./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array03-alloca-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_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/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_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/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_9b558d42-1d84-45d3-af08-681f637795dd/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 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:18:37,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:18:37,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:18:37,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:18:37,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:18:37,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:18:37,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:18:37,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:18:37,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:18:37,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:18:37,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:18:37,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:18:37,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:18:37,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:18:37,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:18:37,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:18:37,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:18:37,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:18:37,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:18:37,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:18:37,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:18:37,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:18:37,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:18:37,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:18:37,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:18:37,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:18:37,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:18:37,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:18:38,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:18:38,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:18:38,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:18:38,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:18:38,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:18:38,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:18:38,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:18:38,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:18:38,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:18:38,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:18:38,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:18:38,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:18:38,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:18:38,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 09:18:38,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:18:38,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:18:38,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:18:38,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:18:38,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:18:38,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:18:38,083 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:18:38,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:18:38,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:18:38,084 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:18:38,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:18:38,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:18:38,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:18:38,086 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:18:38,087 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:18:38,087 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:18:38,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:18:38,087 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:18:38,087 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:18:38,088 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:18:38,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:18:38,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:18:38,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:18:38,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:38,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:18:38,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:18:38,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:18:38,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:18:38,090 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:18:38,092 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_9b558d42-1d84-45d3-af08-681f637795dd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2021-11-09 09:18:38,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:18:38,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:18:38,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:18:38,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:18:38,480 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:18:38,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-09 09:18:38,553 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/data/250395311/dd5b85c574044b6abf72236dfd289e5d/FLAG36e6aa3e2 [2021-11-09 09:18:39,233 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:18:39,234 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-09 09:18:39,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/data/250395311/dd5b85c574044b6abf72236dfd289e5d/FLAG36e6aa3e2 [2021-11-09 09:18:39,489 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/data/250395311/dd5b85c574044b6abf72236dfd289e5d [2021-11-09 09:18:39,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:18:39,494 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:18:39,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:39,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:18:39,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:18:39,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:39" (1/1) ... [2021-11-09 09:18:39,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6acd6386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:39, skipping insertion in model container [2021-11-09 09:18:39,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:39" (1/1) ... [2021-11-09 09:18:39,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:18:39,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:18:39,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:39,955 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 09:18:39,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6cf6f3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:39, skipping insertion in model container [2021-11-09 09:18:39,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:39,957 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-09 09:18:39,960 INFO L168 Benchmark]: Toolchain (without parser) took 465.47 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 45.6 MB in the beginning and 76.2 MB in the end (delta: -30.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-11-09 09:18:39,962 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 86.0 MB. Free memory was 63.6 MB in the beginning and 63.6 MB in the end (delta: 42.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:18:39,964 INFO L168 Benchmark]: CACSL2BoogieTranslator took 452.06 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 45.4 MB in the beginning and 76.2 MB in the end (delta: -30.8 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-11-09 09:18:39,967 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 86.0 MB. Free memory was 63.6 MB in the beginning and 63.6 MB in the end (delta: 42.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 452.06 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 45.4 MB in the beginning and 76.2 MB in the end (delta: -30.8 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 535]: 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_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/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_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/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_9b558d42-1d84-45d3-af08-681f637795dd/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 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:18:42,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:18:42,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:18:42,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:18:42,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:18:42,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:18:42,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:18:42,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:18:42,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:18:42,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:18:42,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:18:42,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:18:42,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:18:42,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:18:42,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:18:42,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:18:42,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:18:42,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:18:42,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:18:42,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:18:42,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:18:42,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:18:42,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:18:42,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:18:42,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:18:42,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:18:42,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:18:42,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:18:42,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:18:42,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:18:42,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:18:42,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:18:42,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:18:42,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:18:42,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:18:42,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:18:42,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:18:42,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:18:42,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:18:42,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:18:42,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:18:42,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-09 09:18:42,643 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:18:42,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:18:42,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:18:42,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:18:42,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:18:42,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:18:42,647 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:18:42,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:18:42,647 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:18:42,648 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:18:42,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:18:42,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:18:42,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:18:42,649 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:18:42,649 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:18:42,650 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:18:42,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:18:42,650 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:18:42,650 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 09:18:42,651 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 09:18:42,651 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:18:42,651 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:18:42,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:18:42,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:18:42,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:18:42,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:42,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:18:42,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:18:42,653 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 09:18:42,653 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 09:18:42,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:18:42,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 09:18:42,654 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_9b558d42-1d84-45d3-af08-681f637795dd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2021-11-09 09:18:43,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:18:43,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:18:43,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:18:43,144 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:18:43,145 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:18:43,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-09 09:18:43,220 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/data/5d4e63bc3/9dae27caed154be79fd89029dfc492ef/FLAG331319af5 [2021-11-09 09:18:43,918 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:18:43,919 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-09 09:18:43,948 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/data/5d4e63bc3/9dae27caed154be79fd89029dfc492ef/FLAG331319af5 [2021-11-09 09:18:44,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/data/5d4e63bc3/9dae27caed154be79fd89029dfc492ef [2021-11-09 09:18:44,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:18:44,152 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:18:44,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:44,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:18:44,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:18:44,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:44" (1/1) ... [2021-11-09 09:18:44,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b701659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44, skipping insertion in model container [2021-11-09 09:18:44,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:44" (1/1) ... [2021-11-09 09:18:44,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:18:44,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:18:44,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:44,625 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-09 09:18:44,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:18:44,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:44,698 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:18:44,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:44,811 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:18:44,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44 WrapperNode [2021-11-09 09:18:44,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:44,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:18:44,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:18:44,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:18:44,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44" (1/1) ... [2021-11-09 09:18:44,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44" (1/1) ... [2021-11-09 09:18:44,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44" (1/1) ... [2021-11-09 09:18:44,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44" (1/1) ... [2021-11-09 09:18:44,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44" (1/1) ... [2021-11-09 09:18:44,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44" (1/1) ... [2021-11-09 09:18:44,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44" (1/1) ... [2021-11-09 09:18:44,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:18:44,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:18:44,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:18:44,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:18:44,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44" (1/1) ... [2021-11-09 09:18:44,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:44,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:44,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:18:44,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:18:45,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 09:18:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:18:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 09:18:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 09:18:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 09:18:45,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 09:18:45,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 09:18:45,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 09:18:45,033 INFO L138 BoogieDeclarations]: Found implementation of procedure test_fun [2021-11-09 09:18:45,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 09:18:45,034 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 09:18:45,034 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 09:18:45,034 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 09:18:45,034 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 09:18:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 09:18:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 09:18:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 09:18:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 09:18:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 09:18:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 09:18:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 09:18:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 09:18:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 09:18:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 09:18:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 09:18:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 09:18:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 09:18:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 09:18:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 09:18:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 09:18:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 09:18:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 09:18:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 09:18:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 09:18:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 09:18:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 09:18:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 09:18:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 09:18:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 09:18:45,039 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 09:18:45,039 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 09:18:45,039 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 09:18:45,039 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 09:18:45,040 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 09:18:45,040 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 09:18:45,040 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 09:18:45,040 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 09:18:45,041 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 09:18:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 09:18:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 09:18:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 09:18:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 09:18:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 09:18:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 09:18:45,043 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 09:18:45,043 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 09:18:45,043 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 09:18:45,043 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 09:18:45,044 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 09:18:45,044 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 09:18:45,045 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 09:18:45,045 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 09:18:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 09:18:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 09:18:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 09:18:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 09:18:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 09:18:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 09:18:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 09:18:45,049 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 09:18:45,049 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 09:18:45,049 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 09:18:45,049 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 09:18:45,049 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 09:18:45,049 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 09:18:45,050 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 09:18:45,050 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 09:18:45,050 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 09:18:45,050 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 09:18:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 09:18:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 09:18:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 09:18:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 09:18:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 09:18:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 09:18:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 09:18:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 09:18:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 09:18:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 09:18:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 09:18:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 09:18:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 09:18:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 09:18:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 09:18:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 09:18:45,054 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 09:18:45,054 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 09:18:45,054 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 09:18:45,054 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 09:18:45,054 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 09:18:45,055 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 09:18:45,055 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 09:18:45,055 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 09:18:45,055 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 09:18:45,055 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 09:18:45,056 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 09:18:45,056 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 09:18:45,056 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 09:18:45,056 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 09:18:45,056 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 09:18:45,056 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 09:18:45,056 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 09:18:45,057 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 09:18:45,057 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 09:18:45,057 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 09:18:45,057 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 09:18:45,057 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 09:18:45,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-09 09:18:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure test_fun [2021-11-09 09:18:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 09:18:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 09:18:45,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 09:18:45,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:18:45,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:18:45,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 09:18:45,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:18:45,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 09:18:46,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:18:46,006 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-09 09:18:46,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:18:46 BoogieIcfgContainer [2021-11-09 09:18:46,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:18:46,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:18:46,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:18:46,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:18:46,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:18:44" (1/3) ... [2021-11-09 09:18:46,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15462f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:18:46, skipping insertion in model container [2021-11-09 09:18:46,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:44" (2/3) ... [2021-11-09 09:18:46,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15462f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:18:46, skipping insertion in model container [2021-11-09 09:18:46,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:18:46" (3/3) ... [2021-11-09 09:18:46,031 INFO L111 eAbstractionObserver]: Analyzing ICFG array03-alloca-2.i [2021-11-09 09:18:46,037 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:18:46,038 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-11-09 09:18:46,105 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:18:46,115 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 09:18:46,116 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-11-09 09:18:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 29 states have (on average 1.896551724137931) internal successors, (55), 46 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:18:46,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:46,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:46,165 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:18:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1745891075, now seen corresponding path program 1 times [2021-11-09 09:18:46,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:18:46,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414690598] [2021-11-09 09:18:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:46,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:18:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:18:46,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:18:46,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 09:18:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:46,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:18:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:46,549 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 09:18:46,632 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 09:18:46,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:18:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:46,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:18:46,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414690598] [2021-11-09 09:18:46,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414690598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:46,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:46,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 09:18:46,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057022987] [2021-11-09 09:18:46,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:18:46,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:18:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:18:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:18:46,935 INFO L87 Difference]: Start difference. First operand has 53 states, 29 states have (on average 1.896551724137931) internal successors, (55), 46 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 09:18:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:47,702 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-11-09 09:18:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:18:47,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-09 09:18:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:47,713 INFO L225 Difference]: With dead ends: 78 [2021-11-09 09:18:47,714 INFO L226 Difference]: Without dead ends: 73 [2021-11-09 09:18:47,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:18:47,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-09 09:18:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2021-11-09 09:18:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.75) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:18:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-11-09 09:18:47,763 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 10 [2021-11-09 09:18:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:47,763 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-11-09 09:18:47,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 09:18:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-11-09 09:18:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:18:47,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:47,765 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:47,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:47,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:18:47,980 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:18:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:47,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1745891074, now seen corresponding path program 1 times [2021-11-09 09:18:47,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:18:47,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797524081] [2021-11-09 09:18:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:47,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:18:47,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:18:47,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:18:48,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 09:18:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:48,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:18:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:48,135 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 09:18:48,145 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 09:18:48,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:18:48,190 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 09:18:48,190 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:18:48,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797524081] [2021-11-09 09:18:48,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797524081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:48,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:48,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 09:18:48,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112472321] [2021-11-09 09:18:48,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:18:48,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:18:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:18:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:18:48,196 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 09:18:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:48,324 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-11-09 09:18:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:18:48,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-09 09:18:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:48,325 INFO L225 Difference]: With dead ends: 53 [2021-11-09 09:18:48,326 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 09:18:48,326 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 09:18:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 09:18:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-09 09:18:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.6875) internal successors, (54), 47 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:18:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-11-09 09:18:48,333 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 10 [2021-11-09 09:18:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:48,333 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-11-09 09:18:48,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 09:18:48,334 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-11-09 09:18:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:18:48,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:48,335 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:48,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:48,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:18:48,550 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting test_funErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:18:48,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:48,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1562637391, now seen corresponding path program 1 times [2021-11-09 09:18:48,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:18:48,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264386148] [2021-11-09 09:18:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:48,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:18:48,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:18:48,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:18:48,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 09:18:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:48,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:18:48,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:48,726 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 09:18:48,769 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 09:18:48,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:18:48,841 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 09:18:48,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:18:48,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264386148] [2021-11-09 09:18:48,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264386148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:48,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:48,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 09:18:48,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051176792] [2021-11-09 09:18:48,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:18:48,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:18:48,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:18:48,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:18:48,850 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 09:18:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:49,118 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-11-09 09:18:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:18:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2021-11-09 09:18:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:49,120 INFO L225 Difference]: With dead ends: 46 [2021-11-09 09:18:49,121 INFO L226 Difference]: Without dead ends: 46 [2021-11-09 09:18:49,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:18:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-09 09:18:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-09 09:18:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.46875) internal successors, (47), 40 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:18:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-09 09:18:49,126 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 13 [2021-11-09 09:18:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:49,127 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-09 09:18:49,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 09:18:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-09 09:18:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:18:49,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:49,128 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:49,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:49,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:18:49,329 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting test_funErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:18:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1562637392, now seen corresponding path program 1 times [2021-11-09 09:18:49,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:18:49,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699608970] [2021-11-09 09:18:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:49,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:18:49,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:18:49,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:18:49,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 09:18:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:18:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:49,524 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 17 treesize of output 16 [2021-11-09 09:18:49,779 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 09:18:49,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:18:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:50,222 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:18:50,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699608970] [2021-11-09 09:18:50,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699608970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:50,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:50,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-09 09:18:50,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974388672] [2021-11-09 09:18:50,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:18:50,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:18:50,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:18:50,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:18:50,225 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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 09:18:50,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:50,923 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-09 09:18:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:18:50,923 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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 13 [2021-11-09 09:18:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:50,926 INFO L225 Difference]: With dead ends: 57 [2021-11-09 09:18:50,926 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 09:18:50,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:18:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 09:18:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2021-11-09 09:18:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:18:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-11-09 09:18:50,932 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 13 [2021-11-09 09:18:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:50,933 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-11-09 09:18:50,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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 09:18:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-11-09 09:18:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:18:50,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:50,935 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:50,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:51,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:18:51,139 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:18:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:51,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1988481478, now seen corresponding path program 1 times [2021-11-09 09:18:51,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:18:51,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986237037] [2021-11-09 09:18:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:51,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:18:51,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:18:51,143 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:18:51,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 09:18:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:51,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:18:51,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:51,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:18:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:51,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:18:51,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986237037] [2021-11-09 09:18:51,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986237037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:18:51,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:51,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 09:18:51,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526989724] [2021-11-09 09:18:51,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:18:51,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:18:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:18:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:51,476 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 09:18:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:51,562 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-11-09 09:18:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:51,562 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 14 [2021-11-09 09:18:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:51,565 INFO L225 Difference]: With dead ends: 50 [2021-11-09 09:18:51,566 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 09:18:51,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 09:18:51,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-09 09:18:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:18:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-09 09:18:51,573 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 14 [2021-11-09 09:18:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:51,573 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-09 09:18:51,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 09:18:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-09 09:18:51,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:18:51,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:51,575 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:51,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:51,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:18:51,788 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:18:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1179134852, now seen corresponding path program 1 times [2021-11-09 09:18:51,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:18:51,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136546650] [2021-11-09 09:18:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:51,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:18:51,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:18:51,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:18:51,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 09:18:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:51,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:18:51,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:51,973 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 8 treesize of output 7 [2021-11-09 09:18:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:52,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:18:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:52,821 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:18:52,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136546650] [2021-11-09 09:18:52,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136546650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:18:52,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:52,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-09 09:18:52,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173573929] [2021-11-09 09:18:52,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:18:52,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:18:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:18:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:18:52,824 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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 09:18:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:53,848 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-11-09 09:18:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:18:53,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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 14 [2021-11-09 09:18:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:53,853 INFO L225 Difference]: With dead ends: 66 [2021-11-09 09:18:53,853 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 09:18:53,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:18:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 09:18:53,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-11-09 09:18:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.24) internal successors, (62), 52 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:18:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-11-09 09:18:53,864 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 14 [2021-11-09 09:18:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:53,866 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-11-09 09:18:53,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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 09:18:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-11-09 09:18:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:18:53,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:53,870 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 09:18:53,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:54,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:18:54,071 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr2ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:18:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1844950364, now seen corresponding path program 1 times [2021-11-09 09:18:54,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:18:54,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654097847] [2021-11-09 09:18:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:54,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:18:54,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:18:54,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:18:54,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 09:18:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:54,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:18:54,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:54,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:18:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:54,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:18:54,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654097847] [2021-11-09 09:18:54,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654097847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:54,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:54,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-09 09:18:54,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586543941] [2021-11-09 09:18:54,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:18:54,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:18:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:18:54,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:18:54,473 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:54,666 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-11-09 09:18:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:18:54,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2021-11-09 09:18:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:54,668 INFO L225 Difference]: With dead ends: 77 [2021-11-09 09:18:54,668 INFO L226 Difference]: Without dead ends: 75 [2021-11-09 09:18:54,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-09 09:18:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-11-09 09:18:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:18:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-11-09 09:18:54,674 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 20 [2021-11-09 09:18:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:54,675 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-11-09 09:18:54,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-11-09 09:18:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:18:54,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:54,677 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:54,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:54,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:18:54,899 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting test_funErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:18:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:54,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1770810992, now seen corresponding path program 1 times [2021-11-09 09:18:54,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:18:54,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115167135] [2021-11-09 09:18:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:54,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:18:54,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:18:54,902 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:18:54,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 09:18:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:55,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:18:55,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:55,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:18:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:55,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:18:55,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115167135] [2021-11-09 09:18:55,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115167135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:18:55,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:55,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 09:18:55,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602364753] [2021-11-09 09:18:55,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:18:55,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:18:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:18:55,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:18:55,407 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 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 09:18:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:55,674 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2021-11-09 09:18:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:18:55,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 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 24 [2021-11-09 09:18:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:55,676 INFO L225 Difference]: With dead ends: 81 [2021-11-09 09:18:55,676 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 09:18:55,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:18:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 09:18:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-11-09 09:18:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 71 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2021-11-09 09:18:55,684 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 24 [2021-11-09 09:18:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:55,684 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2021-11-09 09:18:55,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 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 09:18:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2021-11-09 09:18:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:18:55,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:55,686 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:55,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:18:55,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:18:55,899 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting test_funErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:18:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:55,899 INFO L85 PathProgramCache]: Analyzing trace with hash 530011598, now seen corresponding path program 1 times [2021-11-09 09:18:55,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:18:55,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824956163] [2021-11-09 09:18:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:55,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:18:55,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:18:55,904 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:18:55,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 09:18:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:56,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:18:56,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:18:56,144 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 8 treesize of output 7 [2021-11-09 09:18:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:56,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:18:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:18:58,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:18:58,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824956163] [2021-11-09 09:18:58,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824956163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:18:58,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:18:58,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-09 09:18:58,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310808031] [2021-11-09 09:18:58,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:18:58,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:18:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:18:58,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:18:58,086 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 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 09:18:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:59,909 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2021-11-09 09:18:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:18:59,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 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 24 [2021-11-09 09:18:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:59,912 INFO L225 Difference]: With dead ends: 127 [2021-11-09 09:18:59,912 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 09:18:59,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:18:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 09:18:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2021-11-09 09:18:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 113 states have (on average 1.2300884955752212) internal successors, (139), 116 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:18:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2021-11-09 09:18:59,925 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 24 [2021-11-09 09:18:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:59,926 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2021-11-09 09:18:59,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 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 09:18:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2021-11-09 09:18:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:18:59,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:59,928 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:59,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:00,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:19:00,135 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr2ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:19:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:00,135 INFO L85 PathProgramCache]: Analyzing trace with hash 852771615, now seen corresponding path program 1 times [2021-11-09 09:19:00,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:19:00,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499018792] [2021-11-09 09:19:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:00,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:19:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:19:00,136 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:19:00,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-09 09:19:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:19:00,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:00,384 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 09:19:00,573 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-11-09 09:19:00,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2021-11-09 09:19:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:19:00,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:19:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:19:03,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:19:03,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499018792] [2021-11-09 09:19:03,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499018792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:03,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:03,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-11-09 09:19:03,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657513683] [2021-11-09 09:19:03,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:19:03,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:19:03,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:19:03,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2021-11-09 09:19:03,165 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:19:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:03,506 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2021-11-09 09:19:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:19:03,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-11-09 09:19:03,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:03,508 INFO L225 Difference]: With dead ends: 122 [2021-11-09 09:19:03,508 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 09:19:03,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=34, Invalid=75, Unknown=1, NotChecked=0, Total=110 [2021-11-09 09:19:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 09:19:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-09 09:19:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 87 states have internal predecessors, (104), 3 states have call successors, (3), 3 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 09:19:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2021-11-09 09:19:03,515 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 27 [2021-11-09 09:19:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:03,516 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2021-11-09 09:19:03,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:19:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2021-11-09 09:19:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:19:03,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:03,518 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:03,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:03,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:19:03,731 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:19:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:03,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1374761523, now seen corresponding path program 2 times [2021-11-09 09:19:03,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:19:03,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158371513] [2021-11-09 09:19:03,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:03,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:19:03,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:19:03,734 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:19:03,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-09 09:19:04,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:04,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:04,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:19:04,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:04,095 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 8 treesize of output 7 [2021-11-09 09:19:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:04,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:19:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:07,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:19:07,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158371513] [2021-11-09 09:19:07,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158371513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:19:07,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:07,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-09 09:19:07,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978195689] [2021-11-09 09:19:07,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:19:07,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:19:07,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:19:07,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:19:07,053 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:12,523 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2021-11-09 09:19:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:19:12,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-09 09:19:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:12,525 INFO L225 Difference]: With dead ends: 124 [2021-11-09 09:19:12,525 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 09:19:12,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=327, Invalid=665, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:19:12,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 09:19:12,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2021-11-09 09:19:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.2181818181818183) internal successors, (134), 111 states have internal predecessors, (134), 3 states have call successors, (3), 3 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 09:19:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-11-09 09:19:12,532 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 26 [2021-11-09 09:19:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:12,532 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-11-09 09:19:12,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:19:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-11-09 09:19:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:19:12,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:12,535 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:12,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:12,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:19:12,756 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting test_funErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:19:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1774792557, now seen corresponding path program 2 times [2021-11-09 09:19:12,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:19:12,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712829163] [2021-11-09 09:19:12,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:12,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:19:12,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:19:12,758 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:19:12,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-09 09:19:13,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:13,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:13,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:19:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:13,129 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 8 treesize of output 7 [2021-11-09 09:19:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:14,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:19:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:17,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:19:17,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712829163] [2021-11-09 09:19:17,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712829163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:19:17,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:17,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-11-09 09:19:17,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040291489] [2021-11-09 09:19:17,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:19:17,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:19:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:19:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:19:17,930 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 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 09:19:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:25,955 INFO L93 Difference]: Finished difference Result 215 states and 254 transitions. [2021-11-09 09:19:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:19:25,957 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 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 45 [2021-11-09 09:19:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:25,959 INFO L225 Difference]: With dead ends: 215 [2021-11-09 09:19:25,959 INFO L226 Difference]: Without dead ends: 196 [2021-11-09 09:19:25,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:19:25,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-09 09:19:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 133. [2021-11-09 09:19:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 127 states have internal predecessors, (152), 4 states have call successors, (4), 4 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 09:19:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2021-11-09 09:19:25,967 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 45 [2021-11-09 09:19:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:25,968 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2021-11-09 09:19:25,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 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 09:19:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2021-11-09 09:19:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:19:25,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:25,971 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:25,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:26,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:19:26,183 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:19:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:26,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1030364705, now seen corresponding path program 3 times [2021-11-09 09:19:26,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:19:26,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191618915] [2021-11-09 09:19:26,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:26,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:19:26,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:19:26,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:19:26,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-09 09:19:26,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-09 09:19:26,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:26,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:19:26,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:26,845 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 8 treesize of output 7 [2021-11-09 09:19:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:28,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:19:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:34,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:19:34,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191618915] [2021-11-09 09:19:34,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191618915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:19:34,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:34,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-11-09 09:19:34,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899571516] [2021-11-09 09:19:34,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:19:34,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:19:34,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:19:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:19:34,845 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand has 30 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 30 states have internal predecessors, (91), 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 09:19:45,020 WARN L207 SmtUtils]: Spent 5.72 s on a formula simplification that was a NOOP. DAG size: 138 [2021-11-09 09:19:56,538 WARN L207 SmtUtils]: Spent 11.15 s on a formula simplification. DAG size of input: 134 DAG size of output: 125 [2021-11-09 09:20:04,073 WARN L207 SmtUtils]: Spent 5.98 s on a formula simplification that was a NOOP. DAG size: 128 [2021-11-09 09:20:12,663 WARN L207 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 122 DAG size of output: 114 [2021-11-09 09:20:23,780 WARN L207 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 110 DAG size of output: 103 [2021-11-09 09:20:53,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:53,645 INFO L93 Difference]: Finished difference Result 199 states and 235 transitions. [2021-11-09 09:20:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 09:20:53,647 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 30 states have internal predecessors, (91), 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 50 [2021-11-09 09:20:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:53,649 INFO L225 Difference]: With dead ends: 199 [2021-11-09 09:20:53,650 INFO L226 Difference]: Without dead ends: 199 [2021-11-09 09:20:53,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 76.5s TimeCoverageRelationStatistics Valid=1212, Invalid=2570, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 09:20:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-09 09:20:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 181. [2021-11-09 09:20:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 174 states have (on average 1.2183908045977012) internal successors, (212), 175 states have internal predecessors, (212), 4 states have call successors, (4), 4 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 09:20:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 217 transitions. [2021-11-09 09:20:53,662 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 217 transitions. Word has length 50 [2021-11-09 09:20:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:53,663 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 217 transitions. [2021-11-09 09:20:53,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 30 states have internal predecessors, (91), 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 09:20:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 217 transitions. [2021-11-09 09:20:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 09:20:53,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:53,667 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:53,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:53,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:20:53,883 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting test_funErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:20:53,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:53,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1513946095, now seen corresponding path program 3 times [2021-11-09 09:20:53,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:20:53,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682747347] [2021-11-09 09:20:53,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:20:53,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:20:53,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:20:53,885 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:20:53,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-09 09:20:54,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:20:54,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:20:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:54,581 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 8 treesize of output 7 [2021-11-09 09:20:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 09:20:57,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:21:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 09:21:34,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:21:34,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682747347] [2021-11-09 09:21:34,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682747347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:21:34,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:34,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-11-09 09:21:34,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968792963] [2021-11-09 09:21:34,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:21:34,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:21:34,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:21:34,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=645, Unknown=4, NotChecked=0, Total=756 [2021-11-09 09:21:34,519 INFO L87 Difference]: Start difference. First operand 181 states and 217 transitions. Second operand has 28 states, 25 states have (on average 3.24) internal successors, (81), 26 states have internal predecessors, (81), 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 09:21:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:43,634 INFO L93 Difference]: Finished difference Result 215 states and 256 transitions. [2021-11-09 09:21:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:21:43,636 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.24) internal successors, (81), 26 states have internal predecessors, (81), 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 56 [2021-11-09 09:21:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:43,637 INFO L225 Difference]: With dead ends: 215 [2021-11-09 09:21:43,637 INFO L226 Difference]: Without dead ends: 181 [2021-11-09 09:21:43,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=164, Invalid=888, Unknown=4, NotChecked=0, Total=1056 [2021-11-09 09:21:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-09 09:21:43,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-09 09:21:43,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 174 states have (on average 1.2126436781609196) internal successors, (211), 175 states have internal predecessors, (211), 4 states have call successors, (4), 4 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 09:21:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2021-11-09 09:21:43,646 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 56 [2021-11-09 09:21:43,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:43,647 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2021-11-09 09:21:43,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.24) internal successors, (81), 26 states have internal predecessors, (81), 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 09:21:43,647 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2021-11-09 09:21:43,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 09:21:43,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:43,649 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:43,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:43,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:21:43,855 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting test_funErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:21:43,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:43,855 INFO L85 PathProgramCache]: Analyzing trace with hash -412056572, now seen corresponding path program 4 times [2021-11-09 09:21:43,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:21:43,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972842486] [2021-11-09 09:21:43,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:21:43,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:21:43,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:21:43,858 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:21:43,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-09 09:21:44,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:21:44,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:44,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:21:44,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:44,604 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 8 treesize of output 7 [2021-11-09 09:21:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 09:21:46,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:21:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 09:21:52,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:21:52,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972842486] [2021-11-09 09:21:52,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972842486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:21:52,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:52,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-09 09:21:52,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140018507] [2021-11-09 09:21:52,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:21:52,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:21:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:21:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:21:52,288 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 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 09:22:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:22:05,028 INFO L93 Difference]: Finished difference Result 318 states and 380 transitions. [2021-11-09 09:22:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:22:05,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 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 57 [2021-11-09 09:22:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:22:05,033 INFO L225 Difference]: With dead ends: 318 [2021-11-09 09:22:05,033 INFO L226 Difference]: Without dead ends: 318 [2021-11-09 09:22:05,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=400, Invalid=1322, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:22:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-09 09:22:05,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 254. [2021-11-09 09:22:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 248 states have (on average 1.2096774193548387) internal successors, (300), 249 states have internal predecessors, (300), 3 states have call successors, (3), 3 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 09:22:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2021-11-09 09:22:05,052 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 57 [2021-11-09 09:22:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:22:05,052 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2021-11-09 09:22:05,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 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 09:22:05,053 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2021-11-09 09:22:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-09 09:22:05,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:22:05,055 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:22:05,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:22:05,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:22:05,263 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting test_funErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:22:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:22:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash -757834297, now seen corresponding path program 5 times [2021-11-09 09:22:05,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:22:05,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990626138] [2021-11-09 09:22:05,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:22:05,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:22:05,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:22:05,266 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:22:05,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-09 09:22:06,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-09 09:22:06,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:22:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:22:06,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:22:06,651 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 8 treesize of output 7 [2021-11-09 09:22:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 133 proven. 204 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 09:22:10,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:22:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:22:24,934 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:22:24,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990626138] [2021-11-09 09:22:24,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990626138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:22:24,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:22:24,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 36 [2021-11-09 09:22:24,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353404801] [2021-11-09 09:22:24,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 09:22:24,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:22:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 09:22:24,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:22:24,937 INFO L87 Difference]: Start difference. First operand 254 states and 304 transitions. Second operand has 36 states, 34 states have (on average 5.0) internal successors, (170), 34 states have internal predecessors, (170), 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 09:23:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:18,254 INFO L93 Difference]: Finished difference Result 473 states and 564 transitions. [2021-11-09 09:23:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 09:23:18,256 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 5.0) internal successors, (170), 34 states have internal predecessors, (170), 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 95 [2021-11-09 09:23:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:18,259 INFO L225 Difference]: With dead ends: 473 [2021-11-09 09:23:18,260 INFO L226 Difference]: Without dead ends: 424 [2021-11-09 09:23:18,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=505, Invalid=4325, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:23:18,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-09 09:23:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 271. [2021-11-09 09:23:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 264 states have (on average 1.2045454545454546) internal successors, (318), 265 states have internal predecessors, (318), 4 states have call successors, (4), 4 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 09:23:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 323 transitions. [2021-11-09 09:23:18,275 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 323 transitions. Word has length 95 [2021-11-09 09:23:18,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:18,276 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 323 transitions. [2021-11-09 09:23:18,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 5.0) internal successors, (170), 34 states have internal predecessors, (170), 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 09:23:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 323 transitions. [2021-11-09 09:23:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:23:18,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:18,279 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:23:18,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:18,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:23:18,495 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, test_funErr0REQUIRES_VIOLATION (and 13 more)] === [2021-11-09 09:23:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:18,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2050865149, now seen corresponding path program 4 times [2021-11-09 09:23:18,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:23:18,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183745591] [2021-11-09 09:23:18,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:23:18,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:23:18,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:23:18,497 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:23:18,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b558d42-1d84-45d3-af08-681f637795dd/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-09 09:23:19,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:23:19,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:19,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 09:23:19,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:19,602 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 8 treesize of output 7 [2021-11-09 09:23:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:23:25,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:23:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:23:49,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:23:49,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183745591] [2021-11-09 09:23:49,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183745591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:23:49,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:49,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2021-11-09 09:23:49,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113283889] [2021-11-09 09:23:49,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 09:23:49,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:23:49,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 09:23:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=2452, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:23:49,338 INFO L87 Difference]: Start difference. First operand 271 states and 323 transitions. Second operand has 58 states, 57 states have (on average 3.280701754385965) internal successors, (187), 58 states have internal predecessors, (187), 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 09:24:43,824 WARN L207 SmtUtils]: Spent 33.08 s on a formula simplification that was a NOOP. DAG size: 256 [2021-11-09 09:26:07,939 WARN L207 SmtUtils]: Spent 1.37 m on a formula simplification. DAG size of input: 252 DAG size of output: 252 [2021-11-09 09:26:53,003 WARN L207 SmtUtils]: Spent 38.20 s on a formula simplification that was a NOOP. DAG size: 246 [2021-11-09 09:28:01,162 WARN L207 SmtUtils]: Spent 1.06 m on a formula simplification. DAG size of input: 241 DAG size of output: 241 [2021-11-09 09:28:36,060 WARN L207 SmtUtils]: Spent 27.61 s on a formula simplification that was a NOOP. DAG size: 235 [2021-11-09 09:29:39,020 WARN L207 SmtUtils]: Spent 1.01 m on a formula simplification. DAG size of input: 230 DAG size of output: 230 [2021-11-09 09:30:14,515 WARN L207 SmtUtils]: Spent 28.77 s on a formula simplification that was a NOOP. DAG size: 225 [2021-11-09 09:31:11,087 WARN L207 SmtUtils]: Spent 53.70 s on a formula simplification. DAG size of input: 220 DAG size of output: 220 [2021-11-09 09:31:40,286 WARN L207 SmtUtils]: Spent 22.64 s on a formula simplification that was a NOOP. DAG size: 214 [2021-11-09 09:32:34,234 WARN L207 SmtUtils]: Spent 50.84 s on a formula simplification. DAG size of input: 209 DAG size of output: 209