./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL --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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:57:24,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:57:24,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:57:25,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:57:25,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:57:25,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:57:25,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:57:25,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:57:25,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:57:25,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:57:25,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:57:25,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:57:25,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:57:25,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:57:25,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:57:25,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:57:25,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:57:25,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:57:25,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:57:25,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:57:25,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:57:25,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:57:25,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:57:25,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:57:25,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:57:25,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:57:25,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:57:25,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:57:25,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:57:25,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:57:25,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:57:25,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:57:25,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:57:25,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:57:25,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:57:25,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:57:25,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:57:25,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:57:25,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:57:25,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:57:25,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:57:25,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 04:57:25,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:57:25,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:57:25,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:57:25,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:57:25,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:57:25,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:57:25,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:57:25,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:57:25,132 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:57:25,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:57:25,133 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:57:25,133 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:57:25,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:57:25,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:57:25,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:57:25,134 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:57:25,134 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:57:25,134 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:57:25,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:57:25,135 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:57:25,135 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:57:25,135 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:57:25,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:57:25,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:57:25,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:57:25,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:57:25,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:57:25,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:57:25,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:57:25,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:57:25,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:57:25,137 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_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a [2021-11-19 04:57:25,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:57:25,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:57:25,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:57:25,469 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:57:25,470 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:57:25,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-11-19 04:57:25,565 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/data/0a73fa689/9bb8ef1986dd4b12bf3caee77226a048/FLAG61aa8d5e6 [2021-11-19 04:57:25,990 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:57:25,991 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-11-19 04:57:26,001 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/data/0a73fa689/9bb8ef1986dd4b12bf3caee77226a048/FLAG61aa8d5e6 [2021-11-19 04:57:26,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/data/0a73fa689/9bb8ef1986dd4b12bf3caee77226a048 [2021-11-19 04:57:26,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:57:26,400 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:57:26,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:57:26,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:57:26,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:57:26,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:57:26" (1/1) ... [2021-11-19 04:57:26,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4d420b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26, skipping insertion in model container [2021-11-19 04:57:26,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:57:26" (1/1) ... [2021-11-19 04:57:26,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:57:26,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:57:26,570 WARN L230 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_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-11-19 04:57:26,609 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:57:26,642 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:57:26,659 WARN L230 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_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-11-19 04:57:26,685 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:57:26,704 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:57:26,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26 WrapperNode [2021-11-19 04:57:26,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:57:26,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:57:26,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:57:26,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:57:26,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26" (1/1) ... [2021-11-19 04:57:26,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26" (1/1) ... [2021-11-19 04:57:26,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26" (1/1) ... [2021-11-19 04:57:26,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26" (1/1) ... [2021-11-19 04:57:26,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26" (1/1) ... [2021-11-19 04:57:26,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26" (1/1) ... [2021-11-19 04:57:26,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26" (1/1) ... [2021-11-19 04:57:26,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:57:26,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:57:26,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:57:26,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:57:26,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26" (1/1) ... [2021-11-19 04:57:26,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:57:26,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:26,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:57:26,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:57:26,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:57:26,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:57:26,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-19 04:57:26,868 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 04:57:26,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 04:57:26,869 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-11-19 04:57:26,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:57:26,870 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 04:57:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:57:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:57:26,870 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:57:26,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-19 04:57:26,871 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-19 04:57:26,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:57:26,871 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 04:57:26,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 04:57:26,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-19 04:57:26,872 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-11-19 04:57:26,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:57:26,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:57:26,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:57:26,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 04:57:26,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:57:26,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:57:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:57:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:57:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:57:26,982 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:57:26,983 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:57:27,231 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:57:27,250 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:57:27,251 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 04:57:27,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:27 BoogieIcfgContainer [2021-11-19 04:57:27,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:57:27,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:57:27,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:57:27,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:57:27,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:57:26" (1/3) ... [2021-11-19 04:57:27,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7c43f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:57:27, skipping insertion in model container [2021-11-19 04:57:27,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:26" (2/3) ... [2021-11-19 04:57:27,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7c43f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:57:27, skipping insertion in model container [2021-11-19 04:57:27,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:27" (3/3) ... [2021-11-19 04:57:27,261 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-11-19 04:57:27,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:57:27,267 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-19 04:57:27,319 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:57:27,326 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:57:27,326 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-19 04:57:27,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 46 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 04:57:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:57:27,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:27,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:27,354 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2145046431, now seen corresponding path program 1 times [2021-11-19 04:57:27,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:27,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847101269] [2021-11-19 04:57:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:27,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:27,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:27,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:27,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:27,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847101269] [2021-11-19 04:57:27,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847101269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:57:27,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:57:27,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:57:27,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897517161] [2021-11-19 04:57:27,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:57:27,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:57:27,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:27,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:57:27,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:57:27,625 INFO L87 Difference]: Start difference. First operand has 62 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 46 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:57:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:27,789 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-11-19 04:57:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:57:27,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-19 04:57:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:27,800 INFO L225 Difference]: With dead ends: 62 [2021-11-19 04:57:27,801 INFO L226 Difference]: Without dead ends: 59 [2021-11-19 04:57:27,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:57:27,807 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:27,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 57 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:57:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-19 04:57:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-19 04:57:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.4375) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 04:57:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-11-19 04:57:27,850 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 24 [2021-11-19 04:57:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:27,851 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-11-19 04:57:27,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:57:27,851 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-11-19 04:57:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:57:27,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:27,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:27,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:57:27,854 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:27,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1123978077, now seen corresponding path program 1 times [2021-11-19 04:57:27,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:27,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99573122] [2021-11-19 04:57:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:27,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:28,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:28,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:28,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:28,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99573122] [2021-11-19 04:57:28,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99573122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:57:28,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:57:28,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:57:28,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563729238] [2021-11-19 04:57:28,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:57:28,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:57:28,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:57:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:57:28,067 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:57:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:28,576 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2021-11-19 04:57:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:57:28,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-11-19 04:57:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:28,586 INFO L225 Difference]: With dead ends: 104 [2021-11-19 04:57:28,593 INFO L226 Difference]: Without dead ends: 104 [2021-11-19 04:57:28,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:57:28,597 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 172 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:28,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 92 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:57:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-19 04:57:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-11-19 04:57:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 48 states have (on average 1.5) internal successors, (72), 61 states have internal predecessors, (72), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:57:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-11-19 04:57:28,634 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 24 [2021-11-19 04:57:28,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:28,635 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-11-19 04:57:28,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:57:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-11-19 04:57:28,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:57:28,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:28,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:28,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:57:28,639 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:28,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1122354309, now seen corresponding path program 1 times [2021-11-19 04:57:28,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:28,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226711865] [2021-11-19 04:57:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:28,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:28,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:28,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:28,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:28,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:57:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:28,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:28,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226711865] [2021-11-19 04:57:28,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226711865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:57:28,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:57:28,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:57:28,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706953274] [2021-11-19 04:57:28,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:57:28,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:57:28,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:57:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:57:28,797 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:28,973 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2021-11-19 04:57:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:57:28,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-11-19 04:57:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:28,976 INFO L225 Difference]: With dead ends: 81 [2021-11-19 04:57:28,977 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 04:57:28,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:57:28,981 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 90 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:28,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 68 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:57:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 04:57:29,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-19 04:57:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 60 states have internal predecessors, (71), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:57:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-11-19 04:57:29,005 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 24 [2021-11-19 04:57:29,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:29,006 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-11-19 04:57:29,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:29,007 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-11-19 04:57:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:57:29,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:29,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:29,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:57:29,008 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:29,009 INFO L85 PathProgramCache]: Analyzing trace with hash 433245261, now seen corresponding path program 1 times [2021-11-19 04:57:29,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:29,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104094537] [2021-11-19 04:57:29,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:29,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:57:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:29,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:29,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104094537] [2021-11-19 04:57:29,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104094537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:57:29,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:57:29,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:57:29,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031274262] [2021-11-19 04:57:29,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:57:29,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:57:29,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:57:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:57:29,091 INFO L87 Difference]: Start difference. First operand 81 states and 98 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:29,293 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-11-19 04:57:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:57:29,294 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-11-19 04:57:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:29,297 INFO L225 Difference]: With dead ends: 80 [2021-11-19 04:57:29,297 INFO L226 Difference]: Without dead ends: 80 [2021-11-19 04:57:29,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:57:29,305 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 86 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:29,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 61 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:57:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-19 04:57:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-19 04:57:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 59 states have internal predecessors, (70), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:57:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2021-11-19 04:57:29,323 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 25 [2021-11-19 04:57:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:29,324 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2021-11-19 04:57:29,324 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2021-11-19 04:57:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 04:57:29,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:29,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:29,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:57:29,326 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash 545701255, now seen corresponding path program 1 times [2021-11-19 04:57:29,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:29,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719836291] [2021-11-19 04:57:29,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:29,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:57:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:29,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:29,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719836291] [2021-11-19 04:57:29,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719836291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:57:29,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:57:29,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:57:29,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419526068] [2021-11-19 04:57:29,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:57:29,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:57:29,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:57:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:57:29,457 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:29,636 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2021-11-19 04:57:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:57:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-11-19 04:57:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:29,638 INFO L225 Difference]: With dead ends: 79 [2021-11-19 04:57:29,638 INFO L226 Difference]: Without dead ends: 79 [2021-11-19 04:57:29,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:57:29,639 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 77 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:29,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 61 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:57:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-19 04:57:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-19 04:57:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 48 states have (on average 1.4375) internal successors, (69), 58 states have internal predecessors, (69), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:57:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2021-11-19 04:57:29,658 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 26 [2021-11-19 04:57:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:29,658 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2021-11-19 04:57:29,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2021-11-19 04:57:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:57:29,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:29,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:29,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:57:29,661 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:29,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:29,662 INFO L85 PathProgramCache]: Analyzing trace with hash 869775126, now seen corresponding path program 1 times [2021-11-19 04:57:29,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:29,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418587289] [2021-11-19 04:57:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:29,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:57:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:29,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:29,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418587289] [2021-11-19 04:57:29,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418587289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:57:29,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:57:29,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:57:29,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615372675] [2021-11-19 04:57:29,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:57:29,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:57:29,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:29,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:57:29,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:57:29,819 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:30,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:30,037 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-11-19 04:57:30,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:57:30,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-11-19 04:57:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:30,041 INFO L225 Difference]: With dead ends: 75 [2021-11-19 04:57:30,041 INFO L226 Difference]: Without dead ends: 75 [2021-11-19 04:57:30,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:57:30,044 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 107 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:30,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 52 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:57:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-19 04:57:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-19 04:57:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 54 states have internal predecessors, (61), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:57:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2021-11-19 04:57:30,057 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 27 [2021-11-19 04:57:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:30,058 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2021-11-19 04:57:30,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2021-11-19 04:57:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:57:30,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:30,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:30,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:57:30,062 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:30,062 INFO L85 PathProgramCache]: Analyzing trace with hash 869775127, now seen corresponding path program 1 times [2021-11-19 04:57:30,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:30,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495799497] [2021-11-19 04:57:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:30,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:30,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:30,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:30,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:30,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:57:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:30,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:30,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495799497] [2021-11-19 04:57:30,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495799497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:57:30,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:57:30,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:57:30,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7710811] [2021-11-19 04:57:30,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:57:30,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:57:30,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:57:30,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:57:30,279 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:30,731 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2021-11-19 04:57:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:57:30,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-11-19 04:57:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:30,734 INFO L225 Difference]: With dead ends: 92 [2021-11-19 04:57:30,734 INFO L226 Difference]: Without dead ends: 92 [2021-11-19 04:57:30,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:57:30,735 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 153 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:30,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 59 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:57:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-19 04:57:30,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2021-11-19 04:57:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.25) internal successors, (60), 54 states have internal predecessors, (60), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:57:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-11-19 04:57:30,742 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 27 [2021-11-19 04:57:30,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:30,743 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-11-19 04:57:30,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:30,743 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-11-19 04:57:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:57:30,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:30,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:30,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:57:30,745 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:30,745 INFO L85 PathProgramCache]: Analyzing trace with hash -263130224, now seen corresponding path program 1 times [2021-11-19 04:57:30,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:30,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135829620] [2021-11-19 04:57:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:30,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:30,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:30,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:30,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:30,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:57:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:30,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:30,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135829620] [2021-11-19 04:57:30,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135829620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:57:30,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:57:30,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:57:30,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794745747] [2021-11-19 04:57:30,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:57:30,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:57:30,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:30,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:57:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:57:30,834 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:57:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:31,039 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2021-11-19 04:57:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:57:31,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2021-11-19 04:57:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:31,041 INFO L225 Difference]: With dead ends: 74 [2021-11-19 04:57:31,041 INFO L226 Difference]: Without dead ends: 69 [2021-11-19 04:57:31,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:57:31,042 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 95 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:31,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 39 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:57:31,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-19 04:57:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-19 04:57:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 49 states have internal predecessors, (55), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:57:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2021-11-19 04:57:31,047 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 27 [2021-11-19 04:57:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:31,047 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2021-11-19 04:57:31,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:57:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2021-11-19 04:57:31,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 04:57:31,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:31,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:31,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:57:31,049 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:31,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:31,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1193225136, now seen corresponding path program 1 times [2021-11-19 04:57:31,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:31,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128974651] [2021-11-19 04:57:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:31,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:57:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:31,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:31,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128974651] [2021-11-19 04:57:31,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128974651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:57:31,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:57:31,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:57:31,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729467064] [2021-11-19 04:57:31,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:57:31,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:57:31,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:57:31,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:57:31,212 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:31,699 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-11-19 04:57:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:57:31,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-11-19 04:57:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:31,701 INFO L225 Difference]: With dead ends: 83 [2021-11-19 04:57:31,701 INFO L226 Difference]: Without dead ends: 83 [2021-11-19 04:57:31,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:57:31,703 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 156 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:31,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 62 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:57:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-19 04:57:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2021-11-19 04:57:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.255813953488372) internal successors, (54), 49 states have internal predecessors, (54), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:57:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-11-19 04:57:31,708 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 28 [2021-11-19 04:57:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:31,708 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-11-19 04:57:31,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:57:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-11-19 04:57:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:57:31,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:31,710 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:57:31,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:57:31,710 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:31,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1954320756, now seen corresponding path program 1 times [2021-11-19 04:57:31,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:31,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652635606] [2021-11-19 04:57:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:31,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:57:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:31,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:31,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652635606] [2021-11-19 04:57:31,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652635606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:31,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064612878] [2021-11-19 04:57:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:31,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:31,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:31,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:31,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:57:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:31,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:57:31,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:32,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:57:32,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064612878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:57:32,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:57:32,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2021-11-19 04:57:32,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453147205] [2021-11-19 04:57:32,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:57:32,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:57:32,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:57:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:57:32,333 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:57:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:32,522 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2021-11-19 04:57:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:57:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2021-11-19 04:57:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:32,524 INFO L225 Difference]: With dead ends: 87 [2021-11-19 04:57:32,524 INFO L226 Difference]: Without dead ends: 87 [2021-11-19 04:57:32,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:57:32,526 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 73 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:32,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 250 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:57:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-19 04:57:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2021-11-19 04:57:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 52 states have internal predecessors, (57), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:57:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-11-19 04:57:32,536 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 36 [2021-11-19 04:57:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:32,536 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-11-19 04:57:32,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:57:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-11-19 04:57:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:57:32,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:32,542 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:57:32,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:57:32,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:32,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1410945416, now seen corresponding path program 1 times [2021-11-19 04:57:32,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:32,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886537936] [2021-11-19 04:57:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:32,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:32,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:32,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:32,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:32,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:57:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:32,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:57:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:57:32,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:32,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886537936] [2021-11-19 04:57:32,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886537936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:32,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533025338] [2021-11-19 04:57:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:32,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:32,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:32,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:33,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:57:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:33,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 04:57:33,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:33,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:57:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:34,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:57:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:57:35,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533025338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:57:35,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:57:35,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2021-11-19 04:57:35,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363083461] [2021-11-19 04:57:35,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:57:35,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:57:35,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:35,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:57:35,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=711, Unknown=1, NotChecked=0, Total=812 [2021-11-19 04:57:35,422 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 29 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 16 states have call successors, (19), 11 states have call predecessors, (19), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:57:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:38,181 INFO L93 Difference]: Finished difference Result 194 states and 230 transitions. [2021-11-19 04:57:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 04:57:38,182 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 16 states have call successors, (19), 11 states have call predecessors, (19), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 39 [2021-11-19 04:57:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:38,188 INFO L225 Difference]: With dead ends: 194 [2021-11-19 04:57:38,189 INFO L226 Difference]: Without dead ends: 183 [2021-11-19 04:57:38,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=551, Invalid=2988, Unknown=1, NotChecked=0, Total=3540 [2021-11-19 04:57:38,193 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 418 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:38,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 241 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1693 Invalid, 0 Unknown, 236 Unchecked, 1.4s Time] [2021-11-19 04:57:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-19 04:57:38,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2021-11-19 04:57:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.236842105263158) internal successors, (94), 83 states have internal predecessors, (94), 24 states have call successors, (24), 13 states have call predecessors, (24), 11 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-19 04:57:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2021-11-19 04:57:38,211 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 39 [2021-11-19 04:57:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:38,212 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2021-11-19 04:57:38,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 16 states have call successors, (19), 11 states have call predecessors, (19), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:57:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2021-11-19 04:57:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:57:38,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:38,215 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:57:38,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:57:38,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:38,431 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:38,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:38,431 INFO L85 PathProgramCache]: Analyzing trace with hash 789634911, now seen corresponding path program 1 times [2021-11-19 04:57:38,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:38,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898040795] [2021-11-19 04:57:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:38,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:38,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:38,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:38,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:38,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:57:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:38,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:57:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:57:38,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:38,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898040795] [2021-11-19 04:57:38,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898040795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:38,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776456390] [2021-11-19 04:57:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:38,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:38,654 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:38,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:57:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:38,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 04:57:38,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:38,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:57:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:40,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:57:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:57:40,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776456390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:57:40,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:57:40,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2021-11-19 04:57:40,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954034819] [2021-11-19 04:57:40,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:57:40,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:57:40,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:40,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:57:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=758, Unknown=1, NotChecked=0, Total=870 [2021-11-19 04:57:40,973 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand has 30 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 16 states have call successors, (19), 12 states have call predecessors, (19), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:57:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:46,961 INFO L93 Difference]: Finished difference Result 201 states and 255 transitions. [2021-11-19 04:57:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 04:57:46,961 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 16 states have call successors, (19), 12 states have call predecessors, (19), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 40 [2021-11-19 04:57:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:46,963 INFO L225 Difference]: With dead ends: 201 [2021-11-19 04:57:46,963 INFO L226 Difference]: Without dead ends: 201 [2021-11-19 04:57:46,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=526, Invalid=2441, Unknown=3, NotChecked=0, Total=2970 [2021-11-19 04:57:46,966 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 361 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:46,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 176 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1043 Invalid, 0 Unknown, 204 Unchecked, 0.9s Time] [2021-11-19 04:57:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-19 04:57:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 138. [2021-11-19 04:57:46,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 100 states have internal predecessors, (112), 30 states have call successors, (30), 15 states have call predecessors, (30), 13 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-19 04:57:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 169 transitions. [2021-11-19 04:57:46,979 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 169 transitions. Word has length 40 [2021-11-19 04:57:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:46,979 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 169 transitions. [2021-11-19 04:57:46,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 16 states have call successors, (19), 12 states have call predecessors, (19), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:57:46,980 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 169 transitions. [2021-11-19 04:57:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:57:46,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:46,981 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:57:47,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:57:47,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 04:57:47,195 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1158711008, now seen corresponding path program 1 times [2021-11-19 04:57:47,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:47,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433103019] [2021-11-19 04:57:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:47,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:47,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:47,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:47,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:47,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:57:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:57:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:47,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-19 04:57:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:57:47,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:47,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433103019] [2021-11-19 04:57:47,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433103019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:47,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263752277] [2021-11-19 04:57:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:47,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:47,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:47,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:47,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:57:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 04:57:47,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:57:47,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:57:48,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-19 04:57:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:57:48,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263752277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:57:48,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:57:48,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2021-11-19 04:57:48,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110125298] [2021-11-19 04:57:48,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:57:48,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:57:48,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:57:48,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:57:48,372 INFO L87 Difference]: Start difference. First operand 138 states and 169 transitions. Second operand has 26 states, 23 states have (on average 2.130434782608696) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2021-11-19 04:57:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:49,684 INFO L93 Difference]: Finished difference Result 195 states and 245 transitions. [2021-11-19 04:57:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 04:57:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.130434782608696) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) Word has length 41 [2021-11-19 04:57:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:49,686 INFO L225 Difference]: With dead ends: 195 [2021-11-19 04:57:49,687 INFO L226 Difference]: Without dead ends: 195 [2021-11-19 04:57:49,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=368, Invalid=1794, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:57:49,689 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 216 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:49,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 203 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:57:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-19 04:57:49,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 137. [2021-11-19 04:57:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 99 states have internal predecessors, (107), 30 states have call successors, (30), 15 states have call predecessors, (30), 13 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-19 04:57:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2021-11-19 04:57:49,700 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 41 [2021-11-19 04:57:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:49,701 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2021-11-19 04:57:49,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.130434782608696) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (18), 6 states have call predecessors, (18), 2 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2021-11-19 04:57:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2021-11-19 04:57:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:57:49,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:49,702 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:57:49,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:57:49,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 04:57:49,920 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1124748705, now seen corresponding path program 1 times [2021-11-19 04:57:49,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:49,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246301416] [2021-11-19 04:57:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:49,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:50,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:50,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:50,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:50,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:57:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:50,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:57:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:50,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-19 04:57:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:57:50,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:50,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246301416] [2021-11-19 04:57:50,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246301416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:50,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792041204] [2021-11-19 04:57:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:50,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:50,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:50,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:50,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:57:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:50,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:57:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:57:50,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:57:51,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-19 04:57:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:57:51,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792041204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:57:51,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:57:51,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 37 [2021-11-19 04:57:51,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96540524] [2021-11-19 04:57:51,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:57:51,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 04:57:51,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:57:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 04:57:51,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:57:51,607 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand has 38 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (19), 7 states have call predecessors, (19), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-19 04:57:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:54,424 INFO L93 Difference]: Finished difference Result 295 states and 372 transitions. [2021-11-19 04:57:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-19 04:57:54,427 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (19), 7 states have call predecessors, (19), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 43 [2021-11-19 04:57:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:54,430 INFO L225 Difference]: With dead ends: 295 [2021-11-19 04:57:54,430 INFO L226 Difference]: Without dead ends: 295 [2021-11-19 04:57:54,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=758, Invalid=5562, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 04:57:54,433 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 324 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 494 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:54,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 266 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1507 Invalid, 0 Unknown, 494 Unchecked, 1.0s Time] [2021-11-19 04:57:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-19 04:57:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 184. [2021-11-19 04:57:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 124 states have (on average 1.1209677419354838) internal successors, (139), 130 states have internal predecessors, (139), 40 states have call successors, (40), 16 states have call predecessors, (40), 18 states have return successors, (47), 37 states have call predecessors, (47), 37 states have call successors, (47) [2021-11-19 04:57:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 226 transitions. [2021-11-19 04:57:54,453 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 226 transitions. Word has length 43 [2021-11-19 04:57:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:54,454 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 226 transitions. [2021-11-19 04:57:54,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (19), 7 states have call predecessors, (19), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-19 04:57:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 226 transitions. [2021-11-19 04:57:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:57:54,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:54,455 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:57:54,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-19 04:57:54,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 04:57:54,671 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:57:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:54,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1965960192, now seen corresponding path program 1 times [2021-11-19 04:57:54,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:54,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228028123] [2021-11-19 04:57:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:54,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:54,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:57:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:54,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:57:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:54,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:57:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:54,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:57:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:54,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:57:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:54,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-19 04:57:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:57:54,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:54,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228028123] [2021-11-19 04:57:54,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228028123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:54,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429891654] [2021-11-19 04:57:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:54,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:54,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:54,913 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:54,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:57:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:54,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:57:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:54,996 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 [2021-11-19 04:57:57,023 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_19 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_19))) is different from true [2021-11-19 04:57:59,073 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_20 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_20))) is different from true [2021-11-19 04:58:01,104 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_21 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_21))) is different from true [2021-11-19 04:58:01,216 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 [2021-11-19 04:58:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-19 04:58:01,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:58:03,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429891654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:58:03,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:58:03,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-19 04:58:03,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807993013] [2021-11-19 04:58:03,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:58:03,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:58:03,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:58:03,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:58:03,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=588, Unknown=3, NotChecked=150, Total=812 [2021-11-19 04:58:03,565 INFO L87 Difference]: Start difference. First operand 184 states and 226 transitions. Second operand has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:58:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:58:16,248 INFO L93 Difference]: Finished difference Result 218 states and 261 transitions. [2021-11-19 04:58:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:58:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 48 [2021-11-19 04:58:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:58:16,251 INFO L225 Difference]: With dead ends: 218 [2021-11-19 04:58:16,251 INFO L226 Difference]: Without dead ends: 211 [2021-11-19 04:58:16,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=206, Invalid=1439, Unknown=7, NotChecked=240, Total=1892 [2021-11-19 04:58:16,253 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 111 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:58:16,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 125 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 554 Invalid, 0 Unknown, 336 Unchecked, 0.3s Time] [2021-11-19 04:58:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-19 04:58:16,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2021-11-19 04:58:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 148 states have internal predecessors, (160), 42 states have call successors, (42), 19 states have call predecessors, (42), 21 states have return successors, (48), 41 states have call predecessors, (48), 39 states have call successors, (48) [2021-11-19 04:58:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 250 transitions. [2021-11-19 04:58:16,264 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 250 transitions. Word has length 48 [2021-11-19 04:58:16,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:58:16,264 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 250 transitions. [2021-11-19 04:58:16,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:58:16,265 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 250 transitions. [2021-11-19 04:58:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:58:16,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:58:16,266 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:58:16,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-19 04:58:16,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 04:58:16,466 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:58:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:58:16,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1511358654, now seen corresponding path program 1 times [2021-11-19 04:58:16,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:58:16,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36680995] [2021-11-19 04:58:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:58:16,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:58:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:16,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:58:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:16,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:58:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:16,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:58:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:16,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:58:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:16,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:58:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:16,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-19 04:58:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:58:16,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:58:16,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36680995] [2021-11-19 04:58:16,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36680995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:58:16,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40867158] [2021-11-19 04:58:16,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:58:16,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:58:16,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:58:16,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:58:16,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:58:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:16,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:58:16,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:58:16,726 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 [2021-11-19 04:58:18,762 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_22 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_22))) is different from true [2021-11-19 04:58:18,823 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 [2021-11-19 04:58:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:58:18,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:58:18,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40867158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:58:18,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:58:18,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 15 [2021-11-19 04:58:18,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773348045] [2021-11-19 04:58:18,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:58:18,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:58:18,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:58:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:58:18,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=154, Unknown=1, NotChecked=24, Total=210 [2021-11-19 04:58:18,882 INFO L87 Difference]: Start difference. First operand 209 states and 250 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:58:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:58:18,938 INFO L93 Difference]: Finished difference Result 164 states and 190 transitions. [2021-11-19 04:58:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:58:18,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2021-11-19 04:58:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:58:18,939 INFO L225 Difference]: With dead ends: 164 [2021-11-19 04:58:18,960 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 04:58:18,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=40, Invalid=203, Unknown=1, NotChecked=28, Total=272 [2021-11-19 04:58:18,962 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:58:18,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 285 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 92 Unchecked, 0.0s Time] [2021-11-19 04:58:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 04:58:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-19 04:58:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 116 states have internal predecessors, (124), 31 states have call successors, (31), 17 states have call predecessors, (31), 18 states have return successors, (35), 30 states have call predecessors, (35), 29 states have call successors, (35) [2021-11-19 04:58:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2021-11-19 04:58:18,980 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 48 [2021-11-19 04:58:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:58:18,981 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2021-11-19 04:58:18,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:58:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2021-11-19 04:58:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 04:58:18,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:58:18,983 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 04:58:19,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:58:19,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:58:19,199 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:58:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:58:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash 849264284, now seen corresponding path program 1 times [2021-11-19 04:58:19,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:58:19,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981503672] [2021-11-19 04:58:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:58:19,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:58:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:19,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:58:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:19,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:58:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:19,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:58:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:19,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:58:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:19,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:58:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:19,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:58:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:19,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-19 04:58:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:19,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:58:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 04:58:19,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:58:19,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981503672] [2021-11-19 04:58:19,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981503672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:58:19,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955505126] [2021-11-19 04:58:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:58:19,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:58:19,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:58:19,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:58:19,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:58:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:19,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 04:58:19,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:58:19,555 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 [2021-11-19 04:58:21,584 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_23 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_23))) is different from true [2021-11-19 04:58:23,636 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_25 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_25))) is different from true [2021-11-19 04:58:25,679 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_27 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_27))) is different from true [2021-11-19 04:58:25,747 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 [2021-11-19 04:58:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 12 not checked. [2021-11-19 04:58:25,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:58:27,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955505126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:58:27,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:58:27,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 21 [2021-11-19 04:58:27,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202354066] [2021-11-19 04:58:27,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:58:27,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:58:27,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:58:27,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:58:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=377, Unknown=3, NotChecked=120, Total=552 [2021-11-19 04:58:27,967 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 16 states have internal predecessors, (58), 6 states have call successors, (18), 9 states have call predecessors, (18), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 04:58:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:58:48,519 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-11-19 04:58:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:58:48,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 16 states have internal predecessors, (58), 6 states have call successors, (18), 9 states have call predecessors, (18), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 72 [2021-11-19 04:58:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:58:48,521 INFO L225 Difference]: With dead ends: 77 [2021-11-19 04:58:48,521 INFO L226 Difference]: Without dead ends: 77 [2021-11-19 04:58:48,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=194, Invalid=1289, Unknown=11, NotChecked=228, Total=1722 [2021-11-19 04:58:48,522 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:58:48,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 102 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 388 Invalid, 0 Unknown, 213 Unchecked, 0.2s Time] [2021-11-19 04:58:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-19 04:58:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-19 04:58:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 04:58:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-19 04:58:48,526 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 72 [2021-11-19 04:58:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:58:48,527 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-19 04:58:48,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 16 states have internal predecessors, (58), 6 states have call successors, (18), 9 states have call predecessors, (18), 6 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 04:58:48,527 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-19 04:58:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:58:48,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:58:48,528 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-19 04:58:48,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-19 04:58:48,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 04:58:48,755 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-11-19 04:58:48,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:58:48,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1689044429, now seen corresponding path program 1 times [2021-11-19 04:58:48,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:58:48,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318941283] [2021-11-19 04:58:48,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:58:48,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:58:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:48,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:58:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:48,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:58:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:48,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:58:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:48,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:58:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:48,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:58:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:49,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:58:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:49,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:58:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:49,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:58:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:49,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 04:58:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:49,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:58:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 04:58:49,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:58:49,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318941283] [2021-11-19 04:58:49,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318941283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:58:49,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294145960] [2021-11-19 04:58:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:58:49,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:58:49,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:58:49,179 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:58:49,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:58:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:49,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 04:58:49,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:58:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 04:58:50,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:58:52,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294145960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:58:52,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:58:52,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-11-19 04:58:52,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817113806] [2021-11-19 04:58:52,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:58:52,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 04:58:52,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:58:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 04:58:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 04:58:52,657 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 33 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 16 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-19 04:58:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:58:54,448 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-11-19 04:58:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:58:54,449 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 16 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) Word has length 73 [2021-11-19 04:58:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:58:54,450 INFO L225 Difference]: With dead ends: 81 [2021-11-19 04:58:54,450 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 04:58:54,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=527, Invalid=3763, Unknown=0, NotChecked=0, Total=4290 [2021-11-19 04:58:54,452 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 152 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:58:54,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 257 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 982 Invalid, 0 Unknown, 124 Unchecked, 0.5s Time] [2021-11-19 04:58:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 04:58:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 04:58:54,453 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) [2021-11-19 04:58:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 04:58:54,453 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-11-19 04:58:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:58:54,453 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 04:58:54,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 16 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-19 04:58:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 04:58:54,454 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 04:58:54,456 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_FREE (12 of 13 remaining) [2021-11-19 04:58:54,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ASSERT_VIOLATIONMEMORY_FREE (11 of 13 remaining) [2021-11-19 04:58:54,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_FREE (10 of 13 remaining) [2021-11-19 04:58:54,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2021-11-19 04:58:54,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATION (8 of 13 remaining) [2021-11-19 04:58:54,458 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION (7 of 13 remaining) [2021-11-19 04:58:54,458 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION (6 of 13 remaining) [2021-11-19 04:58:54,458 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION (5 of 13 remaining) [2021-11-19 04:58:54,458 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION (4 of 13 remaining) [2021-11-19 04:58:54,458 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION (3 of 13 remaining) [2021-11-19 04:58:54,459 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION (2 of 13 remaining) [2021-11-19 04:58:54,459 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION (1 of 13 remaining) [2021-11-19 04:58:54,459 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2021-11-19 04:58:54,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-19 04:58:54,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:58:54,677 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:58:54,679 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 04:58:54,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:58:54 BoogieIcfgContainer [2021-11-19 04:58:54,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 04:58:54,682 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 04:58:54,682 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 04:58:54,683 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 04:58:54,684 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:27" (3/4) ... [2021-11-19 04:58:54,686 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-19 04:58:54,691 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-11-19 04:58:54,691 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-11-19 04:58:54,691 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-19 04:58:54,691 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-11-19 04:58:54,691 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-19 04:58:54,691 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-11-19 04:58:54,691 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-11-19 04:58:54,696 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-11-19 04:58:54,696 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-11-19 04:58:54,696 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-19 04:58:54,697 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-19 04:58:54,729 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/witness.graphml [2021-11-19 04:58:54,730 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 04:58:54,730 INFO L158 Benchmark]: Toolchain (without parser) took 88331.00ms. Allocated memory was 94.4MB in the beginning and 197.1MB in the end (delta: 102.8MB). Free memory was 59.0MB in the beginning and 142.8MB in the end (delta: -83.7MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. [2021-11-19 04:58:54,731 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 94.4MB. Free memory was 67.4MB in the beginning and 67.4MB in the end (delta: 29.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:58:54,731 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.81ms. Allocated memory was 94.4MB in the beginning and 136.3MB in the end (delta: 41.9MB). Free memory was 58.8MB in the beginning and 111.4MB in the end (delta: -52.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 04:58:54,732 INFO L158 Benchmark]: Boogie Preprocessor took 62.59ms. Allocated memory is still 136.3MB. Free memory was 111.4MB in the beginning and 110.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 04:58:54,732 INFO L158 Benchmark]: RCFGBuilder took 481.32ms. Allocated memory is still 136.3MB. Free memory was 110.0MB in the beginning and 96.7MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 04:58:54,733 INFO L158 Benchmark]: TraceAbstraction took 87426.47ms. Allocated memory was 136.3MB in the beginning and 197.1MB in the end (delta: 60.8MB). Free memory was 96.0MB in the beginning and 146.6MB in the end (delta: -50.6MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2021-11-19 04:58:54,733 INFO L158 Benchmark]: Witness Printer took 48.07ms. Allocated memory is still 197.1MB. Free memory was 146.6MB in the beginning and 142.8MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 04:58:54,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 94.4MB. Free memory was 67.4MB in the beginning and 67.4MB in the end (delta: 29.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.81ms. Allocated memory was 94.4MB in the beginning and 136.3MB in the end (delta: 41.9MB). Free memory was 58.8MB in the beginning and 111.4MB in the end (delta: -52.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.59ms. Allocated memory is still 136.3MB. Free memory was 111.4MB in the beginning and 110.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 481.32ms. Allocated memory is still 136.3MB. Free memory was 110.0MB in the beginning and 96.7MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 87426.47ms. Allocated memory was 136.3MB in the beginning and 197.1MB in the end (delta: 60.8MB). Free memory was 96.0MB in the beginning and 146.6MB in the end (delta: -50.6MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. * Witness Printer took 48.07ms. Allocated memory is still 197.1MB. Free memory was 146.6MB in the beginning and 142.8MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 41]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: 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: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: 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, 65 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 87.4s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 51.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2749 SdHoareTripleChecker+Valid, 7.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2746 mSDsluCounter, 2456 SdHoareTripleChecker+Invalid, 5.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1699 IncrementalHoareTripleChecker+Unchecked, 1661 mSDsCounter, 1615 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9049 IncrementalHoareTripleChecker+Invalid, 12363 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1615 mSolverCounterUnsat, 795 mSDtfsCounter, 9049 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1245 GetRequests, 713 SyntacticMatches, 28 SemanticMatches, 504 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 67.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=209occurred in iteration=15, InterpolantAutomatonStates: 318, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 369 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 32.9s InterpolantComputationTime, 1112 NumberOfCodeBlocks, 1112 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1244 ConstructedInterpolants, 73 QuantifiedInterpolants, 7167 SizeOfPredicates, 83 NumberOfNonLiveVariables, 1882 ConjunctsInSsa, 200 ConjunctsInUnsatCore, 31 InterpolantComputations, 11 PerfectInterpolantSequences, 220/325 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 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-19 04:58:54,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8facdc6-54f8-47dd-b9cf-a5217f9347ce/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE