./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be --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 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:37:50,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:37:50,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:37:50,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:37:50,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:37:50,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:37:50,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:37:50,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:37:50,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:37:50,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:37:50,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:37:50,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:37:50,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:37:50,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:37:50,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:37:50,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:37:50,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:37:50,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:37:50,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:37:50,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:37:50,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:37:50,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:37:50,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:37:50,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:37:50,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:37:50,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:37:50,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:37:50,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:37:50,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:37:50,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:37:50,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:37:50,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:37:50,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:37:50,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:37:50,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:37:50,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:37:50,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:37:50,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:37:50,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:37:50,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:37:50,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:37:50,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:37:50,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:37:50,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:37:50,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:37:50,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:37:50,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:37:50,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:37:50,973 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:37:50,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:37:50,974 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:37:50,974 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:37:50,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:37:50,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:37:50,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:37:50,975 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:37:50,975 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:37:50,975 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:37:50,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:37:50,976 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:37:50,976 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:37:50,976 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:37:50,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:37:50,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:37:50,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:37:50,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:37:50,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:37:50,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:37:50,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:37:50,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:37:50,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:37:50,979 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_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 [2021-10-21 19:37:51,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:37:51,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:37:51,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:37:51,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:37:51,286 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:37:51,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-10-21 19:37:51,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/data/ae1a6f3b2/f605b8131d82447bbf26c671b6084586/FLAG6492c0450 [2021-10-21 19:37:51,876 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:37:51,876 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-10-21 19:37:51,884 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/data/ae1a6f3b2/f605b8131d82447bbf26c671b6084586/FLAG6492c0450 [2021-10-21 19:37:52,238 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/data/ae1a6f3b2/f605b8131d82447bbf26c671b6084586 [2021-10-21 19:37:52,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:37:52,243 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:37:52,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:37:52,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:37:52,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:37:52,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:37:52" (1/1) ... [2021-10-21 19:37:52,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44eb6889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52, skipping insertion in model container [2021-10-21 19:37:52,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:37:52" (1/1) ... [2021-10-21 19:37:52,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:37:52,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:37:52,458 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-10-21 19:37:52,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:37:52,493 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:37:52,506 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-10-21 19:37:52,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:37:52,538 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:37:52,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52 WrapperNode [2021-10-21 19:37:52,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:37:52,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:37:52,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:37:52,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:37:52,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52" (1/1) ... [2021-10-21 19:37:52,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52" (1/1) ... [2021-10-21 19:37:52,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52" (1/1) ... [2021-10-21 19:37:52,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52" (1/1) ... [2021-10-21 19:37:52,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52" (1/1) ... [2021-10-21 19:37:52,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52" (1/1) ... [2021-10-21 19:37:52,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52" (1/1) ... [2021-10-21 19:37:52,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:37:52,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:37:52,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:37:52,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:37:52,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52" (1/1) ... [2021-10-21 19:37:52,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:37:52,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:37:52,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:37:52,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:37:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:37:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:37:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:37:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-10-21 19:37:52,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-10-21 19:37:52,662 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-10-21 19:37:52,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:37:52,662 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-10-21 19:37:52,663 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:37:52,663 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:37:52,663 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:37:52,663 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:37:52,663 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:37:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:37:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-10-21 19:37:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-10-21 19:37:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:37:52,664 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-10-21 19:37:52,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:37:52,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:37:52,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:37:52,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-10-21 19:37:52,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:37:52,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:37:52,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:37:52,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:37:52,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:37:53,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:37:53,225 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-10-21 19:37:53,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:37:53 BoogieIcfgContainer [2021-10-21 19:37:53,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:37:53,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:37:53,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:37:53,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:37:53,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:37:52" (1/3) ... [2021-10-21 19:37:53,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3112d763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:37:53, skipping insertion in model container [2021-10-21 19:37:53,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:37:52" (2/3) ... [2021-10-21 19:37:53,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3112d763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:37:53, skipping insertion in model container [2021-10-21 19:37:53,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:37:53" (3/3) ... [2021-10-21 19:37:53,245 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2021-10-21 19:37:53,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:37:53,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-10-21 19:37:53,316 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:37:53,322 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 [2021-10-21 19:37:53,323 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-10-21 19:37:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 55 states have internal predecessors, (59), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-10-21 19:37:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:37:53,351 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:53,352 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:53,353 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:37:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:53,358 INFO L82 PathProgramCache]: Analyzing trace with hash -404481820, now seen corresponding path program 1 times [2021-10-21 19:37:53,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:53,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774700185] [2021-10-21 19:37:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:53,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:53,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:53,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:37:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:53,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:37:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:53,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:37:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:37:53,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:53,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774700185] [2021-10-21 19:37:53,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774700185] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:53,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:53,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:37:53,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685193223] [2021-10-21 19:37:53,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:37:53,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:37:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:37:53,694 INFO L87 Difference]: Start difference. First operand has 73 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 55 states have internal predecessors, (59), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:37:54,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:54,006 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-10-21 19:37:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:37:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-10-21 19:37:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:54,017 INFO L225 Difference]: With dead ends: 73 [2021-10-21 19:37:54,018 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 19:37:54,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:37:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 19:37:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-21 19:37:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 53 states have internal predecessors, (55), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-10-21 19:37:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-21 19:37:54,092 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 30 [2021-10-21 19:37:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:54,093 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-21 19:37:54,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:37:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-21 19:37:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:37:54,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:54,095 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:54,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:37:54,096 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:37:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:54,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1206695456, now seen corresponding path program 1 times [2021-10-21 19:37:54,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:54,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594444645] [2021-10-21 19:37:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:54,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:54,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:54,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:37:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:54,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:37:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:54,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:37:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:37:54,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:54,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594444645] [2021-10-21 19:37:54,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594444645] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:54,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:54,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:37:54,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316439773] [2021-10-21 19:37:54,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:37:54,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:54,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:37:54,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:37:54,361 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:37:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:54,955 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2021-10-21 19:37:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:37:54,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-10-21 19:37:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:54,959 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:37:54,960 INFO L226 Difference]: Without dead ends: 114 [2021-10-21 19:37:54,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:37:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-21 19:37:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2021-10-21 19:37:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 53 states have (on average 1.528301886792453) internal successors, (81), 70 states have internal predecessors, (81), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-10-21 19:37:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2021-10-21 19:37:54,985 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 30 [2021-10-21 19:37:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:54,985 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2021-10-21 19:37:54,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 19:37:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2021-10-21 19:37:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:37:54,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:54,987 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:54,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:37:54,988 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:37:54,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:54,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1208436753, now seen corresponding path program 1 times [2021-10-21 19:37:54,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:54,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207122270] [2021-10-21 19:37:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:54,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:37:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:37:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:37:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:37:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:37:55,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:55,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207122270] [2021-10-21 19:37:55,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207122270] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:55,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:55,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:37:55,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658549226] [2021-10-21 19:37:55,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:37:55,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:37:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:37:55,200 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:37:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:55,478 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-10-21 19:37:55,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:37:55,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2021-10-21 19:37:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:55,481 INFO L225 Difference]: With dead ends: 90 [2021-10-21 19:37:55,481 INFO L226 Difference]: Without dead ends: 90 [2021-10-21 19:37:55,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:37:55,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-21 19:37:55,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-21 19:37:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.471698113207547) internal successors, (78), 67 states have internal predecessors, (78), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-10-21 19:37:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2021-10-21 19:37:55,492 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 30 [2021-10-21 19:37:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:55,493 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2021-10-21 19:37:55,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:37:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2021-10-21 19:37:55,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:37:55,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:55,494 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:55,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:37:55,495 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:37:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1208436752, now seen corresponding path program 1 times [2021-10-21 19:37:55,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:55,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735237668] [2021-10-21 19:37:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:55,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:37:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:37:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:37:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:37:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:55,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:55,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735237668] [2021-10-21 19:37:55,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735237668] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:55,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:55,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:37:55,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834814867] [2021-10-21 19:37:55,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:37:55,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:55,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:37:55,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:37:55,702 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:37:56,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:56,149 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2021-10-21 19:37:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:37:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2021-10-21 19:37:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:56,158 INFO L225 Difference]: With dead ends: 88 [2021-10-21 19:37:56,158 INFO L226 Difference]: Without dead ends: 88 [2021-10-21 19:37:56,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:37:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-21 19:37:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-10-21 19:37:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 65 states have internal predecessors, (76), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-10-21 19:37:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2021-10-21 19:37:56,167 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 30 [2021-10-21 19:37:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:56,167 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2021-10-21 19:37:56,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:37:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2021-10-21 19:37:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:37:56,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:56,169 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:56,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:37:56,169 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:37:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:56,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1666549967, now seen corresponding path program 1 times [2021-10-21 19:37:56,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:56,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920315722] [2021-10-21 19:37:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:56,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:56,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:56,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:37:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:56,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:37:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:56,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:37:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:56,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:37:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:37:56,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:56,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920315722] [2021-10-21 19:37:56,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920315722] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:56,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:56,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:37:56,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899334830] [2021-10-21 19:37:56,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:37:56,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:56,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:37:56,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:37:56,355 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:37:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:56,939 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2021-10-21 19:37:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:37:56,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-10-21 19:37:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:56,943 INFO L225 Difference]: With dead ends: 127 [2021-10-21 19:37:56,943 INFO L226 Difference]: Without dead ends: 127 [2021-10-21 19:37:56,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:37:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-21 19:37:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-10-21 19:37:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.396551724137931) internal successors, (81), 70 states have internal predecessors, (81), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-21 19:37:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2021-10-21 19:37:56,970 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 32 [2021-10-21 19:37:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:56,971 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2021-10-21 19:37:56,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-21 19:37:56,971 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2021-10-21 19:37:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:37:56,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:56,972 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:56,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:37:56,973 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:37:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:56,973 INFO L82 PathProgramCache]: Analyzing trace with hash 538307480, now seen corresponding path program 1 times [2021-10-21 19:37:56,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:56,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602680708] [2021-10-21 19:37:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:56,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:57,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:57,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:37:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:57,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:37:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:57,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:37:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:57,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:37:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:37:57,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:57,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602680708] [2021-10-21 19:37:57,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602680708] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:57,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:57,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:37:57,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291901360] [2021-10-21 19:37:57,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:37:57,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:37:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:37:57,280 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:37:57,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:57,991 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2021-10-21 19:37:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:37:57,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-10-21 19:37:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:57,995 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:37:57,995 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:37:57,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:37:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:37:58,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-21 19:37:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 73 states have internal predecessors, (84), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-21 19:37:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2021-10-21 19:37:58,017 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 37 [2021-10-21 19:37:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:58,017 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2021-10-21 19:37:58,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-21 19:37:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2021-10-21 19:37:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:37:58,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:58,021 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:58,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:37:58,022 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:37:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1956778269, now seen corresponding path program 1 times [2021-10-21 19:37:58,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:58,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050132585] [2021-10-21 19:37:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:58,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:37:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:37:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:37:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:37:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:37:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:37:58,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:58,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050132585] [2021-10-21 19:37:58,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050132585] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:58,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:58,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:37:58,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637745801] [2021-10-21 19:37:58,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:37:58,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:37:58,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:37:58,147 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:37:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:58,486 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-10-21 19:37:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:37:58,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-10-21 19:37:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:58,493 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:37:58,493 INFO L226 Difference]: Without dead ends: 94 [2021-10-21 19:37:58,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:37:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-21 19:37:58,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-21 19:37:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 69 states have internal predecessors, (76), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-21 19:37:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2021-10-21 19:37:58,507 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 38 [2021-10-21 19:37:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:58,507 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2021-10-21 19:37:58,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:37:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2021-10-21 19:37:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:37:58,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:58,510 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:58,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:37:58,511 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:37:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:58,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1956778268, now seen corresponding path program 1 times [2021-10-21 19:37:58,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:58,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569146144] [2021-10-21 19:37:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:58,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:37:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:37:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:37:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:37:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:37:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:37:58,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:58,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569146144] [2021-10-21 19:37:58,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569146144] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:58,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:58,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 19:37:58,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954608384] [2021-10-21 19:37:58,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:37:58,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:58,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:37:58,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:37:58,702 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:37:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:59,375 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2021-10-21 19:37:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:37:59,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-10-21 19:37:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:59,378 INFO L225 Difference]: With dead ends: 108 [2021-10-21 19:37:59,378 INFO L226 Difference]: Without dead ends: 108 [2021-10-21 19:37:59,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:37:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-21 19:37:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-21 19:37:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 69 states have internal predecessors, (75), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-21 19:37:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-10-21 19:37:59,389 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 38 [2021-10-21 19:37:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:59,390 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-10-21 19:37:59,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:37:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-10-21 19:37:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:37:59,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:59,398 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:59,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:37:59,399 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:37:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:59,400 INFO L82 PathProgramCache]: Analyzing trace with hash -530584177, now seen corresponding path program 1 times [2021-10-21 19:37:59,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:59,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925184084] [2021-10-21 19:37:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:59,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:59,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:59,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:37:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:59,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:37:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:59,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:37:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:59,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:37:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:59,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:37:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:37:59,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:59,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925184084] [2021-10-21 19:37:59,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925184084] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:37:59,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:37:59,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:37:59,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770774538] [2021-10-21 19:37:59,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:37:59,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:59,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:37:59,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:37:59,634 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:38:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:00,301 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-10-21 19:38:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:38:00,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-10-21 19:38:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:00,303 INFO L225 Difference]: With dead ends: 107 [2021-10-21 19:38:00,303 INFO L226 Difference]: Without dead ends: 107 [2021-10-21 19:38:00,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:38:00,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-21 19:38:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2021-10-21 19:38:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 69 states have internal predecessors, (74), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-21 19:38:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2021-10-21 19:38:00,309 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 39 [2021-10-21 19:38:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:00,310 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2021-10-21 19:38:00,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:38:00,310 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2021-10-21 19:38:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:38:00,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:00,311 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:00,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:38:00,312 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:00,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:00,313 INFO L82 PathProgramCache]: Analyzing trace with hash -685811321, now seen corresponding path program 1 times [2021-10-21 19:38:00,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:00,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864060410] [2021-10-21 19:38:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:00,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:38:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-10-21 19:38:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:38:00,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:00,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864060410] [2021-10-21 19:38:00,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864060410] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:00,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:00,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:38:00,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059535846] [2021-10-21 19:38:00,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:38:00,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:00,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:38:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:38:00,412 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:38:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:00,645 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-10-21 19:38:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:38:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-10-21 19:38:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:00,652 INFO L225 Difference]: With dead ends: 93 [2021-10-21 19:38:00,653 INFO L226 Difference]: Without dead ends: 93 [2021-10-21 19:38:00,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:38:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-21 19:38:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-10-21 19:38:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 68 states have internal predecessors, (73), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-21 19:38:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-10-21 19:38:00,666 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 40 [2021-10-21 19:38:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:00,666 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-10-21 19:38:00,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-21 19:38:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-10-21 19:38:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-21 19:38:00,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:00,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:00,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:38:00,668 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr7ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:00,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1934681174, now seen corresponding path program 1 times [2021-10-21 19:38:00,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:00,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535131886] [2021-10-21 19:38:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:00,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:38:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-10-21 19:38:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:38:00,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:00,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535131886] [2021-10-21 19:38:00,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535131886] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:00,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:38:00,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:38:00,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187976405] [2021-10-21 19:38:00,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:38:00,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:38:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:38:00,822 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:38:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:01,040 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2021-10-21 19:38:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:38:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2021-10-21 19:38:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:01,043 INFO L225 Difference]: With dead ends: 92 [2021-10-21 19:38:01,043 INFO L226 Difference]: Without dead ends: 78 [2021-10-21 19:38:01,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:38:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-21 19:38:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-21 19:38:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 56 states have internal predecessors, (60), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-10-21 19:38:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-10-21 19:38:01,049 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 42 [2021-10-21 19:38:01,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:01,049 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-10-21 19:38:01,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:38:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-10-21 19:38:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:38:01,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:01,051 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:01,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:38:01,051 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:01,052 INFO L82 PathProgramCache]: Analyzing trace with hash 424622284, now seen corresponding path program 1 times [2021-10-21 19:38:01,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:01,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846661764] [2021-10-21 19:38:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:01,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:01,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:01,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:01,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:01,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:01,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:38:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:01,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:38:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:38:01,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:01,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846661764] [2021-10-21 19:38:01,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846661764] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:01,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635370370] [2021-10-21 19:38:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:01,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:01,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:01,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:01,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:38:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:01,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:38:01,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:38:01,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635370370] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:01,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:38:01,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2021-10-21 19:38:01,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934810800] [2021-10-21 19:38:01,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:38:01,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:01,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:38:01,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:38:01,617 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:38:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:01,795 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-10-21 19:38:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:38:01,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-10-21 19:38:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:01,797 INFO L225 Difference]: With dead ends: 95 [2021-10-21 19:38:01,797 INFO L226 Difference]: Without dead ends: 95 [2021-10-21 19:38:01,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:38:01,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-21 19:38:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-10-21 19:38:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 59 states have internal predecessors, (63), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-10-21 19:38:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2021-10-21 19:38:01,803 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 47 [2021-10-21 19:38:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:01,804 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2021-10-21 19:38:01,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-21 19:38:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2021-10-21 19:38:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:38:01,805 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:01,805 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:01,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:02,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:38:02,029 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash 422889924, now seen corresponding path program 1 times [2021-10-21 19:38:02,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:02,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747825243] [2021-10-21 19:38:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:02,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:02,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:02,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:02,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:02,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:02,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:38:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:02,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:38:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:02,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:38:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:38:02,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:02,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747825243] [2021-10-21 19:38:02,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747825243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:02,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502817364] [2021-10-21 19:38:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:02,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:02,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:02,257 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:02,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:38:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:02,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:38:02,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:38:03,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502817364] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:03,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:03,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-10-21 19:38:03,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508703601] [2021-10-21 19:38:03,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:38:03,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:03,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:38:03,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:38:03,101 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 19 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-21 19:38:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:04,591 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2021-10-21 19:38:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:38:04,593 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 47 [2021-10-21 19:38:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:04,594 INFO L225 Difference]: With dead ends: 146 [2021-10-21 19:38:04,594 INFO L226 Difference]: Without dead ends: 144 [2021-10-21 19:38:04,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1045.2ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:38:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-21 19:38:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 118. [2021-10-21 19:38:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 85 states have internal predecessors, (95), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-10-21 19:38:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 144 transitions. [2021-10-21 19:38:04,613 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 144 transitions. Word has length 47 [2021-10-21 19:38:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:04,614 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 144 transitions. [2021-10-21 19:38:04,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-21 19:38:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 144 transitions. [2021-10-21 19:38:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:38:04,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:04,616 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:04,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:04,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:38:04,837 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1624676123, now seen corresponding path program 1 times [2021-10-21 19:38:04,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:04,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974603840] [2021-10-21 19:38:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:04,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:05,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:05,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:05,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:05,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:05,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:38:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:05,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:38:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:05,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:38:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:38:05,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:05,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974603840] [2021-10-21 19:38:05,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974603840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:05,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107439459] [2021-10-21 19:38:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:05,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:05,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:05,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:05,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:38:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:38:05,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:38:05,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107439459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:05,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:05,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-10-21 19:38:05,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855567555] [2021-10-21 19:38:05,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 19:38:05,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 19:38:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:38:05,942 INFO L87 Difference]: Start difference. First operand 118 states and 144 transitions. Second operand has 27 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-21 19:38:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:08,868 INFO L93 Difference]: Finished difference Result 213 states and 261 transitions. [2021-10-21 19:38:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 19:38:08,868 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 49 [2021-10-21 19:38:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:08,870 INFO L225 Difference]: With dead ends: 213 [2021-10-21 19:38:08,870 INFO L226 Difference]: Without dead ends: 213 [2021-10-21 19:38:08,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2189.8ms TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 19:38:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-21 19:38:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 147. [2021-10-21 19:38:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.198019801980198) internal successors, (121), 108 states have internal predecessors, (121), 26 states have call successors, (26), 13 states have call predecessors, (26), 14 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2021-10-21 19:38:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2021-10-21 19:38:08,882 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 49 [2021-10-21 19:38:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:08,883 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2021-10-21 19:38:08,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-21 19:38:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2021-10-21 19:38:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:38:08,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:08,884 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:08,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:09,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:38:09,097 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:09,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:09,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2017703133, now seen corresponding path program 1 times [2021-10-21 19:38:09,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:09,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766778713] [2021-10-21 19:38:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:09,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:09,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:09,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:09,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:09,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:09,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:38:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:09,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:38:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:09,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:38:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:38:09,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:09,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766778713] [2021-10-21 19:38:09,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766778713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:09,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85274594] [2021-10-21 19:38:09,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:09,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:09,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:09,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:09,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:38:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:09,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:38:09,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:09,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-10-21 19:38:11,583 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_3))) is different from true [2021-10-21 19:38:13,649 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_4 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_4))) is different from true [2021-10-21 19:38:13,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-10-21 19:38:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:38:13,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85274594] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:38:13,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:38:13,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 16 [2021-10-21 19:38:13,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741193354] [2021-10-21 19:38:13,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:38:13,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:38:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=155, Unknown=2, NotChecked=50, Total=240 [2021-10-21 19:38:13,803 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:38:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:13,949 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-21 19:38:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:38:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2021-10-21 19:38:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:13,950 INFO L225 Difference]: With dead ends: 96 [2021-10-21 19:38:13,951 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 19:38:13,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4209.9ms TimeCoverageRelationStatistics Valid=48, Invalid=230, Unknown=2, NotChecked=62, Total=342 [2021-10-21 19:38:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 19:38:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-21 19:38:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 69 states have internal predecessors, (72), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-10-21 19:38:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-10-21 19:38:13,956 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 49 [2021-10-21 19:38:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:13,956 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-10-21 19:38:13,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-21 19:38:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-10-21 19:38:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-21 19:38:13,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:13,957 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:13,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:14,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:14,158 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:14,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:14,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1905730051, now seen corresponding path program 1 times [2021-10-21 19:38:14,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:14,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490460144] [2021-10-21 19:38:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:14,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:14,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:14,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:14,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:14,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:14,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:38:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:14,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:38:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:14,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:38:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:38:14,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:14,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490460144] [2021-10-21 19:38:14,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490460144] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:14,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206435421] [2021-10-21 19:38:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:14,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:14,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:14,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:14,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:38:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:14,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:38:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:14,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-10-21 19:38:16,752 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_5))) is different from true [2021-10-21 19:38:18,805 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_6 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_6))) is different from true [2021-10-21 19:38:20,860 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_7 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_7))) is different from true [2021-10-21 19:38:20,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-10-21 19:38:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2021-10-21 19:38:21,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206435421] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:21,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:21,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-10-21 19:38:21,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077674926] [2021-10-21 19:38:21,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:38:21,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:21,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:38:21,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=415, Unknown=3, NotChecked=126, Total=600 [2021-10-21 19:38:21,145 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-21 19:38:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:36,149 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-21 19:38:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:38:36,150 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 54 [2021-10-21 19:38:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:36,150 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:38:36,151 INFO L226 Difference]: Without dead ends: 94 [2021-10-21 19:38:36,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 20837.8ms TimeCoverageRelationStatistics Valid=172, Invalid=1023, Unknown=7, NotChecked=204, Total=1406 [2021-10-21 19:38:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-21 19:38:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-21 19:38:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-10-21 19:38:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-10-21 19:38:36,156 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 54 [2021-10-21 19:38:36,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:36,156 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-10-21 19:38:36,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-21 19:38:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-10-21 19:38:36,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:38:36,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:36,158 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:36,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:36,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:38:36,373 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:36,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash -807259696, now seen corresponding path program 1 times [2021-10-21 19:38:36,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:36,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745677430] [2021-10-21 19:38:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:36,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:36,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:36,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:36,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:36,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:36,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:38:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:36,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:38:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:36,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-21 19:38:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:36,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-21 19:38:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 19:38:36,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:36,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745677430] [2021-10-21 19:38:36,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745677430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:36,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123799262] [2021-10-21 19:38:36,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:36,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:36,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:36,613 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:36,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:38:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 19:38:36,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:36,895 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 [2021-10-21 19:38:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:38:38,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123799262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:38,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:38,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-21 19:38:38,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413051973] [2021-10-21 19:38:38,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:38:38,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:38:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=258, Unknown=1, NotChecked=0, Total=306 [2021-10-21 19:38:38,680 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 18 states, 16 states have (on average 3.0625) internal successors, (49), 12 states have internal predecessors, (49), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-10-21 19:38:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:40,164 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2021-10-21 19:38:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:38:40,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 12 states have internal predecessors, (49), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 55 [2021-10-21 19:38:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:40,166 INFO L225 Difference]: With dead ends: 112 [2021-10-21 19:38:40,166 INFO L226 Difference]: Without dead ends: 112 [2021-10-21 19:38:40,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2040.0ms TimeCoverageRelationStatistics Valid=233, Invalid=956, Unknown=1, NotChecked=0, Total=1190 [2021-10-21 19:38:40,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-21 19:38:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-10-21 19:38:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 74 states have internal predecessors, (77), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2021-10-21 19:38:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-10-21 19:38:40,172 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 55 [2021-10-21 19:38:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:40,173 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-10-21 19:38:40,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 12 states have internal predecessors, (49), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-10-21 19:38:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-10-21 19:38:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:38:40,174 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:40,174 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:40,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:40,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:38:40,408 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash 744753187, now seen corresponding path program 1 times [2021-10-21 19:38:40,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:40,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607032735] [2021-10-21 19:38:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:40,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:40,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:40,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:40,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:40,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:40,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:38:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:40,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:38:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:40,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-21 19:38:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:40,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-21 19:38:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 19:38:40,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:40,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607032735] [2021-10-21 19:38:40,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607032735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:40,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617850476] [2021-10-21 19:38:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:40,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:40,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:40,664 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:40,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:38:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:40,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 19:38:40,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:41,025 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 [2021-10-21 19:38:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:38:42,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617850476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:42,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:42,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-21 19:38:42,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115355509] [2021-10-21 19:38:42,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:38:42,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:42,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:38:42,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:38:42,050 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 18 states, 16 states have (on average 3.1875) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-10-21 19:38:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:43,478 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2021-10-21 19:38:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:38:43,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 56 [2021-10-21 19:38:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:43,479 INFO L225 Difference]: With dead ends: 111 [2021-10-21 19:38:43,479 INFO L226 Difference]: Without dead ends: 111 [2021-10-21 19:38:43,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1210.3ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:38:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-21 19:38:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2021-10-21 19:38:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2021-10-21 19:38:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-10-21 19:38:43,485 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 56 [2021-10-21 19:38:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:43,486 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-10-21 19:38:43,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-10-21 19:38:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-10-21 19:38:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-21 19:38:43,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:43,487 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:43,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-21 19:38:43,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:38:43,693 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:43,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:43,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1851163875, now seen corresponding path program 1 times [2021-10-21 19:38:43,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:43,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883140482] [2021-10-21 19:38:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:43,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:43,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:43,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:43,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:43,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:43,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:38:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:44,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:38:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:44,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:38:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:44,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-10-21 19:38:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:44,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:38:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 19:38:44,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:44,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883140482] [2021-10-21 19:38:44,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883140482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:44,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313545392] [2021-10-21 19:38:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:44,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:44,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:44,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:44,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:38:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:44,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 19:38:44,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:44,405 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 [2021-10-21 19:38:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:38:45,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313545392] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:45,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:45,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-10-21 19:38:45,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977107053] [2021-10-21 19:38:45,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 19:38:45,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:45,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 19:38:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:38:45,347 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 27 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-21 19:38:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:49,150 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-10-21 19:38:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:38:49,151 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 62 [2021-10-21 19:38:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:49,152 INFO L225 Difference]: With dead ends: 105 [2021-10-21 19:38:49,152 INFO L226 Difference]: Without dead ends: 84 [2021-10-21 19:38:49,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1335.3ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 19:38:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-21 19:38:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-21 19:38:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-10-21 19:38:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-10-21 19:38:49,156 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 62 [2021-10-21 19:38:49,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:49,156 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-10-21 19:38:49,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-21 19:38:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-10-21 19:38:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-21 19:38:49,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:49,158 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:49,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-21 19:38:49,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:49,365 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-21 19:38:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash -619591727, now seen corresponding path program 1 times [2021-10-21 19:38:49,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:49,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979299925] [2021-10-21 19:38:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:49,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:38:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 19:38:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:38:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:38:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 19:38:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-21 19:38:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 19:38:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:38:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-10-21 19:38:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-21 19:38:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-21 19:38:49,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:49,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979299925] [2021-10-21 19:38:49,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979299925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:49,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503034334] [2021-10-21 19:38:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:49,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:49,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:49,809 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:49,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:38:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:50,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:38:50,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-21 19:38:50,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503034334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:50,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:50,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-10-21 19:38:50,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931140125] [2021-10-21 19:38:50,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-21 19:38:50,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:50,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-21 19:38:50,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:38:50,788 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 32 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2021-10-21 19:38:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:53,071 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-10-21 19:38:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:38:53,072 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) Word has length 79 [2021-10-21 19:38:53,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:53,072 INFO L225 Difference]: With dead ends: 88 [2021-10-21 19:38:53,072 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:38:53,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2171.7ms TimeCoverageRelationStatistics Valid=410, Invalid=2452, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 19:38:53,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:38:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:38:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:38:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:38:53,074 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2021-10-21 19:38:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:53,074 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:38:53,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2021-10-21 19:38:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:38:53,075 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:38:53,077 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:38:53,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:38:53,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:38:53,079 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:38:53,081 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:38:53,081 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:38:53,081 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:38:53,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:38:53,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATION [2021-10-21 19:38:53,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION [2021-10-21 19:38:53,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION [2021-10-21 19:38:53,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION [2021-10-21 19:38:53,083 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION [2021-10-21 19:38:53,083 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION [2021-10-21 19:38:53,083 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION [2021-10-21 19:38:53,083 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION [2021-10-21 19:38:53,083 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:38:53,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:53,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-10-21 19:38:53,306 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:38:53,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:38:53 BoogieIcfgContainer [2021-10-21 19:38:53,317 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:38:53,318 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:38:53,320 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:38:53,321 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:38:53,321 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:37:53" (3/4) ... [2021-10-21 19:38:53,326 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:38:53,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-21 19:38:53,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:38:53,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-10-21 19:38:53,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:38:53,336 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-10-21 19:38:53,336 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-10-21 19:38:53,336 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-10-21 19:38:53,349 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-21 19:38:53,350 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-21 19:38:53,350 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:38:53,351 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:38:53,401 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:38:53,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:38:53,405 INFO L168 Benchmark]: Toolchain (without parser) took 61160.39 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 71.5 MB in the beginning and 78.0 MB in the end (delta: -6.5 MB). Peak memory consumption was 16.9 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:53,405 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 113.2 MB. Free memory was 88.2 MB in the beginning and 88.1 MB in the end (delta: 62.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:38:53,406 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.88 ms. Allocated memory is still 113.2 MB. Free memory was 71.3 MB in the beginning and 86.9 MB in the end (delta: -15.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:53,406 INFO L168 Benchmark]: Boogie Preprocessor took 36.06 ms. Allocated memory is still 113.2 MB. Free memory was 86.9 MB in the beginning and 85.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:38:53,406 INFO L168 Benchmark]: RCFGBuilder took 650.93 ms. Allocated memory is still 113.2 MB. Free memory was 85.1 MB in the beginning and 71.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:53,407 INFO L168 Benchmark]: TraceAbstraction took 60082.55 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 70.8 MB in the beginning and 81.1 MB in the end (delta: -10.4 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:53,407 INFO L168 Benchmark]: Witness Printer took 85.11 ms. Allocated memory is still 136.3 MB. Free memory was 81.1 MB in the beginning and 78.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:38:53,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 113.2 MB. Free memory was 88.2 MB in the beginning and 88.1 MB in the end (delta: 62.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.88 ms. Allocated memory is still 113.2 MB. Free memory was 71.3 MB in the beginning and 86.9 MB in the end (delta: -15.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.06 ms. Allocated memory is still 113.2 MB. Free memory was 86.9 MB in the beginning and 85.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 650.93 ms. Allocated memory is still 113.2 MB. Free memory was 85.1 MB in the beginning and 71.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 60082.55 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 70.8 MB in the beginning and 81.1 MB in the end (delta: -10.4 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. * Witness Printer took 85.11 ms. Allocated memory is still 136.3 MB. Free memory was 81.1 MB in the beginning and 78.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 76 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 59991.8ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 42.0ms, AutomataDifference: 33918.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 839 SDtfs, 2986 SDslu, 1722 SDs, 0 SdLazy, 9730 SolverSat, 1624 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 9709.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1123 GetRequests, 653 SyntacticMatches, 27 SemanticMatches, 443 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 37181.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=14, InterpolantAutomatonStates: 289, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 234.6ms AutomataMinimizationTime, 20 MinimizatonAttempts, 204 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 145.3ms SsaConstructionTime, 661.5ms SatisfiabilityAnalysisTime, 21182.2ms InterpolantComputationTime, 1382 NumberOfCodeBlocks, 1382 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1353 ConstructedInterpolants, 109 QuantifiedInterpolants, 7625 SizeOfPredicates, 72 NumberOfNonLiveVariables, 2298 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 29 InterpolantComputations, 13 PerfectInterpolantSequences, 418/506 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 19:38:53,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5006ff6d-6dfd-4cf8-91cc-412cff2c2fbf/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...