58,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:58,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 10:50:58,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:00,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:51:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:06,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:51:06,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005886232] [2021-11-09 10:51:06,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005886232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 10:51:06,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:06,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-09 10:51:06,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867859797] [2021-11-09 10:51:06,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 10:51:06,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:51:06,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 10:51:06,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 10:51:06,528 INFO L87 Difference]: Start difference. First operand 2489 states and 3489 transitions. Second operand has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 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 10:51:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:29,612 INFO L93 Difference]: Finished difference Result 2581 states and 3754 transitions. [2021-11-09 10:51:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-09 10:51:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 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 100 [2021-11-09 10:51:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:29,624 INFO L225 Difference]: With dead ends: 2581 [2021-11-09 10:51:29,624 INFO L226 Difference]: Without dead ends: 2577 [2021-11-09 10:51:29,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=4503, Invalid=14679, Unknown=0, NotChecked=0, Total=19182 [2021-11-09 10:51:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-11-09 10:51:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2519. [2021-11-09 10:51:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 1846 states have (on average 1.8786565547128928) internal successors, (3468), 2492 states have internal predecessors, (3468), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (36), 21 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-09 10:51:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 3535 transitions. [2021-11-09 10:51:29,709 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 3535 transitions. Word has length 100 [2021-11-09 10:51:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:29,710 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 3535 transitions. [2021-11-09 10:51:29,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 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 10:51:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 3535 transitions. [2021-11-09 10:51:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-09 10:51:29,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:29,713 INFO L513 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:29,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:29,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:51:29,926 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 847 more)] === [2021-11-09 10:51:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1636743514, now seen corresponding path program 5 times [2021-11-09 10:51:29,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:51:29,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051576030] [2021-11-09 10:51:29,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:51:29,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:51:29,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:51:29,930 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:51:29,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfa6114-3f36-4b53-8111-8a11ffced988/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-09 10:51:32,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-09 10:51:32,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:32,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 10:51:32,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:32,328 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 10:51:32,638 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-09 10:51:32,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-11-09 10:51:32,719 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 27 treesize of output 23 [2021-11-09 10:51:33,091 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 42 treesize of output 30