./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-2.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_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/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_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/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_d4222575-e633-4197-a1b5-d51e25dda4ad/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 2fe3fcfd23f0db0414af322b91d2d32e3943484ebce4a900c0ef2633a5499508 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:50:23,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:50:23,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:50:23,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:50:23,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:50:23,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:50:23,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:50:23,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:50:23,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:50:23,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:50:23,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:50:23,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:50:23,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:50:23,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:50:23,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:50:23,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:50:23,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:50:23,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:50:24,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:50:24,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:50:24,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:50:24,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:50:24,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:50:24,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:50:24,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:50:24,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:50:24,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:50:24,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:50:24,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:50:24,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:50:24,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:50:24,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:50:24,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:50:24,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:50:24,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:50:24,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:50:24,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:50:24,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:50:24,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:50:24,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:50:24,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:50:24,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 10:50:24,069 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:50:24,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:50:24,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:50:24,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:50:24,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:50:24,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:50:24,084 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:50:24,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:50:24,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:50:24,085 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:50:24,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:50:24,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:50:24,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:50:24,087 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 10:50:24,087 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 10:50:24,088 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 10:50:24,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:50:24,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 10:50:24,089 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:50:24,089 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:50:24,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:50:24,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:50:24,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:50:24,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:50:24,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:50:24,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:50:24,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:50:24,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:50:24,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:50:24,094 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_d4222575-e633-4197-a1b5-d51e25dda4ad/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fe3fcfd23f0db0414af322b91d2d32e3943484ebce4a900c0ef2633a5499508 [2021-11-09 10:50:24,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:50:24,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:50:24,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:50:24,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:50:24,481 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:50:24,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-2.i [2021-11-09 10:50:24,606 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/data/d2ee86f1b/0f57e59632304f6683c9b554343fa417/FLAG0b9b3cc14 [2021-11-09 10:50:25,315 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:50:25,316 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-2.i [2021-11-09 10:50:25,337 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/data/d2ee86f1b/0f57e59632304f6683c9b554343fa417/FLAG0b9b3cc14 [2021-11-09 10:50:25,588 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/data/d2ee86f1b/0f57e59632304f6683c9b554343fa417 [2021-11-09 10:50:25,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:50:25,593 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 10:50:25,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:50:25,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:50:25,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:50:25,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:25" (1/1) ... [2021-11-09 10:50:25,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f4da2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25, skipping insertion in model container [2021-11-09 10:50:25,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:25" (1/1) ... [2021-11-09 10:50:25,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:50:25,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:50:26,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:50:26,115 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 10:50:26,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64f6ee4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:26, skipping insertion in model container [2021-11-09 10:50:26,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:50:26,117 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-09 10:50:26,119 INFO L168 Benchmark]: Toolchain (without parser) took 525.10 ms. Allocated memory is still 121.6 MB. Free memory was 87.9 MB in the beginning and 96.7 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:50:26,120 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 90.2 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:50:26,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 521.66 ms. Allocated memory is still 121.6 MB. Free memory was 87.6 MB in the beginning and 96.7 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:50:26,124 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 90.2 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 521.66 ms. Allocated memory is still 121.6 MB. Free memory was 87.6 MB in the beginning and 96.7 MB in the end (delta: -9.1 MB). 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: 555]: 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_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/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_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/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_d4222575-e633-4197-a1b5-d51e25dda4ad/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 2fe3fcfd23f0db0414af322b91d2d32e3943484ebce4a900c0ef2633a5499508 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:50:28,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:50:28,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:50:29,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:50:29,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:50:29,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:50:29,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:50:29,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:50:29,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:50:29,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:50:29,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:50:29,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:50:29,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:50:29,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:50:29,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:50:29,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:50:29,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:50:29,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:50:29,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:50:29,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:50:29,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:50:29,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:50:29,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:50:29,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:50:29,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:50:29,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:50:29,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:50:29,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:50:29,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:50:29,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:50:29,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:50:29,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:50:29,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:50:29,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:50:29,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:50:29,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:50:29,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:50:29,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:50:29,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:50:29,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:50:29,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:50:29,076 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-09 10:50:29,114 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:50:29,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:50:29,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:50:29,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:50:29,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:50:29,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:50:29,121 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:50:29,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:50:29,122 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:50:29,122 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:50:29,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:50:29,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:50:29,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:50:29,124 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 10:50:29,125 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 10:50:29,125 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 10:50:29,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:50:29,126 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 10:50:29,126 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 10:50:29,126 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 10:50:29,127 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:50:29,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:50:29,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:50:29,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:50:29,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:50:29,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:50:29,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:50:29,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:50:29,130 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 10:50:29,130 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 10:50:29,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:50:29,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 10:50:29,131 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_d4222575-e633-4197-a1b5-d51e25dda4ad/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fe3fcfd23f0db0414af322b91d2d32e3943484ebce4a900c0ef2633a5499508 [2021-11-09 10:50:29,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:50:29,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:50:29,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:50:29,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:50:29,683 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:50:29,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-2.i [2021-11-09 10:50:29,778 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/data/218181161/c7dc966f3d3f405aafe976dbce666af0/FLAGd250b8c1c [2021-11-09 10:50:30,590 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:50:30,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/sv-benchmarks/c/memsafety-ext2/optional_data_creation_test04-2.i [2021-11-09 10:50:30,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/data/218181161/c7dc966f3d3f405aafe976dbce666af0/FLAGd250b8c1c [2021-11-09 10:50:30,772 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/data/218181161/c7dc966f3d3f405aafe976dbce666af0 [2021-11-09 10:50:30,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:50:30,779 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 10:50:30,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:50:30,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:50:30,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:50:30,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:30" (1/1) ... [2021-11-09 10:50:30,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e61ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:30, skipping insertion in model container [2021-11-09 10:50:30,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:30" (1/1) ... [2021-11-09 10:50:30,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:50:30,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:50:31,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:50:31,390 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-09 10:50:31,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:50:31,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:50:31,505 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:50:31,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:50:31,633 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:50:31,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:31 WrapperNode [2021-11-09 10:50:31,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:50:31,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:50:31,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:50:31,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:50:31,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:31" (1/1) ... [2021-11-09 10:50:31,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:31" (1/1) ... [2021-11-09 10:50:31,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:31" (1/1) ... [2021-11-09 10:50:31,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:31" (1/1) ... [2021-11-09 10:50:31,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:31" (1/1) ... [2021-11-09 10:50:31,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:31" (1/1) ... [2021-11-09 10:50:31,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:31" (1/1) ... [2021-11-09 10:50:31,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:50:31,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:50:31,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:50:31,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:50:31,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:31" (1/1) ... [2021-11-09 10:50:31,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:50:31,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:31,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:50:31,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:50:31,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 10:50:31,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:50:31,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 10:50:31,842 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 10:50:31,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 10:50:31,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 10:50:31,843 INFO L138 BoogieDeclarations]: Found implementation of procedure create_data [2021-11-09 10:50:31,843 INFO L138 BoogieDeclarations]: Found implementation of procedure freeData [2021-11-09 10:50:31,843 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-09 10:50:31,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 10:50:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 10:50:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 10:50:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 10:50:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 10:50:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 10:50:31,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:50:31,845 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 10:50:31,845 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 10:50:31,845 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 10:50:31,845 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 10:50:31,845 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 10:50:31,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 10:50:31,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 10:50:31,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 10:50:31,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 10:50:31,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 10:50:31,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 10:50:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 10:50:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 10:50:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 10:50:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 10:50:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 10:50:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 10:50:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 10:50:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 10:50:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 10:50:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 10:50:31,848 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 10:50:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 10:50:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 10:50:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 10:50:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 10:50:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 10:50:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 10:50:31,850 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 10:50:31,850 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 10:50:31,850 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 10:50:31,850 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 10:50:31,850 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 10:50:31,850 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 10:50:31,851 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 10:50:31,851 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 10:50:31,851 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 10:50:31,851 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 10:50:31,851 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 10:50:31,851 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 10:50:31,852 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 10:50:31,852 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 10:50:31,852 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 10:50:31,852 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 10:50:31,852 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 10:50:31,852 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 10:50:31,853 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 10:50:31,853 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 10:50:31,853 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 10:50:31,853 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 10:50:31,853 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 10:50:31,853 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 10:50:31,854 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 10:50:31,854 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 10:50:31,854 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 10:50:31,854 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 10:50:31,854 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-09 10:50:31,854 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 10:50:31,855 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 10:50:31,855 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 10:50:31,855 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 10:50:31,855 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 10:50:31,855 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 10:50:31,856 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 10:50:31,856 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 10:50:31,856 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 10:50:31,856 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 10:50:31,856 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 10:50:31,857 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 10:50:31,857 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 10:50:31,857 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 10:50:31,857 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 10:50:31,857 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 10:50:31,857 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 10:50:31,858 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 10:50:31,858 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 10:50:31,858 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 10:50:31,858 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 10:50:31,858 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 10:50:31,858 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 10:50:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 10:50:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 10:50:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 10:50:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 10:50:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 10:50:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 10:50:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 10:50:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 10:50:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 10:50:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 10:50:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 10:50:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 10:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 10:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 10:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 10:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 10:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 10:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 10:50:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 10:50:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 10:50:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 10:50:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 10:50:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 10:50:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 10:50:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-09 10:50:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure create_data [2021-11-09 10:50:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 10:50:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 10:50:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 10:50:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 10:50:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure freeData [2021-11-09 10:50:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:50:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-09 10:50:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 10:50:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-09 10:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 10:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 10:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 10:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-09 10:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-09 10:50:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 10:50:32,933 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:50:32,933 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-09 10:50:32,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:32 BoogieIcfgContainer [2021-11-09 10:50:32,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:50:32,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:50:32,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:50:32,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:50:32,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:50:30" (1/3) ... [2021-11-09 10:50:32,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700b7ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:32, skipping insertion in model container [2021-11-09 10:50:32,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:31" (2/3) ... [2021-11-09 10:50:32,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700b7ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:32, skipping insertion in model container [2021-11-09 10:50:32,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:32" (3/3) ... [2021-11-09 10:50:32,947 INFO L111 eAbstractionObserver]: Analyzing ICFG optional_data_creation_test04-2.i [2021-11-09 10:50:32,954 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:50:32,954 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-11-09 10:50:33,014 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:50:33,022 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 10:50:33,023 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-11-09 10:50:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 99 states have internal predecessors, (109), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:50:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 10:50:33,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:33,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:33,083 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:50:33,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:33,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1425605137, now seen corresponding path program 1 times [2021-11-09 10:50:33,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:33,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521240961] [2021-11-09 10:50:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:33,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:33,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:33,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:33,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 10:50:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:33,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 10:50:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:33,444 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 10:50:33,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:33,495 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 10:50:33,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:33,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521240961] [2021-11-09 10:50:33,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521240961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:33,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:33,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:50:33,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708679096] [2021-11-09 10:50:33,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:50:33,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:33,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:50:33,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:50:33,529 INFO L87 Difference]: Start difference. First operand has 110 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 99 states have internal predecessors, (109), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 10:50:33,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:33,570 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2021-11-09 10:50:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:50:33,572 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 8 [2021-11-09 10:50:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:33,587 INFO L225 Difference]: With dead ends: 110 [2021-11-09 10:50:33,587 INFO L226 Difference]: Without dead ends: 107 [2021-11-09 10:50:33,589 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 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 10:50:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-09 10:50:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-09 10:50:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 52 states have (on average 2.0) internal successors, (104), 97 states have internal predecessors, (104), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-09 10:50:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-11-09 10:50:33,658 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 8 [2021-11-09 10:50:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:33,659 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-11-09 10:50:33,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 10:50:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-11-09 10:50:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:50:33,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:33,661 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:33,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:33,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:33,876 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:50:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:33,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1244153200, now seen corresponding path program 1 times [2021-11-09 10:50:33,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:33,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257218237] [2021-11-09 10:50:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:33,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:33,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:33,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:33,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 10:50:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:34,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:50:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:34,171 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 10:50:34,289 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-09 10:50:34,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-09 10:50:34,384 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 10:50:34,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:34,501 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 10:50:34,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:34,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257218237] [2021-11-09 10:50:34,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257218237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:34,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:34,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 10:50:34,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197513806] [2021-11-09 10:50:34,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:50:34,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:34,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:50:34,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:50:34,512 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:35,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:35,226 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2021-11-09 10:50:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:50:35,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 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 10:50:35,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:35,233 INFO L225 Difference]: With dead ends: 116 [2021-11-09 10:50:35,233 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 10:50:35,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:50:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 10:50:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2021-11-09 10:50:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 98 states have internal predecessors, (107), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:50:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2021-11-09 10:50:35,253 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 9 [2021-11-09 10:50:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:35,254 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2021-11-09 10:50:35,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2021-11-09 10:50:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:50:35,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:35,256 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:35,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:35,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:35,475 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:50:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1244153201, now seen corresponding path program 1 times [2021-11-09 10:50:35,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:35,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995236451] [2021-11-09 10:50:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:35,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:35,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:35,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:35,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 10:50:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:50:35,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:35,716 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 10:50:35,724 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 10:50:35,883 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:50:35,884 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 10:50:35,904 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:50:35,905 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 10:50:35,947 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 10:50:35,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:38,636 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 10:50:38,637 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:38,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995236451] [2021-11-09 10:50:38,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995236451] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:38,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:38,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-09 10:50:38,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222163190] [2021-11-09 10:50:38,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:50:38,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:38,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:50:38,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=39, Unknown=1, NotChecked=0, Total=56 [2021-11-09 10:50:38,646 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:54,411 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-11-09 10:50:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:50:54,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-09 10:50:54,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:54,414 INFO L225 Difference]: With dead ends: 114 [2021-11-09 10:50:54,415 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 10:50:54,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2021-11-09 10:50:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 10:50:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2021-11-09 10:50:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 98 states have internal predecessors, (106), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:50:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2021-11-09 10:50:54,428 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 9 [2021-11-09 10:50:54,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:54,429 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2021-11-09 10:50:54,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2021-11-09 10:50:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:50:54,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:54,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:54,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:54,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:54,631 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr2REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:50:54,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:54,632 INFO L85 PathProgramCache]: Analyzing trace with hash -85956322, now seen corresponding path program 1 times [2021-11-09 10:50:54,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:54,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364390969] [2021-11-09 10:50:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:54,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:54,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:54,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 10:50:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:50:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:54,872 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 10:50:54,894 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 10:50:54,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:54,947 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 10:50:54,948 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:54,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364390969] [2021-11-09 10:50:54,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364390969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:54,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:54,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:50:54,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132845536] [2021-11-09 10:50:54,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:50:54,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:50:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:50:54,958 INFO L87 Difference]: Start difference. First operand 109 states and 117 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:55,214 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-11-09 10:50:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:50:55,215 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, (3), 1 states have call predecessors, (3), 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 10:50:55,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:55,216 INFO L225 Difference]: With dead ends: 108 [2021-11-09 10:50:55,216 INFO L226 Difference]: Without dead ends: 108 [2021-11-09 10:50:55,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 10:50:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-09 10:50:55,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-09 10:50:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 97 states have internal predecessors, (105), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:50:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2021-11-09 10:50:55,238 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 10 [2021-11-09 10:50:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:55,239 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2021-11-09 10:50:55,240 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2021-11-09 10:50:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:50:55,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:55,241 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:55,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:55,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:55,451 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr3REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:50:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash -85956321, now seen corresponding path program 1 times [2021-11-09 10:50:55,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:55,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110226635] [2021-11-09 10:50:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:55,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:55,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:55,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:55,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 10:50:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:55,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:50:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:55,688 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 10:50:55,737 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 10:50:55,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:55,869 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 10:50:55,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:55,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110226635] [2021-11-09 10:50:55,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110226635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:55,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:55,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 10:50:55,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588757024] [2021-11-09 10:50:55,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:50:55,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:50:55,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:50:55,884 INFO L87 Difference]: Start difference. First operand 108 states and 116 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:56,282 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2021-11-09 10:50:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:50:56,284 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, (3), 1 states have call predecessors, (3), 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 10:50:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:56,285 INFO L225 Difference]: With dead ends: 107 [2021-11-09 10:50:56,285 INFO L226 Difference]: Without dead ends: 107 [2021-11-09 10:50:56,286 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 10:50:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-09 10:50:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-09 10:50:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 96 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:50:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2021-11-09 10:50:56,295 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 10 [2021-11-09 10:50:56,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:56,296 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2021-11-09 10:50:56,296 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, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2021-11-09 10:50:56,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:50:56,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:56,297 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:56,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:56,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:56,511 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting create_dataErr0REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:50:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:56,512 INFO L85 PathProgramCache]: Analyzing trace with hash 963677749, now seen corresponding path program 1 times [2021-11-09 10:50:56,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:56,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446970242] [2021-11-09 10:50:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:56,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:56,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:56,515 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:56,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 10:50:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:56,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:50:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:56,766 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 10:50:56,826 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-09 10:50:56,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-09 10:50:56,856 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 10:50:56,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:50:56,942 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 10:50:56,943 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:50:56,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446970242] [2021-11-09 10:50:56,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446970242] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:56,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:56,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:50:56,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712575482] [2021-11-09 10:50:56,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:50:56,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:50:56,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:50:56,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:50:56,945 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:57,181 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2021-11-09 10:50:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:50:57,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-09 10:50:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:57,183 INFO L225 Difference]: With dead ends: 105 [2021-11-09 10:50:57,183 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 10:50:57,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 2 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 10:50:57,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 10:50:57,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-11-09 10:50:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 92 states have internal predecessors, (100), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:50:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2021-11-09 10:50:57,202 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 15 [2021-11-09 10:50:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:57,203 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2021-11-09 10:50:57,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2021-11-09 10:50:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:50:57,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:57,204 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:57,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:57,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:50:57,413 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting create_dataErr1REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:50:57,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:57,414 INFO L85 PathProgramCache]: Analyzing trace with hash 963677750, now seen corresponding path program 1 times [2021-11-09 10:50:57,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:50:57,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754146851] [2021-11-09 10:50:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:57,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:50:57,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:50:57,416 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:50:57,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 10:50:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:57,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:50:57,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:57,709 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 10:50:57,730 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 10:50:57,835 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:50:57,836 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 10:50:57,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:50:57,852 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 10:50:57,897 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 10:50:57,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:51:01,505 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 10:51:01,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:51:01,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754146851] [2021-11-09 10:51:01,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754146851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:01,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:01,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 10:51:01,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990004724] [2021-11-09 10:51:01,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:51:01,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:51:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:51:01,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-09 10:51:01,508 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:51:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:02,280 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2021-11-09 10:51:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:51:02,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-09 10:51:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:02,283 INFO L225 Difference]: With dead ends: 105 [2021-11-09 10:51:02,283 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 10:51:02,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-09 10:51:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 10:51:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-11-09 10:51:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 88 states have internal predecessors, (96), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:51:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2021-11-09 10:51:02,292 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 15 [2021-11-09 10:51:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:02,293 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2021-11-09 10:51:02,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:51:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2021-11-09 10:51:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 10:51:02,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:02,295 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:02,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-09 10:51:02,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:51:02,509 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr4REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:51:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:02,510 INFO L85 PathProgramCache]: Analyzing trace with hash -190753018, now seen corresponding path program 1 times [2021-11-09 10:51:02,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:51:02,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206475804] [2021-11-09 10:51:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:02,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:51:02,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:51:02,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:51:02,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 10:51:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:02,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:51:02,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:02,738 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 10:51:02,826 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 10:51:02,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:51:03,021 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 10:51:03,021 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:51:03,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206475804] [2021-11-09 10:51:03,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206475804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:03,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:03,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 10:51:03,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968096983] [2021-11-09 10:51:03,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:51:03,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:51:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:51:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:51:03,024 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 10:51:03,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:03,596 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-11-09 10:51:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:51:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2021-11-09 10:51:03,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:03,599 INFO L225 Difference]: With dead ends: 133 [2021-11-09 10:51:03,599 INFO L226 Difference]: Without dead ends: 133 [2021-11-09 10:51:03,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:51:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-09 10:51:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-11-09 10:51:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 87 states have internal predecessors, (95), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:51:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2021-11-09 10:51:03,609 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 16 [2021-11-09 10:51:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:03,609 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2021-11-09 10:51:03,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 10:51:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2021-11-09 10:51:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 10:51:03,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:03,611 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:03,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:03,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:51:03,825 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr5REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:51:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:03,826 INFO L85 PathProgramCache]: Analyzing trace with hash -190753017, now seen corresponding path program 1 times [2021-11-09 10:51:03,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:51:03,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970363095] [2021-11-09 10:51:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:03,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:51:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:51:03,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:51:03,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 10:51:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:51:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:04,053 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 10:51:04,189 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 10:51:04,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:51:04,642 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 10:51:04,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:51:04,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970363095] [2021-11-09 10:51:04,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970363095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:04,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:04,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 10:51:04,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358353788] [2021-11-09 10:51:04,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:51:04,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:51:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:51:04,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:51:04,645 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 10:51:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:05,619 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2021-11-09 10:51:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:51:05,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-11-09 10:51:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:05,623 INFO L225 Difference]: With dead ends: 107 [2021-11-09 10:51:05,623 INFO L226 Difference]: Without dead ends: 107 [2021-11-09 10:51:05,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:51:05,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-09 10:51:05,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2021-11-09 10:51:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 89 states have internal predecessors, (97), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 10:51:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-11-09 10:51:05,633 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 16 [2021-11-09 10:51:05,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:05,634 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-11-09 10:51:05,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 10:51:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-11-09 10:51:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 10:51:05,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:05,636 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:05,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:05,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:51:05,836 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr6REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:51:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:05,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1369948231, now seen corresponding path program 1 times [2021-11-09 10:51:05,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:51:05,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109761257] [2021-11-09 10:51:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:05,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:51:05,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:51:05,846 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:51:05,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-09 10:51:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:06,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:51:06,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:06,238 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 10:51:06,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:51:06,422 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 10:51:06,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:51:06,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109761257] [2021-11-09 10:51:06,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109761257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:06,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:06,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 10:51:06,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795435598] [2021-11-09 10:51:06,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:51:06,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:51:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:51:06,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:51:06,426 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 10:51:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:06,974 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-11-09 10:51:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:51:06,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2021-11-09 10:51:06,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:06,976 INFO L225 Difference]: With dead ends: 133 [2021-11-09 10:51:06,977 INFO L226 Difference]: Without dead ends: 133 [2021-11-09 10:51:06,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:51:06,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-09 10:51:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 100. [2021-11-09 10:51:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 88 states have internal predecessors, (96), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 10:51:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2021-11-09 10:51:06,984 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 18 [2021-11-09 10:51:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:06,984 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2021-11-09 10:51:06,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 10:51:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2021-11-09 10:51:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 10:51:06,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:06,985 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:07,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:07,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:51:07,208 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr7REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:51:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:07,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1369948232, now seen corresponding path program 1 times [2021-11-09 10:51:07,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:51:07,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311765135] [2021-11-09 10:51:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:07,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:51:07,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:51:07,210 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:51:07,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-09 10:51:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:07,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:51:07,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:07,675 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 10:51:07,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:51:08,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-11-09 10:51:08,404 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 10:51:08,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:51:08,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311765135] [2021-11-09 10:51:08,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311765135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:08,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:08,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-09 10:51:08,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251338315] [2021-11-09 10:51:08,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:51:08,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:51:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:51:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:51:08,407 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 10:51:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:09,835 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2021-11-09 10:51:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:51:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2021-11-09 10:51:09,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:09,838 INFO L225 Difference]: With dead ends: 102 [2021-11-09 10:51:09,838 INFO L226 Difference]: Without dead ends: 102 [2021-11-09 10:51:09,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:51:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-09 10:51:09,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-09 10:51:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 90 states have internal predecessors, (98), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 10:51:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-11-09 10:51:09,845 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 18 [2021-11-09 10:51:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:09,846 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-11-09 10:51:09,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 10:51:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-11-09 10:51:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:51:09,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:09,848 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:09,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:10,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:51:10,055 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting create_dataErr4REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:51:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash -713507424, now seen corresponding path program 1 times [2021-11-09 10:51:10,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:51:10,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703032068] [2021-11-09 10:51:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:10,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:51:10,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:51:10,058 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:51:10,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-09 10:51:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:51:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:10,353 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 10:51:10,376 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 10:51:10,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-09 10:51:10,453 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 10:51:10,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:51:10,558 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 10:51:10,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:51:10,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703032068] [2021-11-09 10:51:10,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703032068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:10,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:10,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 10:51:10,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943598751] [2021-11-09 10:51:10,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:51:10,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:51:10,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:51:10,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:51:10,561 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:51:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:11,142 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2021-11-09 10:51:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:51:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-09 10:51:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:11,145 INFO L225 Difference]: With dead ends: 110 [2021-11-09 10:51:11,145 INFO L226 Difference]: Without dead ends: 110 [2021-11-09 10:51:11,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:51:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-09 10:51:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2021-11-09 10:51:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 93 states have internal predecessors, (103), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 10:51:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2021-11-09 10:51:11,151 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 19 [2021-11-09 10:51:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:11,151 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2021-11-09 10:51:11,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:51:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2021-11-09 10:51:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:51:11,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:11,153 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:11,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:11,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:51:11,355 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting create_dataErr5REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:51:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash -713507423, now seen corresponding path program 1 times [2021-11-09 10:51:11,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:51:11,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965230408] [2021-11-09 10:51:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:11,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:51:11,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:51:11,357 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:51:11,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-09 10:51:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:11,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:51:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:11,636 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 10:51:11,672 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 10:51:11,683 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 10:51:11,809 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 10:51:11,816 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 10:51:11,864 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 10:51:11,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:51:12,495 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 10:51:12,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:51:12,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965230408] [2021-11-09 10:51:12,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965230408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:12,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:12,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-09 10:51:12,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735459941] [2021-11-09 10:51:12,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:51:12,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:51:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:51:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:51:12,498 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:51:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:14,426 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2021-11-09 10:51:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:51:14,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-09 10:51:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:14,428 INFO L225 Difference]: With dead ends: 106 [2021-11-09 10:51:14,429 INFO L226 Difference]: Without dead ends: 106 [2021-11-09 10:51:14,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:51:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-09 10:51:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-11-09 10:51:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 62 states have (on average 1.6290322580645162) internal successors, (101), 93 states have internal predecessors, (101), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 10:51:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2021-11-09 10:51:14,435 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 19 [2021-11-09 10:51:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:14,436 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2021-11-09 10:51:14,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:51:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2021-11-09 10:51:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:51:14,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:14,438 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] [2021-11-09 10:51:14,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:14,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:51:14,643 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr5REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:51:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1726338626, now seen corresponding path program 1 times [2021-11-09 10:51:14,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:51:14,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790232508] [2021-11-09 10:51:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:14,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:51:14,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:51:14,646 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:51:14,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-09 10:51:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:51:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:14,962 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 10:51:14,972 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 10:51:15,320 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:51:15,320 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 30 treesize of output 32 [2021-11-09 10:51:15,335 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:51:15,335 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 29 treesize of output 29 [2021-11-09 10:51:15,411 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 10:51:15,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:51:22,109 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_BEFORE_CALL_6 (_ BitVec 32)) (v_append_~node~0.offset_BEFORE_CALL_4 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) v_append_~node~0.offset_BEFORE_CALL_4))) (and (bvule v_append_~node~0.offset_BEFORE_CALL_4 .cse0) (bvule .cse0 (select |c_#length| v_append_~node~0.base_BEFORE_CALL_6)))) (exists ((v_create_data_~data~0.base_19 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_19)))))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~node~0.offset_BEFORE_CALL_4))) (or (not (bvule .cse1 (select (store |c_old(#length)| v_create_data_~data~0.base_19 (_ bv8 32)) v_append_~node~0.base_BEFORE_CALL_6))) (not (bvule v_append_~node~0.offset_BEFORE_CALL_4 .cse1)))))))) is different from false [2021-11-09 10:51:31,565 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 10:51:31,565 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:51:31,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790232508] [2021-11-09 10:51:31,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790232508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:31,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:31,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-09 10:51:31,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309700942] [2021-11-09 10:51:31,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:51:31,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:51:31,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:51:31,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=4, NotChecked=14, Total=90 [2021-11-09 10:51:31,569 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 10:51:46,205 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_append_~node~0.base_BEFORE_CALL_6 (_ BitVec 32)) (v_append_~node~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_create_data_~data~0.base_20 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) v_append_~node~0.offset_BEFORE_CALL_4))) (and (bvule v_append_~node~0.offset_BEFORE_CALL_4 .cse0) (bvule .cse0 (select (store |c_#length| v_create_data_~data~0.base_20 (_ bv8 32)) v_append_~node~0.base_BEFORE_CALL_6)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_create_data_~data~0.base_20)))) (exists ((v_create_data_~data~0.base_19 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_19)))))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~node~0.offset_BEFORE_CALL_4))) (or (not (bvule .cse1 (select (store |c_old(#length)| v_create_data_~data~0.base_19 (_ bv8 32)) v_append_~node~0.base_BEFORE_CALL_6))) (not (bvule v_append_~node~0.offset_BEFORE_CALL_4 .cse1)))))))) (forall ((v_append_~node~0.base_BEFORE_CALL_6 (_ BitVec 32)) (v_append_~node~0.offset_BEFORE_CALL_4 (_ BitVec 32))) (or (let ((.cse2 (bvadd (_ bv4 32) v_append_~node~0.offset_BEFORE_CALL_4))) (and (bvule v_append_~node~0.offset_BEFORE_CALL_4 .cse2) (bvule .cse2 (select |c_#length| v_append_~node~0.base_BEFORE_CALL_6)))) (exists ((v_create_data_~data~0.base_19 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_19)))))))) (let ((.cse3 (bvadd (_ bv4 32) v_append_~node~0.offset_BEFORE_CALL_4))) (or (not (bvule .cse3 (select (store |c_old(#length)| v_create_data_~data~0.base_19 (_ bv8 32)) v_append_~node~0.base_BEFORE_CALL_6))) (not (bvule v_append_~node~0.offset_BEFORE_CALL_4 .cse3)))))))) (exists ((create_data_~data~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| create_data_~data~0.base (_ bv8 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| create_data_~data~0.base)))))))) is different from false [2021-11-09 10:52:12,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:12,595 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-11-09 10:52:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:52:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2021-11-09 10:52:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:12,612 INFO L225 Difference]: With dead ends: 125 [2021-11-09 10:52:12,613 INFO L226 Difference]: Without dead ends: 125 [2021-11-09 10:52:12,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=53, Invalid=104, Unknown=7, NotChecked=46, Total=210 [2021-11-09 10:52:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-09 10:52:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-11-09 10:52:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 97 states have internal predecessors, (105), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-09 10:52:12,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2021-11-09 10:52:12,619 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 20 [2021-11-09 10:52:12,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:12,619 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2021-11-09 10:52:12,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 10:52:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2021-11-09 10:52:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:52:12,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:12,621 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] [2021-11-09 10:52:12,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:12,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:52:12,823 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:52:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1141335566, now seen corresponding path program 1 times [2021-11-09 10:52:12,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:52:12,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664339965] [2021-11-09 10:52:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:12,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:52:12,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:52:12,825 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:52:12,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-09 10:52:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:13,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:52:13,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:13,249 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 10:52:13,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:52:13,524 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-09 10:52:13,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-11-09 10:52:13,555 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 10:52:13,555 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:52:13,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664339965] [2021-11-09 10:52:13,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664339965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:13,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:13,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-09 10:52:13,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771503935] [2021-11-09 10:52:13,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:52:13,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:52:13,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:52:13,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:52:13,558 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 10:52:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:14,546 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2021-11-09 10:52:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:52:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2021-11-09 10:52:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:14,548 INFO L225 Difference]: With dead ends: 143 [2021-11-09 10:52:14,548 INFO L226 Difference]: Without dead ends: 143 [2021-11-09 10:52:14,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:52:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-09 10:52:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-11-09 10:52:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 97 states have internal predecessors, (105), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-09 10:52:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2021-11-09 10:52:14,556 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 22 [2021-11-09 10:52:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:14,556 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-11-09 10:52:14,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 10:52:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2021-11-09 10:52:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:52:14,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:14,558 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] [2021-11-09 10:52:14,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:14,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:52:14,759 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:52:14,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:14,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1141335565, now seen corresponding path program 1 times [2021-11-09 10:52:14,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:52:14,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680609754] [2021-11-09 10:52:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:14,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:52:14,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:52:14,763 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:52:14,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-09 10:52:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:15,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:52:15,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:15,315 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 10:52:15,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:52:15,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-11-09 10:52:15,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:52:15,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2021-11-09 10:52:16,126 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 10:52:16,127 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:52:16,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680609754] [2021-11-09 10:52:16,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680609754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:16,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:16,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-09 10:52:16,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464267138] [2021-11-09 10:52:16,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:52:16,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:52:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:52:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:52:16,129 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:52:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:16,919 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-11-09 10:52:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:52:16,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2021-11-09 10:52:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:16,922 INFO L225 Difference]: With dead ends: 106 [2021-11-09 10:52:16,922 INFO L226 Difference]: Without dead ends: 106 [2021-11-09 10:52:16,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:52:16,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-09 10:52:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-09 10:52:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 92 states have internal predecessors, (99), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-09 10:52:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2021-11-09 10:52:16,929 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 22 [2021-11-09 10:52:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:16,929 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2021-11-09 10:52:16,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 10:52:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2021-11-09 10:52:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:52:16,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:16,931 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] [2021-11-09 10:52:16,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:17,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:52:17,143 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr7REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:52:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:17,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1154047171, now seen corresponding path program 1 times [2021-11-09 10:52:17,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:52:17,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164881369] [2021-11-09 10:52:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:17,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:52:17,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:52:17,146 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:52:17,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-09 10:52:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 10:52:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:17,997 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:52:17,997 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 30 treesize of output 32 [2021-11-09 10:52:18,018 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:52:18,018 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 29 treesize of output 29 [2021-11-09 10:52:18,189 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 10:52:18,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:52:25,843 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~pointerToList.offset_BEFORE_CALL_6 (_ BitVec 32)) (v_append_~pointerToList.base_BEFORE_CALL_8 (_ BitVec 32))) (or (exists ((v_create_data_~data~0.base_23 (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (or (not (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| v_create_data_~data~0.base_23 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_23)))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (and (bvule .cse1 (select |c_#length| v_append_~pointerToList.base_BEFORE_CALL_8)) (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse1))))) is different from false [2021-11-09 10:52:30,748 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~pointerToList.offset_BEFORE_CALL_6 (_ BitVec 32)) (v_create_data_~data~0.base_24 (_ BitVec 32)) (v_append_~pointerToList.base_BEFORE_CALL_8 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_create_data_~data~0.base_24)))) (exists ((v_create_data_~data~0.base_23 (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (or (not (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| v_create_data_~data~0.base_23 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_23)))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (and (bvule .cse1 (select (store |c_#length| v_create_data_~data~0.base_24 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8)) (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse1))))) is different from false [2021-11-09 10:52:32,767 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_append_~pointerToList.offset_BEFORE_CALL_6 (_ BitVec 32)) (v_create_data_~data~0.base_24 (_ BitVec 32)) (v_append_~pointerToList.base_BEFORE_CALL_8 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_create_data_~data~0.base_24)))) (exists ((v_create_data_~data~0.base_23 (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (or (not (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| v_create_data_~data~0.base_23 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8))))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_create_data_~data~0.base_23)))))) (let ((.cse1 (bvadd (_ bv4 32) v_append_~pointerToList.offset_BEFORE_CALL_6))) (and (bvule .cse1 (select (store |c_#length| v_create_data_~data~0.base_24 (_ bv8 32)) v_append_~pointerToList.base_BEFORE_CALL_8)) (bvule v_append_~pointerToList.offset_BEFORE_CALL_6 .cse1))))) is different from true [2021-11-09 10:52:32,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 52 treesize of output 48 [2021-11-09 10:52:32,912 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-09 10:52:32,912 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 48 treesize of output 47 [2021-11-09 10:52:33,184 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 10:52:33,184 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:52:33,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164881369] [2021-11-09 10:52:33,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164881369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:33,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:33,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-09 10:52:33,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495825775] [2021-11-09 10:52:33,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 10:52:33,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:52:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 10:52:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=144, Unknown=5, NotChecked=50, Total=240 [2021-11-09 10:52:33,187 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 10:52:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:43,644 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-11-09 10:52:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:52:43,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-11-09 10:52:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:43,646 INFO L225 Difference]: With dead ends: 118 [2021-11-09 10:52:43,647 INFO L226 Difference]: Without dead ends: 118 [2021-11-09 10:52:43,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=106, Invalid=317, Unknown=5, NotChecked=78, Total=506 [2021-11-09 10:52:43,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-09 10:52:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-11-09 10:52:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 90 states have internal predecessors, (97), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-09 10:52:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2021-11-09 10:52:43,653 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 22 [2021-11-09 10:52:43,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:43,654 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2021-11-09 10:52:43,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 10:52:43,654 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2021-11-09 10:52:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 10:52:43,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:43,655 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:43,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:43,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:52:43,869 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr1REQUIRES_VIOLATION === [freeDataErr0REQUIRES_VIOLATION, freeDataErr1REQUIRES_VIOLATION, freeDataErr2REQUIRES_VIOLATION, freeDataErr3REQUIRES_VIOLATION (and 42 more)] === [2021-11-09 10:52:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:43,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1606693903, now seen corresponding path program 1 times [2021-11-09 10:52:43,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:52:43,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896945732] [2021-11-09 10:52:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:43,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:52:43,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:52:43,871 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:52:43,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-09 10:52:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:44,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:52:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:44,753 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:52:44,753 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 29 treesize of output 31 [2021-11-09 10:52:44,772 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:52:44,772 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 28 treesize of output 28 [2021-11-09 10:52:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:44,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:52:49,332 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_26 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |c_main_~#list~0.offset|))) (and (bvule |c_main_~#list~0.offset| .cse0) (bvule .cse0 (select (store |c_#length| v_append_~node~0.base_26 (_ bv8 32)) |c_main_~#list~0.base|)))) (not (= (_ bv0 1) (select |c_#valid| v_append_~node~0.base_26))))) is different from false [2021-11-09 10:52:49,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 55 treesize of output 51 [2021-11-09 10:52:49,619 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-09 10:52:49,619 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 51 treesize of output 50 [2021-11-09 10:52:50,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:52:50,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2021-11-09 10:52:50,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:52:50,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896945732] [2021-11-09 10:52:50,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [v_append_~node~0.base_26] [2021-11-09 10:52:50,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1691203027] [2021-11-09 10:52:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:50,854 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-09 10:52:50,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/cvc4 [2021-11-09 10:52:50,856 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-09 10:52:50,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-09 10:52:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:51,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 10:52:51,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:51,373 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 10:52:51,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-11-09 10:52:52,097 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:52:52,098 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 15 treesize of output 17 [2021-11-09 10:52:52,445 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 10:52:52,445 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 3 case distinctions, treesize of input 26 treesize of output 31 [2021-11-09 10:52:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:52,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:52:53,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [v_append_~node~0.base_31] [2021-11-09 10:52:53,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438349597] [2021-11-09 10:52:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:53,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:53,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:53,804 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:53,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 10:52:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:52:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:54,510 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:52:54,511 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 31 treesize of output 33 [2021-11-09 10:52:54,524 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:52:54,524 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 30 treesize of output 30 [2021-11-09 10:52:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:54,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:52:55,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 54 treesize of output 50 [2021-11-09 10:52:55,060 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-09 10:52:55,060 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 50 treesize of output 49 [2021-11-09 10:52:55,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [v_append_~node~0.base_26] [2021-11-09 10:52:55,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:55,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-09 10:52:55,300 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-11-09 10:52:55,300 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-09 10:52:55,308 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION [2021-11-09 10:52:55,310 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr0REQUIRES_VIOLATION [2021-11-09 10:52:55,311 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr1REQUIRES_VIOLATION [2021-11-09 10:52:55,311 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr2REQUIRES_VIOLATION [2021-11-09 10:52:55,311 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr3REQUIRES_VIOLATION [2021-11-09 10:52:55,311 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr4ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:52:55,311 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr5ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:52:55,311 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr6ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:52:55,312 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr7ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:52:55,312 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr8ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:52:55,312 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freeDataErr9ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:52:55,312 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr0REQUIRES_VIOLATION [2021-11-09 10:52:55,313 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr1REQUIRES_VIOLATION [2021-11-09 10:52:55,313 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr2REQUIRES_VIOLATION [2021-11-09 10:52:55,313 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr3REQUIRES_VIOLATION [2021-11-09 10:52:55,313 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr4REQUIRES_VIOLATION [2021-11-09 10:52:55,313 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr5REQUIRES_VIOLATION [2021-11-09 10:52:55,314 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr6REQUIRES_VIOLATION [2021-11-09 10:52:55,314 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr7REQUIRES_VIOLATION [2021-11-09 10:52:55,314 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr8REQUIRES_VIOLATION [2021-11-09 10:52:55,314 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_dataErr9REQUIRES_VIOLATION [2021-11-09 10:52:55,314 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-09 10:52:55,315 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-09 10:52:55,315 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-11-09 10:52:55,316 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-11-09 10:52:55,316 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-11-09 10:52:55,316 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-11-09 10:52:55,316 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-11-09 10:52:55,316 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-11-09 10:52:55,317 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-11-09 10:52:55,317 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-11-09 10:52:55,317 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-11-09 10:52:55,317 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-11-09 10:52:55,317 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:52:55,318 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:52:55,318 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 10:52:55,318 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-11-09 10:52:55,318 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-11-09 10:52:55,318 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17ENSURES_VIOLATIONMEMORY_LEAK [2021-11-09 10:52:55,319 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION [2021-11-09 10:52:55,319 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION [2021-11-09 10:52:55,319 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION [2021-11-09 10:52:55,319 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION [2021-11-09 10:52:55,319 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION [2021-11-09 10:52:55,319 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION [2021-11-09 10:52:55,319 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION [2021-11-09 10:52:55,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:55,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-09 10:52:55,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:55,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:52:55,923 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:55,926 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 10:52:55,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 10:52:55 BoogieIcfgContainer [2021-11-09 10:52:55,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 10:52:55,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 10:52:55,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 10:52:55,937 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 10:52:55,938 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:32" (3/4) ... [2021-11-09 10:52:55,941 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-09 10:52:55,941 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 10:52:55,942 INFO L168 Benchmark]: Toolchain (without parser) took 145163.47 ms. Allocated memory was 71.3 MB in the beginning and 92.3 MB in the end (delta: 21.0 MB). Free memory was 51.2 MB in the beginning and 27.9 MB in the end (delta: 23.3 MB). Peak memory consumption was 44.2 MB. Max. memory is 16.1 GB. [2021-11-09 10:52:55,942 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 71.3 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:52:55,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 855.67 ms. Allocated memory is still 71.3 MB. Free memory was 51.0 MB in the beginning and 42.5 MB in the end (delta: 8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 10:52:55,943 INFO L168 Benchmark]: Boogie Preprocessor took 115.32 ms. Allocated memory is still 71.3 MB. Free memory was 42.2 MB in the beginning and 39.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:52:55,945 INFO L168 Benchmark]: RCFGBuilder took 1183.20 ms. Allocated memory is still 71.3 MB. Free memory was 39.2 MB in the beginning and 33.5 MB in the end (delta: 5.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2021-11-09 10:52:55,945 INFO L168 Benchmark]: TraceAbstraction took 142997.80 ms. Allocated memory was 71.3 MB in the beginning and 92.3 MB in the end (delta: 21.0 MB). Free memory was 32.8 MB in the beginning and 27.9 MB in the end (delta: 4.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB. [2021-11-09 10:52:55,945 INFO L168 Benchmark]: Witness Printer took 4.47 ms. Allocated memory is still 92.3 MB. Free memory is still 27.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:52:55,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 71.3 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 855.67 ms. Allocated memory is still 71.3 MB. Free memory was 51.0 MB in the beginning and 42.5 MB in the end (delta: 8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 115.32 ms. Allocated memory is still 71.3 MB. Free memory was 42.2 MB in the beginning and 39.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1183.20 ms. Allocated memory is still 71.3 MB. Free memory was 39.2 MB in the beginning and 33.5 MB in the end (delta: 5.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 142997.80 ms. Allocated memory was 71.3 MB in the beginning and 92.3 MB in the end (delta: 21.0 MB). Free memory was 32.8 MB in the beginning and 27.9 MB in the end (delta: 4.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.47 ms. Allocated memory is still 92.3 MB. Free memory is still 27.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L582] struct node_t *list = ((void *)0); [L583] int dataNotFinished = 0; [L585] CALL append(&list) [L576] struct node_t *node = malloc(sizeof *node); [L577] EXPR \read(**pointerToList) [L577] node->next = *pointerToList [L578] CALL, EXPR create_data() [L550] COND TRUE __VERIFIER_nondet_int() [L551] return ((void *)0); [L578] RET, EXPR create_data() [L578] node->data = create_data() [L579] *pointerToList = node [L585] RET append(&list) [L586] COND TRUE __VERIFIER_nondet_int() [L585] CALL append(&list) [L576] struct node_t *node = malloc(sizeof *node); [L577] \read(**pointerToList) - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 125 locations, 46 error locations. Started 1 CEGAR loops. OverallTime: 142.9s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 77.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1446 SDtfs, 855 SDslu, 2914 SDs, 0 SdLazy, 3274 SolverSat, 152 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 49.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 553 GetRequests, 425 SyntacticMatches, 16 SemanticMatches, 112 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 57.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=15, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 162 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 51.8s InterpolantComputationTime, 292 NumberOfCodeBlocks, 292 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 525 ConstructedInterpolants, 59 QuantifiedInterpolants, 3819 SizeOfPredicates, 49 NumberOfNonLiveVariables, 2038 ConjunctsInSsa, 125 ConjunctsInUnsatCore, 35 InterpolantComputations, 34 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-09 10:52:56,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4222575-e633-4197-a1b5-d51e25dda4ad/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN