./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:06:14,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:06:14,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:06:14,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:06:14,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:06:14,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:06:14,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:06:14,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:06:14,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:06:14,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:06:14,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:06:14,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:06:14,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:06:14,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:06:14,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:06:14,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:06:14,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:06:14,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:06:14,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:06:14,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:06:14,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:06:14,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:06:14,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:06:14,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:06:14,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:06:14,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:06:14,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:06:14,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:06:14,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:06:14,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:06:14,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:06:14,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:06:14,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:06:14,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:06:14,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:06:14,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:06:14,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:06:14,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:06:14,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:06:14,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:06:14,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:06:14,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-13 01:06:14,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:06:14,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:06:14,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:06:14,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:06:14,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:06:14,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:06:14,267 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:06:14,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:06:14,268 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:06:14,268 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:06:14,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:06:14,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:06:14,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:06:14,271 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 01:06:14,271 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 01:06:14,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:06:14,272 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 01:06:14,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:06:14,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:06:14,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:06:14,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:06:14,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:06:14,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:06:14,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:06:14,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:06:14,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:06:14,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:06:14,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:06:14,276 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_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 [2021-10-13 01:06:14,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:06:14,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:06:14,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:06:14,703 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:06:14,705 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:06:14,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2021-10-13 01:06:14,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/data/43d8d3d6a/592c65ec37d6464fa718b118d2493504/FLAG589b18105 [2021-10-13 01:06:15,601 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:06:15,602 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2021-10-13 01:06:15,617 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/data/43d8d3d6a/592c65ec37d6464fa718b118d2493504/FLAG589b18105 [2021-10-13 01:06:15,828 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/data/43d8d3d6a/592c65ec37d6464fa718b118d2493504 [2021-10-13 01:06:15,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:06:15,833 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 01:06:15,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:06:15,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:06:15,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:06:15,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:06:15" (1/1) ... [2021-10-13 01:06:15,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2796f429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:15, skipping insertion in model container [2021-10-13 01:06:15,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:06:15" (1/1) ... [2021-10-13 01:06:15,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:06:15,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:06:16,357 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_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-10-13 01:06:16,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:06:16,383 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:06:16,465 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_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-10-13 01:06:16,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:06:16,503 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:06:16,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:16 WrapperNode [2021-10-13 01:06:16,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:06:16,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:06:16,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:06:16,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:06:16,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:16" (1/1) ... [2021-10-13 01:06:16,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:16" (1/1) ... [2021-10-13 01:06:16,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:16" (1/1) ... [2021-10-13 01:06:16,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:16" (1/1) ... [2021-10-13 01:06:16,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:16" (1/1) ... [2021-10-13 01:06:16,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:16" (1/1) ... [2021-10-13 01:06:16,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:16" (1/1) ... [2021-10-13 01:06:16,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:06:16,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:06:16,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:06:16,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:06:16,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:16" (1/1) ... [2021-10-13 01:06:16,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:06:16,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:06:16,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:06:16,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:06:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 01:06:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:06:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 01:06:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 01:06:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 01:06:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-13 01:06:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-10-13 01:06:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2021-10-13 01:06:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-10-13 01:06:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 01:06:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 01:06:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 01:06:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 01:06:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 01:06:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 01:06:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:06:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 01:06:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 01:06:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 01:06:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 01:06:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 01:06:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 01:06:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 01:06:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 01:06:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 01:06:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 01:06:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 01:06:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 01:06:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 01:06:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 01:06:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 01:06:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 01:06:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 01:06:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 01:06:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 01:06:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 01:06:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 01:06:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 01:06:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 01:06:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 01:06:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 01:06:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 01:06:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 01:06:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 01:06:16,745 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 01:06:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 01:06:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 01:06:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 01:06:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 01:06:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 01:06:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 01:06:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 01:06:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 01:06:16,746 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 01:06:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 01:06:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 01:06:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 01:06:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 01:06:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 01:06:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 01:06:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 01:06:16,747 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 01:06:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 01:06:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 01:06:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 01:06:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 01:06:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 01:06:16,748 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 01:06:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 01:06:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 01:06:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 01:06:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 01:06:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 01:06:16,749 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 01:06:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 01:06:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 01:06:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 01:06:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 01:06:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 01:06:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 01:06:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 01:06:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 01:06:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 01:06:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 01:06:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 01:06:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 01:06:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 01:06:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 01:06:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 01:06:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 01:06:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 01:06:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 01:06:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 01:06:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 01:06:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 01:06:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 01:06:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 01:06:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 01:06:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 01:06:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 01:06:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 01:06:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 01:06:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 01:06:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 01:06:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 01:06:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 01:06:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 01:06:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 01:06:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 01:06:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 01:06:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 01:06:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 01:06:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 01:06:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 01:06:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 01:06:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 01:06:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 01:06:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 01:06:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 01:06:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 01:06:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 01:06:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-13 01:06:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-10-13 01:06:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 01:06:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 01:06:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2021-10-13 01:06:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 01:06:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-10-13 01:06:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:06:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 01:06:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 01:06:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:06:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:06:16,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:06:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:06:17,076 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-13 01:06:17,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:06:17,310 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 01:06:17,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:06:17 BoogieIcfgContainer [2021-10-13 01:06:17,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:06:17,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:06:17,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:06:17,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:06:17,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:06:15" (1/3) ... [2021-10-13 01:06:17,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d870c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:06:17, skipping insertion in model container [2021-10-13 01:06:17,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:06:16" (2/3) ... [2021-10-13 01:06:17,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d870c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:06:17, skipping insertion in model container [2021-10-13 01:06:17,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:06:17" (3/3) ... [2021-10-13 01:06:17,324 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2021-10-13 01:06:17,331 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:06:17,331 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-10-13 01:06:17,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:06:17,396 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, mConcurrency=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 [2021-10-13 01:06:17,397 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-10-13 01:06:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 47 states have internal predecessors, (58), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:06:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 01:06:17,427 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:17,428 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:17,429 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:17,436 INFO L82 PathProgramCache]: Analyzing trace with hash 116076339, now seen corresponding path program 1 times [2021-10-13 01:06:17,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:17,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179812637] [2021-10-13 01:06:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:17,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:17,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:17,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:17,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179812637] [2021-10-13 01:06:17,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179812637] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:06:17,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:06:17,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:06:17,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282647261] [2021-10-13 01:06:17,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:06:17,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:06:17,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:06:17,854 INFO L87 Difference]: Start difference. First operand has 59 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 47 states have internal predecessors, (58), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:06:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:18,106 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-10-13 01:06:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:06:18,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-13 01:06:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:18,121 INFO L225 Difference]: With dead ends: 86 [2021-10-13 01:06:18,121 INFO L226 Difference]: Without dead ends: 77 [2021-10-13 01:06:18,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:06:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-13 01:06:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2021-10-13 01:06:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 53 states have internal predecessors, (59), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:06:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2021-10-13 01:06:18,171 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 12 [2021-10-13 01:06:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:18,172 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2021-10-13 01:06:18,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:06:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2021-10-13 01:06:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 01:06:18,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:18,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:18,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:06:18,174 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:18,176 INFO L82 PathProgramCache]: Analyzing trace with hash -153533958, now seen corresponding path program 1 times [2021-10-13 01:06:18,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:18,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904982281] [2021-10-13 01:06:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:18,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:18,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:18,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:18,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904982281] [2021-10-13 01:06:18,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904982281] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:06:18,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:06:18,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:06:18,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032518062] [2021-10-13 01:06:18,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:06:18,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:18,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:06:18,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:06:18,322 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:06:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:18,585 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-10-13 01:06:18,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:06:18,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-13 01:06:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:18,593 INFO L225 Difference]: With dead ends: 76 [2021-10-13 01:06:18,594 INFO L226 Difference]: Without dead ends: 76 [2021-10-13 01:06:18,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:06:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-13 01:06:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2021-10-13 01:06:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 52 states have internal predecessors, (58), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:06:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-10-13 01:06:18,631 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 14 [2021-10-13 01:06:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:18,632 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-10-13 01:06:18,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:06:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-10-13 01:06:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 01:06:18,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:18,635 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:18,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 01:06:18,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:18,639 INFO L82 PathProgramCache]: Analyzing trace with hash -153533957, now seen corresponding path program 1 times [2021-10-13 01:06:18,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:18,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500094210] [2021-10-13 01:06:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:18,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:18,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:18,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:18,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500094210] [2021-10-13 01:06:18,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500094210] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:06:18,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:06:18,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:06:18,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613098063] [2021-10-13 01:06:18,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:06:18,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:06:18,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:06:18,772 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:06:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:19,029 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-10-13 01:06:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:06:19,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-13 01:06:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:19,033 INFO L225 Difference]: With dead ends: 75 [2021-10-13 01:06:19,034 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 01:06:19,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:06:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 01:06:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2021-10-13 01:06:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 51 states have internal predecessors, (57), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:06:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-10-13 01:06:19,063 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 14 [2021-10-13 01:06:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:19,063 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-10-13 01:06:19,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:06:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-10-13 01:06:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 01:06:19,065 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:19,065 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:19,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 01:06:19,066 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:19,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:19,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1624967577, now seen corresponding path program 1 times [2021-10-13 01:06:19,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:19,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997202757] [2021-10-13 01:06:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:19,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:19,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:19,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:19,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:19,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997202757] [2021-10-13 01:06:19,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997202757] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:06:19,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:06:19,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:06:19,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571929027] [2021-10-13 01:06:19,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:06:19,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:06:19,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:06:19,423 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:06:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:20,260 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-10-13 01:06:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:06:20,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-13 01:06:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:20,265 INFO L225 Difference]: With dead ends: 86 [2021-10-13 01:06:20,265 INFO L226 Difference]: Without dead ends: 86 [2021-10-13 01:06:20,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 500.5ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-10-13 01:06:20,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-13 01:06:20,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2021-10-13 01:06:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 55 states have internal predecessors, (61), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:06:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-13 01:06:20,290 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 20 [2021-10-13 01:06:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:20,290 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-13 01:06:20,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:06:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-13 01:06:20,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 01:06:20,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:20,293 INFO L512 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] [2021-10-13 01:06:20,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 01:06:20,294 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:20,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:20,295 INFO L82 PathProgramCache]: Analyzing trace with hash 454825470, now seen corresponding path program 1 times [2021-10-13 01:06:20,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:20,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599991329] [2021-10-13 01:06:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:20,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:20,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:20,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:20,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:20,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599991329] [2021-10-13 01:06:20,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599991329] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:06:20,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:06:20,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:06:20,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973575093] [2021-10-13 01:06:20,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:06:20,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:06:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:06:20,566 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:06:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:21,223 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-10-13 01:06:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:06:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-13 01:06:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:21,227 INFO L225 Difference]: With dead ends: 92 [2021-10-13 01:06:21,227 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 01:06:21,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:06:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 01:06:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2021-10-13 01:06:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 57 states have internal predecessors, (65), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:06:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-10-13 01:06:21,234 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 24 [2021-10-13 01:06:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:21,235 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-10-13 01:06:21,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:06:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-10-13 01:06:21,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 01:06:21,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:21,237 INFO L512 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] [2021-10-13 01:06:21,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 01:06:21,237 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:21,238 INFO L82 PathProgramCache]: Analyzing trace with hash 454825471, now seen corresponding path program 1 times [2021-10-13 01:06:21,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:21,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518656920] [2021-10-13 01:06:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:21,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:21,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:21,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:21,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:21,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518656920] [2021-10-13 01:06:21,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518656920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:21,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306292696] [2021-10-13 01:06:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:21,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:06:21,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:06:21,385 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:06:21,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:06:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:21,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 01:06:21,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:06:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:21,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306292696] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:21,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:06:21,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-13 01:06:21,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639855207] [2021-10-13 01:06:21,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:06:21,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:06:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:06:21,753 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:06:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:22,274 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2021-10-13 01:06:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:06:22,275 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-10-13 01:06:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:22,277 INFO L225 Difference]: With dead ends: 94 [2021-10-13 01:06:22,278 INFO L226 Difference]: Without dead ends: 88 [2021-10-13 01:06:22,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:06:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-13 01:06:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-10-13 01:06:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.375) internal successors, (55), 48 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:06:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-10-13 01:06:22,286 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 24 [2021-10-13 01:06:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:22,287 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-10-13 01:06:22,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:06:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-10-13 01:06:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 01:06:22,289 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:22,289 INFO L512 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] [2021-10-13 01:06:22,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:06:22,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:06:22,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2135191018, now seen corresponding path program 2 times [2021-10-13 01:06:22,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:22,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496181305] [2021-10-13 01:06:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:22,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:22,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:22,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:22,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:22,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496181305] [2021-10-13 01:06:22,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496181305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:22,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573971622] [2021-10-13 01:06:22,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:06:22,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:06:22,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:06:22,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:06:22,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 01:06:22,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:06:22,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:06:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:06:22,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:06:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:23,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573971622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:23,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:06:23,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-10-13 01:06:23,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023637256] [2021-10-13 01:06:23,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:06:23,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:06:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:06:23,036 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:06:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:23,455 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2021-10-13 01:06:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:06:23,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-10-13 01:06:23,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:23,459 INFO L225 Difference]: With dead ends: 95 [2021-10-13 01:06:23,460 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 01:06:23,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:06:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 01:06:23,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-10-13 01:06:23,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 52 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:06:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-10-13 01:06:23,469 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 28 [2021-10-13 01:06:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:23,471 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-10-13 01:06:23,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:06:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-10-13 01:06:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 01:06:23,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:23,476 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:23,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:06:23,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-13 01:06:23,696 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:23,697 INFO L82 PathProgramCache]: Analyzing trace with hash -746509651, now seen corresponding path program 3 times [2021-10-13 01:06:23,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:23,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331156791] [2021-10-13 01:06:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:23,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:23,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:23,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 01:06:23,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:23,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331156791] [2021-10-13 01:06:23,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331156791] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:06:23,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:06:23,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:06:23,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656406293] [2021-10-13 01:06:23,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:06:23,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:23,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:06:23,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:06:23,916 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:06:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:24,467 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-10-13 01:06:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:06:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-10-13 01:06:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:24,469 INFO L225 Difference]: With dead ends: 79 [2021-10-13 01:06:24,470 INFO L226 Difference]: Without dead ends: 79 [2021-10-13 01:06:24,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:06:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-13 01:06:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-10-13 01:06:24,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 52 states have internal predecessors, (58), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:06:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-10-13 01:06:24,475 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 32 [2021-10-13 01:06:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:24,475 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-10-13 01:06:24,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:06:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-10-13 01:06:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 01:06:24,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:24,477 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:24,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 01:06:24,478 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash 71636682, now seen corresponding path program 1 times [2021-10-13 01:06:24,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:24,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018075205] [2021-10-13 01:06:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:24,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:24,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:24,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 01:06:24,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:24,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018075205] [2021-10-13 01:06:24,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018075205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:24,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967437254] [2021-10-13 01:06:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:24,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:06:24,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:06:24,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:06:24,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 01:06:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:24,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 01:06:24,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:06:25,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:06:25,103 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:06:25,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 01:06:25,177 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 17 treesize of output 13 [2021-10-13 01:06:25,518 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 22 treesize of output 14 [2021-10-13 01:06:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:06:25,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967437254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:25,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:06:25,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-10-13 01:06:25,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341490896] [2021-10-13 01:06:25,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 01:06:25,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:25,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 01:06:25,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-10-13 01:06:25,553 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:06:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:26,457 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-10-13 01:06:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:06:26,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-10-13 01:06:26,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:26,459 INFO L225 Difference]: With dead ends: 88 [2021-10-13 01:06:26,459 INFO L226 Difference]: Without dead ends: 88 [2021-10-13 01:06:26,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 722.0ms TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 01:06:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-13 01:06:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2021-10-13 01:06:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 55 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:06:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-10-13 01:06:26,463 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 35 [2021-10-13 01:06:26,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:26,464 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-10-13 01:06:26,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:06:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-10-13 01:06:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 01:06:26,465 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:26,465 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:26,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:06:26,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:06:26,676 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:26,676 INFO L82 PathProgramCache]: Analyzing trace with hash 71636683, now seen corresponding path program 1 times [2021-10-13 01:06:26,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:26,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252097939] [2021-10-13 01:06:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:26,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:26,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:26,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:06:27,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:27,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252097939] [2021-10-13 01:06:27,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252097939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:27,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831995633] [2021-10-13 01:06:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:27,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:06:27,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:06:27,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:06:27,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 01:06:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:27,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-13 01:06:27,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:06:27,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:06:27,334 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:06:27,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 01:06:27,407 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 11 treesize of output 7 [2021-10-13 01:06:27,415 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 17 treesize of output 13 [2021-10-13 01:06:27,860 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 36 treesize of output 28 [2021-10-13 01:06:27,866 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 25 treesize of output 17 [2021-10-13 01:06:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:06:27,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831995633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:27,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:06:27,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-10-13 01:06:27,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685379247] [2021-10-13 01:06:27,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 01:06:27,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 01:06:27,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-10-13 01:06:27,910 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 23 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:06:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:28,783 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-10-13 01:06:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 01:06:28,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-10-13 01:06:28,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:28,785 INFO L225 Difference]: With dead ends: 85 [2021-10-13 01:06:28,785 INFO L226 Difference]: Without dead ends: 85 [2021-10-13 01:06:28,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 748.1ms TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-10-13 01:06:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-13 01:06:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2021-10-13 01:06:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 55 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:06:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-10-13 01:06:28,795 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 35 [2021-10-13 01:06:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:28,795 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-10-13 01:06:28,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:06:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-10-13 01:06:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 01:06:28,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:28,797 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:28,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:06:29,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 01:06:29,028 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:29,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:29,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1444078125, now seen corresponding path program 1 times [2021-10-13 01:06:29,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:29,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843819201] [2021-10-13 01:06:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:29,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:29,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:29,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:29,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-13 01:06:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 01:06:29,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:29,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843819201] [2021-10-13 01:06:29,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843819201] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:06:29,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:06:29,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-13 01:06:29,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175741074] [2021-10-13 01:06:29,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:06:29,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:06:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:06:29,228 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:06:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:29,624 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2021-10-13 01:06:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:06:29,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-10-13 01:06:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:29,626 INFO L225 Difference]: With dead ends: 81 [2021-10-13 01:06:29,626 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 01:06:29,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 223.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:06:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 01:06:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2021-10-13 01:06:29,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.297872340425532) internal successors, (61), 55 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:06:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-10-13 01:06:29,630 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 37 [2021-10-13 01:06:29,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:29,630 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-10-13 01:06:29,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:06:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-10-13 01:06:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 01:06:29,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:29,632 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:29,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 01:06:29,632 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash -470331924, now seen corresponding path program 2 times [2021-10-13 01:06:29,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:29,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332997681] [2021-10-13 01:06:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:29,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:29,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:29,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:30,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:30,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332997681] [2021-10-13 01:06:30,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332997681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:30,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943807111] [2021-10-13 01:06:30,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:06:30,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:06:30,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:06:30,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:06:30,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 01:06:30,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:06:30,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:06:30,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 01:06:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:06:30,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:06:30,360 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 01:06:30,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-13 01:06:30,431 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 21 treesize of output 17 [2021-10-13 01:06:30,586 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-10-13 01:06:30,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-10-13 01:06:30,763 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:06:30,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2021-10-13 01:06:30,782 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 11 treesize of output 7 [2021-10-13 01:06:31,438 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 77 treesize of output 69 [2021-10-13 01:06:31,725 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:06:31,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2021-10-13 01:06:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:31,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943807111] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:31,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:06:31,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-10-13 01:06:31,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402354412] [2021-10-13 01:06:31,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 01:06:31,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 01:06:31,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 01:06:31,966 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:06:33,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:33,733 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-10-13 01:06:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 01:06:33,734 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-10-13 01:06:33,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:33,735 INFO L225 Difference]: With dead ends: 94 [2021-10-13 01:06:33,735 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 01:06:33,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1720.6ms TimeCoverageRelationStatistics Valid=296, Invalid=2154, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 01:06:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 01:06:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2021-10-13 01:06:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.32) internal successors, (66), 58 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:06:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2021-10-13 01:06:33,741 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 38 [2021-10-13 01:06:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:33,741 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2021-10-13 01:06:33,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:06:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2021-10-13 01:06:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 01:06:33,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:33,743 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:33,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:06:33,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-13 01:06:33,952 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:33,953 INFO L82 PathProgramCache]: Analyzing trace with hash -470331923, now seen corresponding path program 2 times [2021-10-13 01:06:33,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:33,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425929671] [2021-10-13 01:06:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:33,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:34,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:34,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:34,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:34,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425929671] [2021-10-13 01:06:34,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425929671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:34,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163387097] [2021-10-13 01:06:34,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:06:34,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:06:34,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:06:34,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:06:34,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 01:06:34,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:06:34,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:06:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-13 01:06:34,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:06:34,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:06:34,963 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 01:06:34,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-13 01:06:34,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-10-13 01:06:35,095 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 42 treesize of output 38 [2021-10-13 01:06:35,102 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 39 treesize of output 35 [2021-10-13 01:06:35,265 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-10-13 01:06:35,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 40 [2021-10-13 01:06:35,306 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 01:06:35,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-10-13 01:06:35,466 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:06:35,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 61 [2021-10-13 01:06:35,478 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 01:06:35,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 82 [2021-10-13 01:06:36,666 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-10-13 01:06:36,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 68 [2021-10-13 01:06:36,682 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-13 01:06:36,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 45 [2021-10-13 01:06:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:37,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163387097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:37,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:06:37,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 39 [2021-10-13 01:06:37,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362589866] [2021-10-13 01:06:37,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 01:06:37,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:37,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 01:06:37,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 01:06:37,012 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 40 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 34 states have internal predecessors, (59), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:06:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:41,181 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2021-10-13 01:06:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 01:06:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 34 states have internal predecessors, (59), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-10-13 01:06:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:41,183 INFO L225 Difference]: With dead ends: 91 [2021-10-13 01:06:41,183 INFO L226 Difference]: Without dead ends: 91 [2021-10-13 01:06:41,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 4066.5ms TimeCoverageRelationStatistics Valid=386, Invalid=3154, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 01:06:41,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-13 01:06:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-10-13 01:06:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.3) internal successors, (65), 58 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:06:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-10-13 01:06:41,191 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 38 [2021-10-13 01:06:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:41,193 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-10-13 01:06:41,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 34 states have internal predecessors, (59), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:06:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-10-13 01:06:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 01:06:41,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:41,196 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:41,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 01:06:41,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-13 01:06:41,412 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:41,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1710101621, now seen corresponding path program 1 times [2021-10-13 01:06:41,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:41,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462339295] [2021-10-13 01:06:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:41,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:41,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:41,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:41,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-13 01:06:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:06:41,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:41,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462339295] [2021-10-13 01:06:41,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462339295] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:41,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288988490] [2021-10-13 01:06:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:41,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:06:41,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:06:41,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:06:41,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 01:06:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:42,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 01:06:42,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:06:42,136 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 16 treesize of output 12 [2021-10-13 01:06:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:06:42,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288988490] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:42,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:06:42,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-10-13 01:06:42,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192909651] [2021-10-13 01:06:42,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 01:06:42,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:06:42,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 01:06:42,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-10-13 01:06:42,549 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 01:06:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:06:49,520 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-10-13 01:06:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 01:06:49,524 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2021-10-13 01:06:49,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:06:49,525 INFO L225 Difference]: With dead ends: 84 [2021-10-13 01:06:49,525 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 01:06:49,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 685.2ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 01:06:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 01:06:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-10-13 01:06:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.28) internal successors, (64), 58 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:06:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-10-13 01:06:49,532 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 40 [2021-10-13 01:06:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:06:49,533 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-10-13 01:06:49,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 01:06:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-10-13 01:06:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 01:06:49,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:06:49,534 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:06:49,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:06:49,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 01:06:49,752 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:06:49,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:06:49,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1475007606, now seen corresponding path program 3 times [2021-10-13 01:06:49,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:06:49,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361950983] [2021-10-13 01:06:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:06:49,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:06:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:50,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:06:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:50,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:06:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:06:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:06:50,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:06:50,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361950983] [2021-10-13 01:06:50,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361950983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:06:50,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614180947] [2021-10-13 01:06:50,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 01:06:50,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:06:50,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:06:50,830 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:06:50,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 01:06:51,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 01:06:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:06:51,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-13 01:06:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:06:51,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:06:51,320 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 11 treesize of output 7 [2021-10-13 01:06:51,328 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 11 treesize of output 7 [2021-10-13 01:06:51,441 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 01:06:51,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-13 01:06:51,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:06:51,586 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:06:51,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-10-13 01:06:51,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:06:51,601 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 01:06:51,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2021-10-13 01:06:51,856 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 01:06:51,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-10-13 01:06:51,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:06:52,021 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-10-13 01:06:52,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 71 [2021-10-13 01:06:52,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:06:52,046 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-10-13 01:06:52,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 97 [2021-10-13 01:06:59,966 INFO L354 Elim1Store]: treesize reduction 203, result has 6.5 percent of original size [2021-10-13 01:06:59,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 175 treesize of output 107 [2021-10-13 01:07:00,030 INFO L354 Elim1Store]: treesize reduction 159, result has 5.9 percent of original size [2021-10-13 01:07:00,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 58 [2021-10-13 01:07:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 23 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:07:00,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614180947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:07:00,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:07:00,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 44 [2021-10-13 01:07:00,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138150234] [2021-10-13 01:07:00,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 01:07:00,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:07:00,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 01:07:00,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1789, Unknown=3, NotChecked=0, Total=1892 [2021-10-13 01:07:00,171 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 44 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:07:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:07:43,174 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2021-10-13 01:07:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 01:07:43,175 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-10-13 01:07:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:07:43,176 INFO L225 Difference]: With dead ends: 117 [2021-10-13 01:07:43,176 INFO L226 Difference]: Without dead ends: 117 [2021-10-13 01:07:43,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 26695.1ms TimeCoverageRelationStatistics Valid=308, Invalid=4238, Unknown=10, NotChecked=0, Total=4556 [2021-10-13 01:07:43,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-13 01:07:43,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2021-10-13 01:07:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 79 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-13 01:07:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-10-13 01:07:43,184 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 41 [2021-10-13 01:07:43,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:07:43,185 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-10-13 01:07:43,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:07:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-10-13 01:07:43,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 01:07:43,186 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:07:43,187 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:07:43,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:07:43,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:07:43,409 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:07:43,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:07:43,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1710554477, now seen corresponding path program 2 times [2021-10-13 01:07:43,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:07:43,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863134551] [2021-10-13 01:07:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:07:43,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:07:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:43,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:07:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:43,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:07:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:43,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-13 01:07:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 01:07:43,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:07:43,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863134551] [2021-10-13 01:07:43,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863134551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:07:43,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782982056] [2021-10-13 01:07:43,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:07:43,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:07:43,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:07:43,656 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:07:43,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 01:07:44,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:07:44,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:07:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 01:07:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:07:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 01:07:44,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782982056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:07:44,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:07:44,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-10-13 01:07:44,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754623593] [2021-10-13 01:07:44,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:07:44,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:07:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:07:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:07:44,327 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:07:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:07:44,878 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2021-10-13 01:07:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:07:44,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-10-13 01:07:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:07:44,881 INFO L225 Difference]: With dead ends: 128 [2021-10-13 01:07:44,881 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 01:07:44,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:07:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 01:07:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 107. [2021-10-13 01:07:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 92 states have internal predecessors, (99), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-13 01:07:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2021-10-13 01:07:44,890 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 43 [2021-10-13 01:07:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:07:44,891 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2021-10-13 01:07:44,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:07:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2021-10-13 01:07:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 01:07:44,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:07:44,893 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-10-13 01:07:44,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 01:07:45,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:07:45,120 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_destroyErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:07:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:07:45,121 INFO L82 PathProgramCache]: Analyzing trace with hash 660848846, now seen corresponding path program 1 times [2021-10-13 01:07:45,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:07:45,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037029464] [2021-10-13 01:07:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:07:45,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:07:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:45,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:07:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:45,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:07:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:45,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-13 01:07:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 01:07:45,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:07:45,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037029464] [2021-10-13 01:07:45,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037029464] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:07:45,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:07:45,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:07:45,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418565617] [2021-10-13 01:07:45,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:07:45,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:07:45,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:07:45,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:07:45,302 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:07:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:07:45,731 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2021-10-13 01:07:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:07:45,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2021-10-13 01:07:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:07:45,733 INFO L225 Difference]: With dead ends: 120 [2021-10-13 01:07:45,733 INFO L226 Difference]: Without dead ends: 120 [2021-10-13 01:07:45,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:07:45,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-13 01:07:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-10-13 01:07:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 93 states have internal predecessors, (102), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-13 01:07:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2021-10-13 01:07:45,741 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 46 [2021-10-13 01:07:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:07:45,742 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2021-10-13 01:07:45,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:07:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2021-10-13 01:07:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 01:07:45,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:07:45,744 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-10-13 01:07:45,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 01:07:45,744 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_destroyErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:07:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:07:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash 660848847, now seen corresponding path program 1 times [2021-10-13 01:07:45,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:07:45,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797940648] [2021-10-13 01:07:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:07:45,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:07:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:45,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:07:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:45,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:07:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:45,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-13 01:07:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 01:07:45,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:07:45,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797940648] [2021-10-13 01:07:45,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797940648] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:07:45,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:07:45,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:07:45,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073328006] [2021-10-13 01:07:45,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:07:45,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:07:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:07:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:07:45,964 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:07:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:07:46,421 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2021-10-13 01:07:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:07:46,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2021-10-13 01:07:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:07:46,426 INFO L225 Difference]: With dead ends: 115 [2021-10-13 01:07:46,426 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 01:07:46,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:07:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 01:07:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2021-10-13 01:07:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 95 states have internal predecessors, (103), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-13 01:07:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-10-13 01:07:46,449 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 46 [2021-10-13 01:07:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:07:46,450 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-10-13 01:07:46,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:07:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-10-13 01:07:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 01:07:46,451 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:07:46,452 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:07:46,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 01:07:46,452 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:07:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:07:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1493663661, now seen corresponding path program 4 times [2021-10-13 01:07:46,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:07:46,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877428652] [2021-10-13 01:07:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:07:46,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:07:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:46,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:07:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:46,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-13 01:07:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:07:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 01:07:46,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:07:46,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877428652] [2021-10-13 01:07:46,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877428652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:07:46,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118359905] [2021-10-13 01:07:46,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 01:07:46,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:07:46,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:07:46,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:07:46,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 01:07:47,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 01:07:47,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:07:47,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:07:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:07:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 01:07:47,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118359905] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:07:47,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:07:47,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-10-13 01:07:47,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166451593] [2021-10-13 01:07:47,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:07:47,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:07:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:07:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:07:47,483 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:07:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:07:47,879 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2021-10-13 01:07:47,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:07:47,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-10-13 01:07:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:07:47,881 INFO L225 Difference]: With dead ends: 121 [2021-10-13 01:07:47,881 INFO L226 Difference]: Without dead ends: 121 [2021-10-13 01:07:47,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:07:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-13 01:07:47,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2021-10-13 01:07:47,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 91 states have internal predecessors, (100), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-13 01:07:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2021-10-13 01:07:47,888 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 45 [2021-10-13 01:07:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:07:47,888 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2021-10-13 01:07:47,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:07:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2021-10-13 01:07:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 01:07:47,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:07:47,889 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:07:47,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 01:07:48,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:07:48,090 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-13 01:07:48,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:07:48,091 INFO L82 PathProgramCache]: Analyzing trace with hash 212662197, now seen corresponding path program 3 times [2021-10-13 01:07:48,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:07:48,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11443637] [2021-10-13 01:07:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:07:48,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:07:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:07:48,117 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:07:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:07:48,176 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:07:48,177 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 01:07:48,178 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 01:07:48,180 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr0REQUIRES_VIOLATION [2021-10-13 01:07:48,181 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr1REQUIRES_VIOLATION [2021-10-13 01:07:48,181 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:07:48,181 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:07:48,182 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:07:48,182 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr0REQUIRES_VIOLATION [2021-10-13 01:07:48,182 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr1REQUIRES_VIOLATION [2021-10-13 01:07:48,182 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr0REQUIRES_VIOLATION [2021-10-13 01:07:48,182 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr1REQUIRES_VIOLATION [2021-10-13 01:07:48,183 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 01:07:48,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-13 01:07:48,192 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:07:48,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:07:48 BoogieIcfgContainer [2021-10-13 01:07:48,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:07:48,258 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:07:48,259 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:07:48,259 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:07:48,259 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:06:17" (3/4) ... [2021-10-13 01:07:48,262 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 01:07:48,349 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 01:07:48,349 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:07:48,350 INFO L168 Benchmark]: Toolchain (without parser) took 92516.76 ms. Allocated memory was 88.1 MB in the beginning and 167.8 MB in the end (delta: 79.7 MB). Free memory was 49.9 MB in the beginning and 102.2 MB in the end (delta: -52.3 MB). Peak memory consumption was 25.8 MB. Max. memory is 16.1 GB. [2021-10-13 01:07:48,351 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory is still 67.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:07:48,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 664.63 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 49.7 MB in the beginning and 75.8 MB in the end (delta: -26.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 01:07:48,352 INFO L168 Benchmark]: Boogie Preprocessor took 115.89 ms. Allocated memory is still 107.0 MB. Free memory was 75.8 MB in the beginning and 73.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:07:48,352 INFO L168 Benchmark]: RCFGBuilder took 690.49 ms. Allocated memory is still 107.0 MB. Free memory was 72.7 MB in the beginning and 53.0 MB in the end (delta: 19.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 01:07:48,353 INFO L168 Benchmark]: TraceAbstraction took 90942.94 ms. Allocated memory was 107.0 MB in the beginning and 167.8 MB in the end (delta: 60.8 MB). Free memory was 52.2 MB in the beginning and 105.4 MB in the end (delta: -53.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:07:48,353 INFO L168 Benchmark]: Witness Printer took 90.71 ms. Allocated memory is still 167.8 MB. Free memory was 105.4 MB in the beginning and 102.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:07:48,355 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory is still 67.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 664.63 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 49.7 MB in the beginning and 75.8 MB in the end (delta: -26.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 115.89 ms. Allocated memory is still 107.0 MB. Free memory was 75.8 MB in the beginning and 73.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 690.49 ms. Allocated memory is still 107.0 MB. Free memory was 72.7 MB in the beginning and 53.0 MB in the end (delta: 19.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 90942.94 ms. Allocated memory was 107.0 MB in the beginning and 167.8 MB in the end (delta: 60.8 MB). Free memory was 52.2 MB in the beginning and 105.4 MB in the end (delta: -53.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Witness Printer took 90.71 ms. Allocated memory is still 167.8 MB. Free memory was 105.4 MB in the beginning and 102.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 613]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L603] int len = 2; VAL [len=2] [L604] len < 32 && __VERIFIER_nondet_int() [L604] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L607] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L575] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, new_head={-1:0}] [L581] new_head->next = head VAL [\old(len)=3, head={0:0}, len=3, new_head={-1:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-1:0}, len=2, new_head={-1:0}] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=2, new_head={-2:0}] [L581] new_head->next = head VAL [\old(len)=3, head={-1:0}, len=2, new_head={-2:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-2:0}, len=1, new_head={-2:0}] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=1, new_head={-3:0}] [L581] new_head->next = head VAL [\old(len)=3, head={-2:0}, len=1, new_head={-3:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-3:0}, len=0, new_head={-3:0}] [L576] COND FALSE !(len > 0) VAL [\old(len)=3, head={-3:0}, len=0, new_head={-3:0}] [L585] return head; VAL [\old(len)=3, \result={-3:0}, head={-3:0}, len=0, new_head={-3:0}] [L607] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={-3:0}] [L607] SLL s = sll_create(len + 1); [L608] CALL, EXPR sll_length(s) VAL [head={-3:0}] [L588] int len = 0; VAL [head={-3:0}, head={-3:0}, len=0] [L589] COND TRUE \read(head) [L590] len++ VAL [head={-3:0}, head={-3:0}, len=1] [L591] EXPR head->next VAL [head={-3:0}, head={-3:0}, head->next={-2:0}, len=1] [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ VAL [head={-2:0}, head={-3:0}, len=2] [L591] EXPR head->next VAL [head={-3:0}, head={-2:0}, head->next={-1:0}, len=2] [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ VAL [head={-3:0}, head={-1:0}, len=3] [L591] EXPR head->next VAL [head={-3:0}, head={-1:0}, head->next={0:0}, len=3] [L591] head = head->next [L589] COND FALSE !(\read(head)) VAL [head={0:0}, head={-3:0}, len=3] [L593] return len; VAL [\result=3, head={-3:0}, head={0:0}, len=3] [L608] RET, EXPR sll_length(s) VAL [len=2, s={-3:0}, sll_length(s)=3] [L608] COND TRUE len != sll_length(s) [L613] reach_error() VAL [len=2, s={-3:0}] - UnprovableResult [Line: 597]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 69 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 90802.4ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 41.1ms, AutomataDifference: 63812.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 761 SDtfs, 2112 SDslu, 2593 SDs, 0 SdLazy, 10953 SolverSat, 410 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 35922.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 781 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 37424.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=18, InterpolantAutomatonStates: 243, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 220.5ms AutomataMinimizationTime, 19 MinimizatonAttempts, 351 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 181.5ms SsaConstructionTime, 766.6ms SatisfiabilityAnalysisTime, 20538.5ms InterpolantComputationTime, 1025 NumberOfCodeBlocks, 1022 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 950 ConstructedInterpolants, 35 QuantifiedInterpolants, 11130 SizeOfPredicates, 104 NumberOfNonLiveVariables, 2089 ConjunctsInSsa, 349 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 265/459 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 01:07:48,571 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-13 01:07:48,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a133df2-ce3d-4e42-a22b-00b8aa5fa6cd/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...