./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 b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg --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 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:41:10,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:41:10,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:41:10,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:41:10,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:41:10,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:41:10,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:41:10,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:41:11,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:41:11,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:41:11,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:41:11,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:41:11,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:41:11,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:41:11,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:41:11,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:41:11,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:41:11,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:41:11,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:41:11,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:41:11,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:41:11,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:41:11,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:41:11,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:41:11,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:41:11,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:41:11,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:41:11,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:41:11,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:41:11,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:41:11,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:41:11,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:41:11,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:41:11,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:41:11,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:41:11,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:41:11,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:41:11,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:41:11,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:41:11,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:41:11,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:41:11,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 08:41:11,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:41:11,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:41:11,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:41:11,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:41:11,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:41:11,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:41:11,092 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:41:11,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:41:11,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:41:11,093 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:41:11,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:41:11,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:41:11,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:41:11,093 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:41:11,094 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:41:11,094 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:41:11,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:41:11,094 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:41:11,095 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:41:11,095 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:41:11,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:41:11,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:41:11,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:41:11,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:41:11,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:41:11,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:41:11,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:41:11,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:41:11,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:41:11,097 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_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a [2021-10-28 08:41:11,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:41:11,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:41:11,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:41:11,516 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:41:11,518 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:41:11,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-10-28 08:41:11,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/data/f6ceeb718/1d5e9e8e859447a3b78bc1597e61c856/FLAG5a99c7491 [2021-10-28 08:41:12,174 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:41:12,175 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-10-28 08:41:12,187 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/data/f6ceeb718/1d5e9e8e859447a3b78bc1597e61c856/FLAG5a99c7491 [2021-10-28 08:41:12,512 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/data/f6ceeb718/1d5e9e8e859447a3b78bc1597e61c856 [2021-10-28 08:41:12,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:41:12,517 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:41:12,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:41:12,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:41:12,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:41:12,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:41:12" (1/1) ... [2021-10-28 08:41:12,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aeb1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12, skipping insertion in model container [2021-10-28 08:41:12,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:41:12" (1/1) ... [2021-10-28 08:41:12,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:41:12,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:41:12,759 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-10-28 08:41:12,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:41:12,808 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:41:12,823 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-10-28 08:41:12,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:41:12,852 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:41:12,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12 WrapperNode [2021-10-28 08:41:12,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:41:12,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:41:12,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:41:12,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:41:12,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12" (1/1) ... [2021-10-28 08:41:12,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12" (1/1) ... [2021-10-28 08:41:12,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12" (1/1) ... [2021-10-28 08:41:12,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12" (1/1) ... [2021-10-28 08:41:12,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12" (1/1) ... [2021-10-28 08:41:12,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12" (1/1) ... [2021-10-28 08:41:12,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12" (1/1) ... [2021-10-28 08:41:12,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:41:12,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:41:12,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:41:12,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:41:12,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12" (1/1) ... [2021-10-28 08:41:12,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:41:12,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:41:12,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:41:12,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:41:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:41:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:41:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:41:12,997 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-10-28 08:41:12,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-10-28 08:41:12,998 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-10-28 08:41:12,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:41:12,998 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-10-28 08:41:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:41:13,000 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:41:13,001 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:41:13,001 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:41:13,001 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:41:13,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:41:13,001 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-10-28 08:41:13,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-10-28 08:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-10-28 08:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-10-28 08:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:41:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:41:13,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:41:13,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:41:13,489 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-10-28 08:41:13,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:41:13 BoogieIcfgContainer [2021-10-28 08:41:13,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:41:13,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:41:13,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:41:13,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:41:13,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:41:12" (1/3) ... [2021-10-28 08:41:13,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371bf68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:41:13, skipping insertion in model container [2021-10-28 08:41:13,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:41:12" (2/3) ... [2021-10-28 08:41:13,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371bf68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:41:13, skipping insertion in model container [2021-10-28 08:41:13,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:41:13" (3/3) ... [2021-10-28 08:41:13,502 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-10-28 08:41:13,509 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:41:13,509 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-10-28 08:41:13,564 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:41:13,572 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:41:13,573 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-10-28 08:41:13,593 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) [2021-10-28 08:41:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 08:41:13,603 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:13,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:41:13,604 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)] === [2021-10-28 08:41:13,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2145046431, now seen corresponding path program 1 times [2021-10-28 08:41:13,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:13,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478692943] [2021-10-28 08:41:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:13,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:13,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:13,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:14,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:14,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:14,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478692943] [2021-10-28 08:41:14,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478692943] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:14,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:41:14,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:41:14,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910297146] [2021-10-28 08:41:14,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:41:14,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:41:14,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:41:14,088 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) [2021-10-28 08:41:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:14,349 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-10-28 08:41:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:41:14,352 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 [2021-10-28 08:41:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:14,363 INFO L225 Difference]: With dead ends: 62 [2021-10-28 08:41:14,364 INFO L226 Difference]: Without dead ends: 59 [2021-10-28 08:41:14,366 INFO L786 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 [2021-10-28 08:41:14,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-28 08:41:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-28 08:41:14,412 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) [2021-10-28 08:41:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-10-28 08:41:14,416 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 24 [2021-10-28 08:41:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:14,417 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-10-28 08:41:14,418 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) [2021-10-28 08:41:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-10-28 08:41:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 08:41:14,420 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:14,420 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:41:14,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:41:14,421 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)] === [2021-10-28 08:41:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1123978077, now seen corresponding path program 1 times [2021-10-28 08:41:14,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:14,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391485076] [2021-10-28 08:41:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:14,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:14,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:14,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:14,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:14,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:14,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391485076] [2021-10-28 08:41:14,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391485076] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:14,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:41:14,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:41:14,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208299153] [2021-10-28 08:41:14,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:41:14,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:14,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:41:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:41:14,737 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) [2021-10-28 08:41:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:15,618 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2021-10-28 08:41:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:41:15,619 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 [2021-10-28 08:41:15,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:15,630 INFO L225 Difference]: With dead ends: 104 [2021-10-28 08:41:15,634 INFO L226 Difference]: Without dead ends: 104 [2021-10-28 08:41:15,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:41:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-28 08:41:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-10-28 08:41:15,694 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) [2021-10-28 08:41:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-10-28 08:41:15,699 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 24 [2021-10-28 08:41:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:15,699 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-10-28 08:41:15,700 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) [2021-10-28 08:41:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-10-28 08:41:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 08:41:15,701 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:15,702 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:41:15,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:41:15,703 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1122354309, now seen corresponding path program 1 times [2021-10-28 08:41:15,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:15,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128027893] [2021-10-28 08:41:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:15,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:15,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:15,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:15,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:15,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 08:41:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:15,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:15,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128027893] [2021-10-28 08:41:15,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128027893] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:15,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:41:15,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:41:15,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389334117] [2021-10-28 08:41:15,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:41:15,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:41:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:41:15,920 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) [2021-10-28 08:41:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:16,176 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2021-10-28 08:41:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:41:16,177 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 [2021-10-28 08:41:16,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:16,179 INFO L225 Difference]: With dead ends: 81 [2021-10-28 08:41:16,179 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 08:41:16,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:41:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 08:41:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-28 08:41:16,189 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) [2021-10-28 08:41:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-10-28 08:41:16,191 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 24 [2021-10-28 08:41:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:16,192 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-10-28 08:41:16,192 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) [2021-10-28 08:41:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-10-28 08:41:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 08:41:16,194 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:16,194 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:41:16,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:41:16,195 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:16,196 INFO L85 PathProgramCache]: Analyzing trace with hash 433245261, now seen corresponding path program 1 times [2021-10-28 08:41:16,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:16,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823588176] [2021-10-28 08:41:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:16,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:16,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:16,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:16,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:16,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 08:41:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:16,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:16,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823588176] [2021-10-28 08:41:16,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823588176] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:16,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:41:16,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:41:16,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751335975] [2021-10-28 08:41:16,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:41:16,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:16,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:41:16,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:41:16,311 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) [2021-10-28 08:41:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:16,579 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-10-28 08:41:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:41:16,580 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 [2021-10-28 08:41:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:16,582 INFO L225 Difference]: With dead ends: 80 [2021-10-28 08:41:16,582 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 08:41:16,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:41:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 08:41:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-28 08:41:16,591 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) [2021-10-28 08:41:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2021-10-28 08:41:16,593 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 25 [2021-10-28 08:41:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:16,593 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2021-10-28 08:41:16,594 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) [2021-10-28 08:41:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2021-10-28 08:41:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 08:41:16,595 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:16,595 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:41:16,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:41:16,596 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:16,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:16,597 INFO L85 PathProgramCache]: Analyzing trace with hash 545701255, now seen corresponding path program 1 times [2021-10-28 08:41:16,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:16,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789461452] [2021-10-28 08:41:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:16,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:16,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:16,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:16,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:16,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 08:41:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:16,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:16,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789461452] [2021-10-28 08:41:16,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789461452] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:16,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:41:16,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:41:16,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741026159] [2021-10-28 08:41:16,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:41:16,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:41:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:41:16,705 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) [2021-10-28 08:41:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:16,997 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2021-10-28 08:41:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:41:16,998 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 [2021-10-28 08:41:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:17,000 INFO L225 Difference]: With dead ends: 79 [2021-10-28 08:41:17,000 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 08:41:17,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:41:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 08:41:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-10-28 08:41:17,024 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) [2021-10-28 08:41:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2021-10-28 08:41:17,026 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 26 [2021-10-28 08:41:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:17,027 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2021-10-28 08:41:17,027 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) [2021-10-28 08:41:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2021-10-28 08:41:17,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:41:17,029 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:17,029 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:41:17,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:41:17,030 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:17,031 INFO L85 PathProgramCache]: Analyzing trace with hash 869775126, now seen corresponding path program 1 times [2021-10-28 08:41:17,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:17,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231772372] [2021-10-28 08:41:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:17,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:17,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:17,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:17,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:17,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:17,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:17,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231772372] [2021-10-28 08:41:17,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231772372] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:17,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:41:17,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:41:17,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560065002] [2021-10-28 08:41:17,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:41:17,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:41:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:41:17,204 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) [2021-10-28 08:41:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:17,561 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-10-28 08:41:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:41:17,562 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 [2021-10-28 08:41:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:17,563 INFO L225 Difference]: With dead ends: 75 [2021-10-28 08:41:17,563 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 08:41:17,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:41:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 08:41:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 08:41:17,571 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) [2021-10-28 08:41:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2021-10-28 08:41:17,572 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 27 [2021-10-28 08:41:17,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:17,573 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2021-10-28 08:41:17,573 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) [2021-10-28 08:41:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2021-10-28 08:41:17,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:41:17,575 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:17,575 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:41:17,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:41:17,576 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:17,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash 869775127, now seen corresponding path program 1 times [2021-10-28 08:41:17,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:17,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737368736] [2021-10-28 08:41:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:17,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:17,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:17,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:17,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:17,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:17,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:17,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737368736] [2021-10-28 08:41:17,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737368736] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:17,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:41:17,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:41:17,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949409757] [2021-10-28 08:41:17,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:41:17,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:17,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:41:17,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:41:17,819 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) [2021-10-28 08:41:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:18,520 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2021-10-28 08:41:18,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:41:18,521 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 [2021-10-28 08:41:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:18,522 INFO L225 Difference]: With dead ends: 92 [2021-10-28 08:41:18,522 INFO L226 Difference]: Without dead ends: 92 [2021-10-28 08:41:18,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:41:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-28 08:41:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2021-10-28 08:41:18,528 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) [2021-10-28 08:41:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-10-28 08:41:18,530 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 27 [2021-10-28 08:41:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:18,530 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-10-28 08:41:18,530 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) [2021-10-28 08:41:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-10-28 08:41:18,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:41:18,531 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:18,531 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:41:18,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:41:18,532 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash -263130224, now seen corresponding path program 1 times [2021-10-28 08:41:18,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:18,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615466689] [2021-10-28 08:41:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:18,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:18,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:18,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:18,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:18,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 08:41:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:18,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:18,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615466689] [2021-10-28 08:41:18,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615466689] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:18,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:41:18,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:41:18,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166572639] [2021-10-28 08:41:18,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:41:18,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:41:18,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:41:18,648 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) [2021-10-28 08:41:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:18,839 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2021-10-28 08:41:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:41:18,840 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 [2021-10-28 08:41:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:18,842 INFO L225 Difference]: With dead ends: 74 [2021-10-28 08:41:18,842 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 08:41:18,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:41:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 08:41:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 08:41:18,847 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) [2021-10-28 08:41:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2021-10-28 08:41:18,848 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 27 [2021-10-28 08:41:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:18,849 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2021-10-28 08:41:18,849 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) [2021-10-28 08:41:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2021-10-28 08:41:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 08:41:18,850 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:18,850 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:41:18,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 08:41:18,851 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1193225136, now seen corresponding path program 1 times [2021-10-28 08:41:18,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:18,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830464458] [2021-10-28 08:41:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:18,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:19,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:19,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830464458] [2021-10-28 08:41:19,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830464458] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:19,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:41:19,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:41:19,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669225950] [2021-10-28 08:41:19,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:41:19,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:41:19,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:41:19,068 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) [2021-10-28 08:41:19,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:19,695 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-10-28 08:41:19,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:41:19,696 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 [2021-10-28 08:41:19,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:19,697 INFO L225 Difference]: With dead ends: 83 [2021-10-28 08:41:19,697 INFO L226 Difference]: Without dead ends: 83 [2021-10-28 08:41:19,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:41:19,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-28 08:41:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2021-10-28 08:41:19,702 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) [2021-10-28 08:41:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-10-28 08:41:19,703 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 28 [2021-10-28 08:41:19,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:19,704 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-10-28 08:41:19,704 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) [2021-10-28 08:41:19,704 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-10-28 08:41:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 08:41:19,706 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:19,706 INFO L513 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] [2021-10-28 08:41:19,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 08:41:19,706 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)] === [2021-10-28 08:41:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:19,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1954320756, now seen corresponding path program 1 times [2021-10-28 08:41:19,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:19,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131904564] [2021-10-28 08:41:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:19,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:19,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:19,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131904564] [2021-10-28 08:41:19,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131904564] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:19,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681125367] [2021-10-28 08:41:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:19,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:19,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:41:19,863 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:41:19,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:41:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:19,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 08:41:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:41:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:20,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681125367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:20,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:41:20,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2021-10-28 08:41:20,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067197953] [2021-10-28 08:41:20,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:41:20,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:20,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:41:20,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:41:20,344 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) [2021-10-28 08:41:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:20,507 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2021-10-28 08:41:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:41:20,507 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 [2021-10-28 08:41:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:20,511 INFO L225 Difference]: With dead ends: 87 [2021-10-28 08:41:20,511 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 08:41:20,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:41:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 08:41:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2021-10-28 08:41:20,516 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) [2021-10-28 08:41:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-10-28 08:41:20,519 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 36 [2021-10-28 08:41:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:20,519 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-10-28 08:41:20,519 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) [2021-10-28 08:41:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-10-28 08:41:20,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:41:20,527 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:20,527 INFO L513 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] [2021-10-28 08:41:20,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:41:20,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 08:41:20,735 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1410945416, now seen corresponding path program 1 times [2021-10-28 08:41:20,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:20,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970640401] [2021-10-28 08:41:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:20,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:20,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:20,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:20,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:20,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:20,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:41:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:41:20,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:20,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970640401] [2021-10-28 08:41:20,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970640401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:20,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190793040] [2021-10-28 08:41:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:20,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:20,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:41:20,959 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:41:20,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:41:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:21,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 08:41:21,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:41:21,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-28 08:41:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:22,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190793040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:22,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:41:22,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-10-28 08:41:22,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417976152] [2021-10-28 08:41:22,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 08:41:22,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 08:41:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=363, Unknown=1, NotChecked=0, Total=420 [2021-10-28 08:41:22,548 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-10-28 08:41:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:25,005 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2021-10-28 08:41:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 08:41:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2021-10-28 08:41:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:25,007 INFO L225 Difference]: With dead ends: 137 [2021-10-28 08:41:25,008 INFO L226 Difference]: Without dead ends: 137 [2021-10-28 08:41:25,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=257, Invalid=1148, Unknown=1, NotChecked=0, Total=1406 [2021-10-28 08:41:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-28 08:41:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-10-28 08:41:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 16 states have call successors, (16), 12 states have call predecessors, (16), 12 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2021-10-28 08:41:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-10-28 08:41:25,017 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 39 [2021-10-28 08:41:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:25,018 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-10-28 08:41:25,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-10-28 08:41:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-10-28 08:41:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 08:41:25,020 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:25,020 INFO L513 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] [2021-10-28 08:41:25,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:41:25,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:25,235 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:25,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:25,235 INFO L85 PathProgramCache]: Analyzing trace with hash 789634911, now seen corresponding path program 1 times [2021-10-28 08:41:25,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:25,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971415796] [2021-10-28 08:41:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:25,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:25,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:25,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:25,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:25,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:25,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:41:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:41:25,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:25,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971415796] [2021-10-28 08:41:25,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971415796] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:25,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210389056] [2021-10-28 08:41:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:25,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:41:25,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:41:25,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:41:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:25,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 08:41:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:41:25,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-28 08:41:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:26,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210389056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:26,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:41:26,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-10-28 08:41:26,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603943790] [2021-10-28 08:41:26,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 08:41:26,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:26,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 08:41:26,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:41:26,742 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-10-28 08:41:29,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:29,063 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2021-10-28 08:41:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 08:41:29,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 40 [2021-10-28 08:41:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:29,073 INFO L225 Difference]: With dead ends: 136 [2021-10-28 08:41:29,073 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 08:41:29,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 08:41:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 08:41:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2021-10-28 08:41:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 66 states have internal predecessors, (75), 16 states have call successors, (16), 12 states have call predecessors, (16), 12 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2021-10-28 08:41:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2021-10-28 08:41:29,084 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 40 [2021-10-28 08:41:29,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:29,084 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2021-10-28 08:41:29,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-10-28 08:41:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2021-10-28 08:41:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 08:41:29,086 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:29,087 INFO L513 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] [2021-10-28 08:41:29,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:41:29,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:29,302 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1158711008, now seen corresponding path program 1 times [2021-10-28 08:41:29,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:29,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561733854] [2021-10-28 08:41:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:29,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:29,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:29,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:29,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:29,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:29,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:41:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:29,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-10-28 08:41:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:41:29,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:29,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561733854] [2021-10-28 08:41:29,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561733854] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:29,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035134965] [2021-10-28 08:41:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:29,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:29,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:41:29,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:41:29,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:41:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:41:29,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:41:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:41:30,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035134965] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:30,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:41:30,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-10-28 08:41:30,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489330580] [2021-10-28 08:41:30,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 08:41:30,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 08:41:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:41:30,162 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-28 08:41:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:31,744 INFO L93 Difference]: Finished difference Result 130 states and 152 transitions. [2021-10-28 08:41:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 08:41:31,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 41 [2021-10-28 08:41:31,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:31,746 INFO L225 Difference]: With dead ends: 130 [2021-10-28 08:41:31,747 INFO L226 Difference]: Without dead ends: 130 [2021-10-28 08:41:31,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 08:41:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-28 08:41:31,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 94. [2021-10-28 08:41:31,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 67 states have internal predecessors, (73), 16 states have call successors, (16), 12 states have call predecessors, (16), 13 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2021-10-28 08:41:31,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2021-10-28 08:41:31,758 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 41 [2021-10-28 08:41:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:31,758 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2021-10-28 08:41:31,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-28 08:41:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2021-10-28 08:41:31,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 08:41:31,760 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:31,760 INFO L513 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] [2021-10-28 08:41:31,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:41:31,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:31,975 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:31,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1124748705, now seen corresponding path program 1 times [2021-10-28 08:41:31,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:31,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410383637] [2021-10-28 08:41:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:31,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:32,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:32,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:32,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:32,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:32,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:41:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:32,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-10-28 08:41:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:41:32,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:32,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410383637] [2021-10-28 08:41:32,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410383637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:32,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764232766] [2021-10-28 08:41:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:32,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:32,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:41:32,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:41:32,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:41:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:32,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:41:32,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:41:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:33,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764232766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:33,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:41:33,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-10-28 08:41:33,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291461635] [2021-10-28 08:41:33,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 08:41:33,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:33,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 08:41:33,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:41:33,485 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 27 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 11 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 08:41:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:39,315 INFO L93 Difference]: Finished difference Result 152 states and 177 transitions. [2021-10-28 08:41:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 08:41:39,316 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 11 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 43 [2021-10-28 08:41:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:39,318 INFO L225 Difference]: With dead ends: 152 [2021-10-28 08:41:39,318 INFO L226 Difference]: Without dead ends: 150 [2021-10-28 08:41:39,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=505, Invalid=2575, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 08:41:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-28 08:41:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 107. [2021-10-28 08:41:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 75 states have internal predecessors, (83), 19 states have call successors, (19), 13 states have call predecessors, (19), 13 states have return successors, (21), 18 states have call predecessors, (21), 17 states have call successors, (21) [2021-10-28 08:41:39,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2021-10-28 08:41:39,330 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 43 [2021-10-28 08:41:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:39,331 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2021-10-28 08:41:39,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 11 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 08:41:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2021-10-28 08:41:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 08:41:39,333 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:39,333 INFO L513 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] [2021-10-28 08:41:39,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-28 08:41:39,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:39,549 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:41:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:39,549 INFO L85 PathProgramCache]: Analyzing trace with hash -155114973, now seen corresponding path program 1 times [2021-10-28 08:41:39,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:39,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109843191] [2021-10-28 08:41:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:39,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:39,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:39,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:39,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:39,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:39,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:41:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:39,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-10-28 08:41:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:41:39,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:39,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109843191] [2021-10-28 08:41:39,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109843191] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:39,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703510396] [2021-10-28 08:41:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:39,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:39,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:41:39,829 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:41:39,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:41:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 08:41:40,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:41:40,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-10-28 08:41:42,283 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_11 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_11))) is different from true [2021-10-28 08:41:42,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-10-28 08:41:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:41:42,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703510396] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:41:42,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:41:42,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 21 [2021-10-28 08:41:42,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178768950] [2021-10-28 08:41:42,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:41:42,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:42,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:41:42,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=342, Unknown=1, NotChecked=36, Total=420 [2021-10-28 08:41:42,501 INFO L87 Difference]: Start difference. First operand 107 states and 123 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 08:41:42,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:42,693 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-10-28 08:41:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:41:42,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-10-28 08:41:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:42,695 INFO L225 Difference]: With dead ends: 98 [2021-10-28 08:41:42,695 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 08:41:42,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=54, Invalid=455, Unknown=1, NotChecked=42, Total=552 [2021-10-28 08:41:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 08:41:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-28 08:41:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 63 states have internal predecessors, (67), 16 states have call successors, (16), 12 states have call predecessors, (16), 10 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-10-28 08:41:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2021-10-28 08:41:42,701 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 43 [2021-10-28 08:41:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:42,701 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2021-10-28 08:41:42,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 08:41:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2021-10-28 08:41:42,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 08:41:42,709 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:42,709 INFO L513 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] [2021-10-28 08:41:42,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:41:42,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 08:41:42,935 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)] === [2021-10-28 08:41:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1965960192, now seen corresponding path program 1 times [2021-10-28 08:41:42,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:42,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509185587] [2021-10-28 08:41:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:42,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:43,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:43,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:43,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:41:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:43,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:43,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:41:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:43,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-10-28 08:41:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:41:43,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:43,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509185587] [2021-10-28 08:41:43,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509185587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:43,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053870915] [2021-10-28 08:41:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:43,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:43,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:41:43,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:41:43,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:41:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 08:41:43,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:41:43,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-10-28 08:41:45,641 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_12 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_12))) is different from true [2021-10-28 08:41:47,695 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_13 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_13))) is different from true [2021-10-28 08:41:49,726 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_14 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_14))) is different from true [2021-10-28 08:41:49,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-10-28 08:41:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-10-28 08:41:50,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053870915] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:50,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:41:50,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-10-28 08:41:50,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209135099] [2021-10-28 08:41:50,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 08:41:50,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:41:50,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 08:41:50,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=415, Unknown=3, NotChecked=126, Total=600 [2021-10-28 08:41:50,012 INFO L87 Difference]: Start difference. First operand 90 states and 97 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) [2021-10-28 08:42:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:05,008 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-10-28 08:42:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:42:05,009 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 [2021-10-28 08:42:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:05,009 INFO L225 Difference]: With dead ends: 92 [2021-10-28 08:42:05,010 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 08:42:05,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=172, Invalid=1023, Unknown=7, NotChecked=204, Total=1406 [2021-10-28 08:42:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 08:42:05,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 08:42:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-10-28 08:42:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-10-28 08:42:05,016 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 48 [2021-10-28 08:42:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:05,017 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-10-28 08:42:05,017 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) [2021-10-28 08:42:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-10-28 08:42:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-28 08:42:05,019 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:05,019 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:05,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:42:05,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:42:05,235 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:42:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1804090799, now seen corresponding path program 1 times [2021-10-28 08:42:05,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:05,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005099137] [2021-10-28 08:42:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:05,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:42:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:42:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:42:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-10-28 08:42:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-28 08:42:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-28 08:42:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 08:42:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:42:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 08:42:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 08:42:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-10-28 08:42:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-28 08:42:05,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:05,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005099137] [2021-10-28 08:42:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005099137] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:05,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075156263] [2021-10-28 08:42:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:05,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:42:05,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:42:05,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:42:05,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:42:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:06,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 08:42:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:42:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 08:42:07,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075156263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:07,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:42:07,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-10-28 08:42:07,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954501292] [2021-10-28 08:42:07,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 08:42:07,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 08:42:07,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 08:42:07,658 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 41 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 20 states have call successors, (28), 10 states have call predecessors, (28), 5 states have return successors, (20), 17 states have call predecessors, (20), 18 states have call successors, (20) [2021-10-28 08:42:12,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:12,844 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-10-28 08:42:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 08:42:12,845 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 20 states have call successors, (28), 10 states have call predecessors, (28), 5 states have return successors, (20), 17 states have call predecessors, (20), 18 states have call successors, (20) Word has length 97 [2021-10-28 08:42:12,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:12,846 INFO L225 Difference]: With dead ends: 132 [2021-10-28 08:42:12,846 INFO L226 Difference]: Without dead ends: 132 [2021-10-28 08:42:12,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=891, Invalid=5271, Unknown=0, NotChecked=0, Total=6162 [2021-10-28 08:42:12,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-28 08:42:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2021-10-28 08:42:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (25), 23 states have call predecessors, (25), 20 states have call successors, (25) [2021-10-28 08:42:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-10-28 08:42:12,859 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2021-10-28 08:42:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:12,859 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-10-28 08:42:12,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 20 states have call successors, (28), 10 states have call predecessors, (28), 5 states have return successors, (20), 17 states have call predecessors, (20), 18 states have call successors, (20) [2021-10-28 08:42:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-10-28 08:42:12,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-28 08:42:12,861 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:12,861 INFO L513 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] [2021-10-28 08:42:12,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:42:13,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 08:42:13,071 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-10-28 08:42:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1689044429, now seen corresponding path program 2 times [2021-10-28 08:42:13,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:13,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733435207] [2021-10-28 08:42:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:13,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:42:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 08:42:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:42:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 08:42:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 08:42:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 08:42:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 08:42:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 08:42:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-10-28 08:42:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 08:42:13,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:13,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733435207] [2021-10-28 08:42:13,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733435207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:13,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79366292] [2021-10-28 08:42:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:42:13,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:42:13,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:42:13,551 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:42:13,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:42:13,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:42:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:42:13,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 08:42:13,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:42:13,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-28 08:42:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 08:42:17,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79366292] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:17,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:42:17,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-10-28 08:42:17,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597534050] [2021-10-28 08:42:17,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 08:42:17,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 08:42:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1160, Unknown=1, NotChecked=0, Total=1260 [2021-10-28 08:42:17,024 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 36 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 17 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2021-10-28 08:42:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:20,414 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-10-28 08:42:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 08:42:20,415 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 17 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) Word has length 73 [2021-10-28 08:42:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:20,415 INFO L225 Difference]: With dead ends: 133 [2021-10-28 08:42:20,416 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 08:42:20,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=491, Invalid=3048, Unknown=1, NotChecked=0, Total=3540 [2021-10-28 08:42:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 08:42:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 08:42:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:42:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 08:42:20,417 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-10-28 08:42:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:20,418 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 08:42:20,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 17 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2021-10-28 08:42:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 08:42:20,418 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 08:42:20,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:42:20,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:42:20,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:42:20,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:42:20,422 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATION [2021-10-28 08:42:20,422 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION [2021-10-28 08:42:20,422 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION [2021-10-28 08:42:20,422 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION [2021-10-28 08:42:20,422 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION [2021-10-28 08:42:20,422 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION [2021-10-28 08:42:20,423 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION [2021-10-28 08:42:20,423 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION [2021-10-28 08:42:20,423 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 08:42:20,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:42:20,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 08:42:20,634 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:20,636 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:42:20,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:42:20 BoogieIcfgContainer [2021-10-28 08:42:20,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:42:20,639 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:42:20,639 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:42:20,639 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:42:20,640 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:41:13" (3/4) ... [2021-10-28 08:42:20,643 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 08:42:20,650 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 08:42:20,650 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 08:42:20,651 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-10-28 08:42:20,651 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 08:42:20,651 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-10-28 08:42:20,651 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-10-28 08:42:20,651 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-10-28 08:42:20,657 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-28 08:42:20,657 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-28 08:42:20,658 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 08:42:20,658 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:42:20,700 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:42:20,700 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:42:20,702 INFO L168 Benchmark]: Toolchain (without parser) took 68184.40 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 64.8 MB in the beginning and 67.1 MB in the end (delta: -2.3 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:42:20,702 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 102.8 MB. Free memory is still 81.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:42:20,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.80 ms. Allocated memory is still 102.8 MB. Free memory was 64.6 MB in the beginning and 77.1 MB in the end (delta: -12.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:42:20,703 INFO L168 Benchmark]: Boogie Preprocessor took 45.14 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 75.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:42:20,703 INFO L168 Benchmark]: RCFGBuilder took 591.79 ms. Allocated memory is still 102.8 MB. Free memory was 75.5 MB in the beginning and 62.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:42:20,704 INFO L168 Benchmark]: TraceAbstraction took 67145.12 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 61.6 MB in the beginning and 70.3 MB in the end (delta: -8.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2021-10-28 08:42:20,704 INFO L168 Benchmark]: Witness Printer took 61.41 ms. Allocated memory is still 123.7 MB. Free memory was 70.3 MB in the beginning and 67.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:42:20,706 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 102.8 MB. Free memory is still 81.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.80 ms. Allocated memory is still 102.8 MB. Free memory was 64.6 MB in the beginning and 77.1 MB in the end (delta: -12.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.14 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 75.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 591.79 ms. Allocated memory is still 102.8 MB. Free memory was 75.5 MB in the beginning and 62.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 67145.12 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 61.6 MB in the beginning and 70.3 MB in the end (delta: -8.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Witness Printer took 61.41 ms. Allocated memory is still 123.7 MB. Free memory was 70.3 MB in the beginning and 67.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 67.0s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 40.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 753 SDtfs, 2879 SDslu, 1597 SDs, 0 SdLazy, 10492 SolverSat, 1915 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 10.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1018 GetRequests, 536 SyntacticMatches, 25 SemanticMatches, 457 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3199 ImplicationChecksByTransitivity, 42.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=17, InterpolantAutomatonStates: 290, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 243 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 22.0s InterpolantComputationTime, 1152 NumberOfCodeBlocks, 1152 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1125 ConstructedInterpolants, 101 QuantifiedInterpolants, 6935 SizeOfPredicates, 83 NumberOfNonLiveVariables, 2254 ConjunctsInSsa, 234 ConjunctsInUnsatCore, 27 InterpolantComputations, 11 PerfectInterpolantSequences, 255/416 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! [2021-10-28 08:42:20,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33fb1603-4e75-4d4e-8e6c-7ab6ee15a325/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...