./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/tree-4.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_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/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_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/tree-4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/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_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/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 925bf64e647f08edad293233522d90c39c43645d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 01:22:30,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:22:30,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:22:30,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:22:30,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:22:30,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:22:30,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:22:30,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:22:30,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:22:30,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:22:30,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:22:30,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:22:30,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:22:30,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:22:30,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:22:30,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:22:30,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:22:30,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:22:30,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:22:30,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:22:30,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:22:30,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:22:30,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:22:30,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:22:30,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:22:30,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:22:30,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:22:30,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:22:30,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:22:30,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:22:30,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:22:30,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:22:30,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:22:30,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:22:30,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:22:30,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:22:30,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:22:30,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:22:30,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:22:30,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:22:30,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:22:30,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-13 01:22:30,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:22:30,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:22:30,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:22:30,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:22:30,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:22:30,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:22:30,293 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:22:30,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:22:30,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:22:30,294 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:22:30,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:22:30,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:22:30,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:22:30,296 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 01:22:30,296 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 01:22:30,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:22:30,297 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 01:22:30,297 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:22:30,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:22:30,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:22:30,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:22:30,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:22:30,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:22:30,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:22:30,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:22:30,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:22:30,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:22:30,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:22:30,300 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_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 925bf64e647f08edad293233522d90c39c43645d [2021-10-13 01:22:30,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:22:30,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:22:30,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:22:30,591 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:22:30,592 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:22:30,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/heap-manipulation/tree-4.i [2021-10-13 01:22:30,658 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/data/d9ffee0b7/f5b4394d1a264f96bfdc3d6d0c38275b/FLAGf9ecfb785 [2021-10-13 01:22:31,172 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:22:31,173 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/sv-benchmarks/c/heap-manipulation/tree-4.i [2021-10-13 01:22:31,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/data/d9ffee0b7/f5b4394d1a264f96bfdc3d6d0c38275b/FLAGf9ecfb785 [2021-10-13 01:22:31,473 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/data/d9ffee0b7/f5b4394d1a264f96bfdc3d6d0c38275b [2021-10-13 01:22:31,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:22:31,478 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 01:22:31,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:22:31,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:22:31,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:22:31,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:22:31" (1/1) ... [2021-10-13 01:22:31,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ed0b966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31, skipping insertion in model container [2021-10-13 01:22:31,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:22:31" (1/1) ... [2021-10-13 01:22:31,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:22:31,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:22:31,804 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_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/sv-benchmarks/c/heap-manipulation/tree-4.i[22626,22639] [2021-10-13 01:22:31,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:22:31,844 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:22:31,902 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_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/sv-benchmarks/c/heap-manipulation/tree-4.i[22626,22639] [2021-10-13 01:22:31,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:22:31,961 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:22:31,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31 WrapperNode [2021-10-13 01:22:31,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:22:31,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:22:31,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:22:31,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:22:31,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31" (1/1) ... [2021-10-13 01:22:31,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31" (1/1) ... [2021-10-13 01:22:32,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31" (1/1) ... [2021-10-13 01:22:32,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31" (1/1) ... [2021-10-13 01:22:32,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31" (1/1) ... [2021-10-13 01:22:32,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31" (1/1) ... [2021-10-13 01:22:32,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31" (1/1) ... [2021-10-13 01:22:32,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:22:32,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:22:32,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:22:32,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:22:32,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31" (1/1) ... [2021-10-13 01:22:32,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:22:32,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:22:32,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:22:32,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:22:32,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 01:22:32,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:22:32,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 01:22:32,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 01:22:32,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 01:22:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-10-13 01:22:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2021-10-13 01:22:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure create_tree [2021-10-13 01:22:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tree [2021-10-13 01:22:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 01:22:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 01:22:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 01:22:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 01:22:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 01:22:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 01:22:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:22:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 01:22:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 01:22:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 01:22:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 01:22:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 01:22:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 01:22:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 01:22:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 01:22:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 01:22:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 01:22:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 01:22:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 01:22:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 01:22:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 01:22:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 01:22:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 01:22:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 01:22:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 01:22:32,159 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 01:22:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 01:22:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 01:22:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 01:22:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 01:22:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 01:22:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 01:22:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 01:22:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 01:22:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 01:22:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 01:22:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 01:22:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 01:22:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 01:22:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 01:22:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 01:22:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 01:22:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 01:22:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 01:22:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 01:22:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 01:22:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 01:22:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 01:22:32,163 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 01:22:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 01:22:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 01:22:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 01:22:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 01:22:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 01:22:32,164 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 01:22:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 01:22:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 01:22:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 01:22:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 01:22:32,165 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 01:22:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 01:22:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 01:22:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 01:22:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 01:22:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 01:22:32,166 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 01:22:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 01:22:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 01:22:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 01:22:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 01:22:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 01:22:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 01:22:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 01:22:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 01:22:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 01:22:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 01:22:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 01:22:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 01:22:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 01:22:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 01:22:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 01:22:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 01:22:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 01:22:32,169 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 01:22:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 01:22:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 01:22:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 01:22:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 01:22:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 01:22:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 01:22:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 01:22:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 01:22:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 01:22:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 01:22:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 01:22:32,171 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 01:22:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 01:22:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 01:22:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 01:22:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 01:22:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 01:22:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 01:22:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 01:22:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 01:22:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 01:22:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 01:22:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 01:22:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 01:22:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 01:22:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-10-13 01:22:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2021-10-13 01:22:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 01:22:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:22:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure create_tree [2021-10-13 01:22:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 01:22:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 01:22:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:22:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure free_tree [2021-10-13 01:22:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:22:32,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 01:22:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 01:22:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:22:32,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:22:32,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:22:32,868 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 01:22:32,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:22:32 BoogieIcfgContainer [2021-10-13 01:22:32,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:22:32,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:22:32,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:22:32,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:22:32,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:22:31" (1/3) ... [2021-10-13 01:22:32,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36801bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:22:32, skipping insertion in model container [2021-10-13 01:22:32,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:22:31" (2/3) ... [2021-10-13 01:22:32,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36801bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:22:32, skipping insertion in model container [2021-10-13 01:22:32,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:22:32" (3/3) ... [2021-10-13 01:22:32,879 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-4.i [2021-10-13 01:22:32,884 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:22:32,885 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2021-10-13 01:22:32,926 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:22:32,932 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 01:22:32,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2021-10-13 01:22:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 84 states have (on average 2.107142857142857) internal successors, (177), 152 states have internal predecessors, (177), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-13 01:22:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 01:22:32,984 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:32,985 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:32,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting create_treeErr8REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:32,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash -557652933, now seen corresponding path program 1 times [2021-10-13 01:22:33,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:33,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936172411] [2021-10-13 01:22:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:33,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:33,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:33,257 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 01:22:33,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:33,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936172411] [2021-10-13 01:22:33,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936172411] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:33,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:33,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:22:33,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856748496] [2021-10-13 01:22:33,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:22:33,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:22:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:22:33,298 INFO L87 Difference]: Start difference. First operand has 164 states, 84 states have (on average 2.107142857142857) internal successors, (177), 152 states have internal predecessors, (177), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 01:22:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:33,696 INFO L93 Difference]: Finished difference Result 216 states and 237 transitions. [2021-10-13 01:22:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:22:33,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 10 [2021-10-13 01:22:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:33,714 INFO L225 Difference]: With dead ends: 216 [2021-10-13 01:22:33,714 INFO L226 Difference]: Without dead ends: 211 [2021-10-13 01:22:33,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:22:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-13 01:22:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 169. [2021-10-13 01:22:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 91 states have (on average 1.901098901098901) internal successors, (173), 157 states have internal predecessors, (173), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:22:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2021-10-13 01:22:33,777 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 10 [2021-10-13 01:22:33,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:33,778 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2021-10-13 01:22:33,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 01:22:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2021-10-13 01:22:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 01:22:33,780 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:33,783 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:33,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:22:33,784 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting create_treeErr8REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:33,785 INFO L82 PathProgramCache]: Analyzing trace with hash -108387509, now seen corresponding path program 1 times [2021-10-13 01:22:33,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:33,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154833873] [2021-10-13 01:22:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:33,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:33,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:33,909 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 01:22:33,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:33,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154833873] [2021-10-13 01:22:33,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154833873] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:33,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:33,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:22:33,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494021482] [2021-10-13 01:22:33,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:22:33,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:22:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:22:33,914 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 01:22:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:34,332 INFO L93 Difference]: Finished difference Result 209 states and 227 transitions. [2021-10-13 01:22:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:22:34,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-10-13 01:22:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:34,336 INFO L225 Difference]: With dead ends: 209 [2021-10-13 01:22:34,336 INFO L226 Difference]: Without dead ends: 209 [2021-10-13 01:22:34,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:22:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-10-13 01:22:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 169. [2021-10-13 01:22:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 91 states have (on average 1.8571428571428572) internal successors, (169), 157 states have internal predecessors, (169), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:22:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 182 transitions. [2021-10-13 01:22:34,361 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 182 transitions. Word has length 11 [2021-10-13 01:22:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:34,361 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 182 transitions. [2021-10-13 01:22:34,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 01:22:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 182 transitions. [2021-10-13 01:22:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 01:22:34,362 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:34,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:34,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 01:22:34,363 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting create_treeErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash -108386450, now seen corresponding path program 1 times [2021-10-13 01:22:34,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:34,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111001330] [2021-10-13 01:22:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:34,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:34,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:34,509 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 01:22:34,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:34,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111001330] [2021-10-13 01:22:34,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111001330] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:34,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:34,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:22:34,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17520868] [2021-10-13 01:22:34,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:22:34,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:34,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:22:34,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:22:34,512 INFO L87 Difference]: Start difference. First operand 169 states and 182 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 01:22:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:34,865 INFO L93 Difference]: Finished difference Result 206 states and 225 transitions. [2021-10-13 01:22:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:22:34,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-10-13 01:22:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:34,868 INFO L225 Difference]: With dead ends: 206 [2021-10-13 01:22:34,868 INFO L226 Difference]: Without dead ends: 206 [2021-10-13 01:22:34,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:22:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-13 01:22:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 162. [2021-10-13 01:22:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 93 states have (on average 1.7634408602150538) internal successors, (164), 150 states have internal predecessors, (164), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:22:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 177 transitions. [2021-10-13 01:22:34,886 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 177 transitions. Word has length 11 [2021-10-13 01:22:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:34,886 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 177 transitions. [2021-10-13 01:22:34,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 01:22:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 177 transitions. [2021-10-13 01:22:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 01:22:34,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:34,887 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:34,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 01:22:34,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting create_treeErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash -108386449, now seen corresponding path program 1 times [2021-10-13 01:22:34,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:34,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760470046] [2021-10-13 01:22:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:34,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:34,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:35,000 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 01:22:35,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:35,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760470046] [2021-10-13 01:22:35,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760470046] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:35,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:35,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:22:35,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696557212] [2021-10-13 01:22:35,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:22:35,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:35,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:22:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:22:35,003 INFO L87 Difference]: Start difference. First operand 162 states and 177 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 01:22:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:35,364 INFO L93 Difference]: Finished difference Result 225 states and 244 transitions. [2021-10-13 01:22:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:22:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-10-13 01:22:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:35,366 INFO L225 Difference]: With dead ends: 225 [2021-10-13 01:22:35,367 INFO L226 Difference]: Without dead ends: 225 [2021-10-13 01:22:35,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:22:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-13 01:22:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 173. [2021-10-13 01:22:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 108 states have (on average 1.6851851851851851) internal successors, (182), 161 states have internal predecessors, (182), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:22:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 195 transitions. [2021-10-13 01:22:35,386 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 195 transitions. Word has length 11 [2021-10-13 01:22:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:35,386 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 195 transitions. [2021-10-13 01:22:35,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 01:22:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 195 transitions. [2021-10-13 01:22:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 01:22:35,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:35,387 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:35,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 01:22:35,388 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting create_treeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:35,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:35,388 INFO L82 PathProgramCache]: Analyzing trace with hash 874689698, now seen corresponding path program 1 times [2021-10-13 01:22:35,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:35,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595090198] [2021-10-13 01:22:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:35,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:35,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:35,483 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 01:22:35,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:35,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595090198] [2021-10-13 01:22:35,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595090198] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:35,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:35,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:22:35,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639593753] [2021-10-13 01:22:35,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:22:35,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:35,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:22:35,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:22:35,486 INFO L87 Difference]: Start difference. First operand 173 states and 195 transitions. Second operand has 4 states, 4 states have (on average 2.5) 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 01:22:35,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:35,779 INFO L93 Difference]: Finished difference Result 220 states and 247 transitions. [2021-10-13 01:22:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:22:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) 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 01:22:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:35,782 INFO L225 Difference]: With dead ends: 220 [2021-10-13 01:22:35,782 INFO L226 Difference]: Without dead ends: 220 [2021-10-13 01:22:35,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:22:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-13 01:22:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 177. [2021-10-13 01:22:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 112 states have (on average 1.6607142857142858) internal successors, (186), 165 states have internal predecessors, (186), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:22:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 199 transitions. [2021-10-13 01:22:35,796 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 199 transitions. Word has length 14 [2021-10-13 01:22:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:35,797 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 199 transitions. [2021-10-13 01:22:35,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) 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 01:22:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 199 transitions. [2021-10-13 01:22:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 01:22:35,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:35,798 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] [2021-10-13 01:22:35,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 01:22:35,803 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:35,804 INFO L82 PathProgramCache]: Analyzing trace with hash -388091640, now seen corresponding path program 1 times [2021-10-13 01:22:35,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:35,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480561177] [2021-10-13 01:22:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:35,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:35,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 01:22:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:35,953 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 01:22:35,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:35,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480561177] [2021-10-13 01:22:35,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480561177] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:35,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:35,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:22:35,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394642481] [2021-10-13 01:22:35,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:22:35,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:22:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:22:35,956 INFO L87 Difference]: Start difference. First operand 177 states and 199 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:22:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:36,617 INFO L93 Difference]: Finished difference Result 220 states and 243 transitions. [2021-10-13 01:22:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 01:22:36,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-10-13 01:22:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:36,622 INFO L225 Difference]: With dead ends: 220 [2021-10-13 01:22:36,622 INFO L226 Difference]: Without dead ends: 213 [2021-10-13 01:22:36,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:22:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-13 01:22:36,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 170. [2021-10-13 01:22:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 106 states have (on average 1.6886792452830188) internal successors, (179), 159 states have internal predecessors, (179), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 191 transitions. [2021-10-13 01:22:36,630 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 191 transitions. Word has length 21 [2021-10-13 01:22:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:36,630 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 191 transitions. [2021-10-13 01:22:36,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:22:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 191 transitions. [2021-10-13 01:22:36,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 01:22:36,631 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:36,632 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:36,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 01:22:36,632 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting create_treeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:36,632 INFO L82 PathProgramCache]: Analyzing trace with hash 53276323, now seen corresponding path program 1 times [2021-10-13 01:22:36,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:36,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402483380] [2021-10-13 01:22:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:36,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:36,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:36,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:36,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402483380] [2021-10-13 01:22:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402483380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:22:36,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763840727] [2021-10-13 01:22:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:36,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:22:36,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:22:36,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:22:36,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:22:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:36,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:22:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:22:37,007 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 01:22:37,119 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 01:22:37,120 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 01:22:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:37,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763840727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:22:37,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:22:37,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-13 01:22:37,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817590674] [2021-10-13 01:22:37,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:22:37,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:22:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:22:37,327 INFO L87 Difference]: Start difference. First operand 170 states and 191 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:22:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:37,804 INFO L93 Difference]: Finished difference Result 222 states and 249 transitions. [2021-10-13 01:22:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:22:37,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-13 01:22:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:37,806 INFO L225 Difference]: With dead ends: 222 [2021-10-13 01:22:37,806 INFO L226 Difference]: Without dead ends: 222 [2021-10-13 01:22:37,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:22:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-13 01:22:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 169. [2021-10-13 01:22:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 106 states have (on average 1.679245283018868) internal successors, (178), 158 states have internal predecessors, (178), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2021-10-13 01:22:37,829 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 23 [2021-10-13 01:22:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:37,829 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2021-10-13 01:22:37,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:22:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2021-10-13 01:22:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 01:22:37,830 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:37,831 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:37,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:22:38,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-13 01:22:38,044 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting create_treeErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash 53276324, now seen corresponding path program 1 times [2021-10-13 01:22:38,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:38,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944417649] [2021-10-13 01:22:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:38,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:38,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:38,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:38,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944417649] [2021-10-13 01:22:38,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944417649] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:22:38,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59771120] [2021-10-13 01:22:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:38,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:22:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:22:38,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:22:38,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 01:22:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 01:22:38,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:22:38,303 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 01:22:38,310 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 01:22:38,472 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:22:38,472 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 22 treesize of output 24 [2021-10-13 01:22:38,481 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:22:38,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-13 01:22:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:38,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59771120] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:22:38,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:22:38,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 01:22:38,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250914375] [2021-10-13 01:22:38,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:22:38,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:38,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:22:38,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:22:38,619 INFO L87 Difference]: Start difference. First operand 169 states and 190 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:22:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:39,206 INFO L93 Difference]: Finished difference Result 230 states and 249 transitions. [2021-10-13 01:22:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:22:39,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-13 01:22:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:39,213 INFO L225 Difference]: With dead ends: 230 [2021-10-13 01:22:39,213 INFO L226 Difference]: Without dead ends: 230 [2021-10-13 01:22:39,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:22:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-13 01:22:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 168. [2021-10-13 01:22:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 106 states have (on average 1.669811320754717) internal successors, (177), 157 states have internal predecessors, (177), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 189 transitions. [2021-10-13 01:22:39,219 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 189 transitions. Word has length 23 [2021-10-13 01:22:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:39,219 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 189 transitions. [2021-10-13 01:22:39,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:22:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 189 transitions. [2021-10-13 01:22:39,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 01:22:39,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:39,221 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:39,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:22:39,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-13 01:22:39,432 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting create_treeErr14REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:39,432 INFO L82 PathProgramCache]: Analyzing trace with hash -190246733, now seen corresponding path program 1 times [2021-10-13 01:22:39,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:39,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614111131] [2021-10-13 01:22:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:39,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:39,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 01:22:39,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:39,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614111131] [2021-10-13 01:22:39,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614111131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:39,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:39,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:22:39,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313760343] [2021-10-13 01:22:39,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:22:39,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:39,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:22:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:22:39,524 INFO L87 Difference]: Start difference. First operand 168 states and 189 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 01:22:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:39,968 INFO L93 Difference]: Finished difference Result 205 states and 228 transitions. [2021-10-13 01:22:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:22:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 26 [2021-10-13 01:22:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:39,970 INFO L225 Difference]: With dead ends: 205 [2021-10-13 01:22:39,970 INFO L226 Difference]: Without dead ends: 205 [2021-10-13 01:22:39,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:22:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-13 01:22:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2021-10-13 01:22:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 106 states have (on average 1.650943396226415) internal successors, (175), 156 states have internal predecessors, (175), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 187 transitions. [2021-10-13 01:22:39,978 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 187 transitions. Word has length 26 [2021-10-13 01:22:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:39,979 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 187 transitions. [2021-10-13 01:22:39,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 01:22:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 187 transitions. [2021-10-13 01:22:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 01:22:39,985 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:39,985 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:39,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 01:22:39,986 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting create_treeErr15REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:39,986 INFO L82 PathProgramCache]: Analyzing trace with hash -190246732, now seen corresponding path program 1 times [2021-10-13 01:22:39,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:39,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821553062] [2021-10-13 01:22:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:39,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:40,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 01:22:40,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:40,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821553062] [2021-10-13 01:22:40,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821553062] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:40,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:40,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:22:40,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781086050] [2021-10-13 01:22:40,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:22:40,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:22:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:22:40,110 INFO L87 Difference]: Start difference. First operand 167 states and 187 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 01:22:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:40,577 INFO L93 Difference]: Finished difference Result 204 states and 226 transitions. [2021-10-13 01:22:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:22:40,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 26 [2021-10-13 01:22:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:40,580 INFO L225 Difference]: With dead ends: 204 [2021-10-13 01:22:40,580 INFO L226 Difference]: Without dead ends: 204 [2021-10-13 01:22:40,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:22:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-13 01:22:40,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 166. [2021-10-13 01:22:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 106 states have (on average 1.6320754716981132) internal successors, (173), 155 states have internal predecessors, (173), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 185 transitions. [2021-10-13 01:22:40,586 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 185 transitions. Word has length 26 [2021-10-13 01:22:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:40,587 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 185 transitions. [2021-10-13 01:22:40,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 01:22:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 185 transitions. [2021-10-13 01:22:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 01:22:40,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:40,593 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:40,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 01:22:40,594 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:40,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:40,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1822618347, now seen corresponding path program 1 times [2021-10-13 01:22:40,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:40,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010290612] [2021-10-13 01:22:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:40,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:40,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:40,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 01:22:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:40,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:40,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010290612] [2021-10-13 01:22:40,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010290612] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:40,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:40,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:22:40,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234608054] [2021-10-13 01:22:40,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:22:40,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:40,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:22:40,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:22:40,688 INFO L87 Difference]: Start difference. First operand 166 states and 185 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:22:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:41,070 INFO L93 Difference]: Finished difference Result 210 states and 224 transitions. [2021-10-13 01:22:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:22:41,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-10-13 01:22:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:41,072 INFO L225 Difference]: With dead ends: 210 [2021-10-13 01:22:41,073 INFO L226 Difference]: Without dead ends: 210 [2021-10-13 01:22:41,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:22:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-13 01:22:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-10-13 01:22:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.619047619047619) internal successors, (170), 154 states have internal predecessors, (170), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 182 transitions. [2021-10-13 01:22:41,078 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 182 transitions. Word has length 26 [2021-10-13 01:22:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:41,078 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 182 transitions. [2021-10-13 01:22:41,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:22:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 182 transitions. [2021-10-13 01:22:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 01:22:41,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:41,081 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:41,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 01:22:41,081 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting create_treeErr18REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1716475476, now seen corresponding path program 1 times [2021-10-13 01:22:41,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:41,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781002667] [2021-10-13 01:22:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:41,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:41,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:41,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:41,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781002667] [2021-10-13 01:22:41,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781002667] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:41,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:41,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:22:41,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856861486] [2021-10-13 01:22:41,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:22:41,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:22:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:22:41,225 INFO L87 Difference]: Start difference. First operand 165 states and 182 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 01:22:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:41,885 INFO L93 Difference]: Finished difference Result 204 states and 222 transitions. [2021-10-13 01:22:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:22:41,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 29 [2021-10-13 01:22:41,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:41,887 INFO L225 Difference]: With dead ends: 204 [2021-10-13 01:22:41,887 INFO L226 Difference]: Without dead ends: 204 [2021-10-13 01:22:41,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:22:41,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-13 01:22:41,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 165. [2021-10-13 01:22:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.6095238095238096) internal successors, (169), 154 states have internal predecessors, (169), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 181 transitions. [2021-10-13 01:22:41,894 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 181 transitions. Word has length 29 [2021-10-13 01:22:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:41,897 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 181 transitions. [2021-10-13 01:22:41,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 01:22:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 181 transitions. [2021-10-13 01:22:41,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 01:22:41,902 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:41,903 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:41,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 01:22:41,903 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting create_treeErr19REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:41,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1716475477, now seen corresponding path program 1 times [2021-10-13 01:22:41,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:41,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976214063] [2021-10-13 01:22:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:41,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:42,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:42,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:42,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976214063] [2021-10-13 01:22:42,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976214063] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:42,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:42,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 01:22:42,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458077404] [2021-10-13 01:22:42,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:22:42,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:22:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:22:42,079 INFO L87 Difference]: Start difference. First operand 165 states and 181 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 01:22:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:42,667 INFO L93 Difference]: Finished difference Result 203 states and 221 transitions. [2021-10-13 01:22:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:22:42,667 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 29 [2021-10-13 01:22:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:42,669 INFO L225 Difference]: With dead ends: 203 [2021-10-13 01:22:42,669 INFO L226 Difference]: Without dead ends: 203 [2021-10-13 01:22:42,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:22:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-13 01:22:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-10-13 01:22:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.6) internal successors, (168), 154 states have internal predecessors, (168), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 180 transitions. [2021-10-13 01:22:42,675 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 180 transitions. Word has length 29 [2021-10-13 01:22:42,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:42,676 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 180 transitions. [2021-10-13 01:22:42,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 01:22:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 180 transitions. [2021-10-13 01:22:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 01:22:42,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:42,677 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:42,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 01:22:42,678 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting create_treeErr22REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:42,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:42,678 INFO L82 PathProgramCache]: Analyzing trace with hash -359646150, now seen corresponding path program 1 times [2021-10-13 01:22:42,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:42,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089362166] [2021-10-13 01:22:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:42,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:42,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:42,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:42,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089362166] [2021-10-13 01:22:42,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089362166] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:42,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:42,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 01:22:42,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487230388] [2021-10-13 01:22:42,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:22:42,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:42,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:22:42,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:22:42,823 INFO L87 Difference]: Start difference. First operand 165 states and 180 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 01:22:43,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:43,607 INFO L93 Difference]: Finished difference Result 204 states and 220 transitions. [2021-10-13 01:22:43,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:22:43,608 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 32 [2021-10-13 01:22:43,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:43,610 INFO L225 Difference]: With dead ends: 204 [2021-10-13 01:22:43,610 INFO L226 Difference]: Without dead ends: 204 [2021-10-13 01:22:43,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-13 01:22:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-13 01:22:43,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 165. [2021-10-13 01:22:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.5904761904761904) internal successors, (167), 154 states have internal predecessors, (167), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-10-13 01:22:43,616 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 32 [2021-10-13 01:22:43,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:43,617 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-10-13 01:22:43,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 01:22:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-10-13 01:22:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 01:22:43,619 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:43,619 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:43,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 01:22:43,620 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting create_treeErr23REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:43,620 INFO L82 PathProgramCache]: Analyzing trace with hash -359646149, now seen corresponding path program 1 times [2021-10-13 01:22:43,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:43,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461122255] [2021-10-13 01:22:43,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:43,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:43,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:43,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:43,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461122255] [2021-10-13 01:22:43,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461122255] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:43,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:43,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 01:22:43,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635924791] [2021-10-13 01:22:43,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:22:43,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:43,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:22:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:22:43,816 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 01:22:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:44,420 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2021-10-13 01:22:44,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:22:44,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 32 [2021-10-13 01:22:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:44,422 INFO L225 Difference]: With dead ends: 203 [2021-10-13 01:22:44,422 INFO L226 Difference]: Without dead ends: 203 [2021-10-13 01:22:44,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-13 01:22:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-13 01:22:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-10-13 01:22:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.5809523809523809) internal successors, (166), 154 states have internal predecessors, (166), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2021-10-13 01:22:44,429 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 32 [2021-10-13 01:22:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:44,429 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2021-10-13 01:22:44,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 01:22:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2021-10-13 01:22:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 01:22:44,430 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:44,430 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:44,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 01:22:44,431 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting create_treeErr26REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:44,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:44,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1725030331, now seen corresponding path program 1 times [2021-10-13 01:22:44,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:44,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921186156] [2021-10-13 01:22:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:44,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:44,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:44,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:44,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921186156] [2021-10-13 01:22:44,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921186156] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:44,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:44,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:22:44,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475152492] [2021-10-13 01:22:44,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:22:44,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:44,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:22:44,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:22:44,604 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 01:22:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:45,164 INFO L93 Difference]: Finished difference Result 205 states and 219 transitions. [2021-10-13 01:22:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 01:22:45,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 35 [2021-10-13 01:22:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:45,165 INFO L225 Difference]: With dead ends: 205 [2021-10-13 01:22:45,166 INFO L226 Difference]: Without dead ends: 205 [2021-10-13 01:22:45,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-10-13 01:22:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-10-13 01:22:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 165. [2021-10-13 01:22:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.5714285714285714) internal successors, (165), 154 states have internal predecessors, (165), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2021-10-13 01:22:45,172 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 35 [2021-10-13 01:22:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:45,172 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2021-10-13 01:22:45,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 01:22:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2021-10-13 01:22:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 01:22:45,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:45,173 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:45,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 01:22:45,174 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting create_treeErr27REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:45,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1725030332, now seen corresponding path program 1 times [2021-10-13 01:22:45,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:45,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869111588] [2021-10-13 01:22:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:45,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:45,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:45,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:45,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869111588] [2021-10-13 01:22:45,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869111588] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:22:45,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:22:45,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:22:45,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917289568] [2021-10-13 01:22:45,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:22:45,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:45,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:22:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:22:45,393 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 01:22:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:22:46,006 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2021-10-13 01:22:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:22:46,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 35 [2021-10-13 01:22:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:22:46,008 INFO L225 Difference]: With dead ends: 203 [2021-10-13 01:22:46,009 INFO L226 Difference]: Without dead ends: 203 [2021-10-13 01:22:46,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:22:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-13 01:22:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-10-13 01:22:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 105 states have (on average 1.561904761904762) internal successors, (164), 154 states have internal predecessors, (164), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:22:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 176 transitions. [2021-10-13 01:22:46,015 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 176 transitions. Word has length 35 [2021-10-13 01:22:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:22:46,016 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 176 transitions. [2021-10-13 01:22:46,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 01:22:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 176 transitions. [2021-10-13 01:22:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 01:22:46,017 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:22:46,017 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:22:46,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 01:22:46,017 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting create_treeErr10REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:22:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:22:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash 11285986, now seen corresponding path program 1 times [2021-10-13 01:22:46,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:22:46,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753936617] [2021-10-13 01:22:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:46,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:22:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:46,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:22:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:46,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:22:46,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753936617] [2021-10-13 01:22:46,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753936617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:22:46,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310352818] [2021-10-13 01:22:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:22:46,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:22:46,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:22:46,358 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:22:46,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 01:22:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:22:46,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-13 01:22:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:22:46,559 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-13 01:22:46,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-10-13 01:22:46,726 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-10-13 01:22:46,726 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 3 case distinctions, treesize of input 17 treesize of output 30 [2021-10-13 01:22:46,855 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 13 treesize of output 9 [2021-10-13 01:22:46,865 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 13 treesize of output 9 [2021-10-13 01:22:47,024 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-13 01:22:47,024 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 29 treesize of output 13 [2021-10-13 01:22:47,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:22:47,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 13 [2021-10-13 01:22:47,212 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 01:22:47,213 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 23 treesize of output 22 [2021-10-13 01:22:47,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:22:47,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 22 [2021-10-13 01:22:47,345 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-13 01:22:47,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 49 [2021-10-13 01:22:47,486 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-10-13 01:22:47,487 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 52 treesize of output 54 [2021-10-13 01:22:47,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:22:47,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:22:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:22:47,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 01:22:47,903 INFO L354 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2021-10-13 01:22:47,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 93 [2021-10-13 01:22:47,933 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-13 01:22:47,934 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 101 treesize of output 99 [2021-10-13 01:22:48,357 INFO L354 Elim1Store]: treesize reduction 188, result has 14.9 percent of original size [2021-10-13 01:22:48,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 135 treesize of output 114 [2021-10-13 01:22:48,388 INFO L354 Elim1Store]: treesize reduction 156, result has 16.1 percent of original size [2021-10-13 01:22:48,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 128 [2021-10-13 01:22:52,893 INFO L354 Elim1Store]: treesize reduction 218, result has 15.8 percent of original size [2021-10-13 01:22:52,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 159 treesize of output 136 [2021-10-13 01:22:52,937 INFO L354 Elim1Store]: treesize reduction 190, result has 16.7 percent of original size [2021-10-13 01:22:52,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 118 [2021-10-13 01:22:53,231 INFO L354 Elim1Store]: treesize reduction 128, result has 16.9 percent of original size [2021-10-13 01:22:53,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 111 [2021-10-13 01:22:53,257 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-10-13 01:22:53,257 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 119 treesize of output 117 [2021-10-13 01:22:53,281 INFO L354 Elim1Store]: treesize reduction 44, result has 27.9 percent of original size [2021-10-13 01:22:53,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 115 [2021-10-13 01:22:53,439 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-10-13 01:22:53,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 60 [2021-10-13 01:22:53,446 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 01:22:53,447 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 31 [2021-10-13 01:22:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:22:53,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310352818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:22:53,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:22:53,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-10-13 01:22:53,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592942974] [2021-10-13 01:22:53,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 01:22:53,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:22:53,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 01:22:53,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=679, Unknown=2, NotChecked=0, Total=812 [2021-10-13 01:22:53,465 INFO L87 Difference]: Start difference. First operand 165 states and 176 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:23:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:23:14,077 INFO L93 Difference]: Finished difference Result 234 states and 248 transitions. [2021-10-13 01:23:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 01:23:14,078 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-10-13 01:23:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:23:14,079 INFO L225 Difference]: With dead ends: 234 [2021-10-13 01:23:14,079 INFO L226 Difference]: Without dead ends: 234 [2021-10-13 01:23:14,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 19985.1ms TimeCoverageRelationStatistics Valid=403, Invalid=2138, Unknown=9, NotChecked=0, Total=2550 [2021-10-13 01:23:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-13 01:23:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2021-10-13 01:23:14,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 131 states have (on average 1.4580152671755726) internal successors, (191), 180 states have internal predecessors, (191), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:23:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 203 transitions. [2021-10-13 01:23:14,087 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 203 transitions. Word has length 40 [2021-10-13 01:23:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:23:14,092 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 203 transitions. [2021-10-13 01:23:14,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:23:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 203 transitions. [2021-10-13 01:23:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 01:23:14,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:23:14,093 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:23:14,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:23:14,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 01:23:14,294 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:23:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:23:14,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1714624533, now seen corresponding path program 1 times [2021-10-13 01:23:14,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:23:14,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897387783] [2021-10-13 01:23:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:23:14,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:23:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:14,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:23:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:14,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 01:23:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:23:14,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:23:14,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897387783] [2021-10-13 01:23:14,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897387783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:23:14,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:23:14,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 01:23:14,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016578850] [2021-10-13 01:23:14,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:23:14,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:23:14,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:23:14,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:23:14,429 INFO L87 Difference]: Start difference. First operand 191 states and 203 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:23:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:23:15,038 INFO L93 Difference]: Finished difference Result 230 states and 243 transitions. [2021-10-13 01:23:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 01:23:15,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-10-13 01:23:15,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:23:15,040 INFO L225 Difference]: With dead ends: 230 [2021-10-13 01:23:15,041 INFO L226 Difference]: Without dead ends: 230 [2021-10-13 01:23:15,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:23:15,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-13 01:23:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 191. [2021-10-13 01:23:15,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 131 states have (on average 1.4427480916030535) internal successors, (189), 180 states have internal predecessors, (189), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:23:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2021-10-13 01:23:15,047 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 45 [2021-10-13 01:23:15,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:23:15,047 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2021-10-13 01:23:15,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:23:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2021-10-13 01:23:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 01:23:15,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:23:15,048 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:15,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-13 01:23:15,049 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:23:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:23:15,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2037935847, now seen corresponding path program 1 times [2021-10-13 01:23:15,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:23:15,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127288379] [2021-10-13 01:23:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:23:15,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:23:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:15,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:23:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:15,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 01:23:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:23:15,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:23:15,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127288379] [2021-10-13 01:23:15,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127288379] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:23:15,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:23:15,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-13 01:23:15,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65197465] [2021-10-13 01:23:15,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:23:15,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:23:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:23:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:23:15,193 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:23:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:23:15,955 INFO L93 Difference]: Finished difference Result 253 states and 268 transitions. [2021-10-13 01:23:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:23:15,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-10-13 01:23:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:23:15,958 INFO L225 Difference]: With dead ends: 253 [2021-10-13 01:23:15,958 INFO L226 Difference]: Without dead ends: 253 [2021-10-13 01:23:15,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:23:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-10-13 01:23:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 191. [2021-10-13 01:23:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 132 states have (on average 1.4318181818181819) internal successors, (189), 180 states have internal predecessors, (189), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:23:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 200 transitions. [2021-10-13 01:23:15,965 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 200 transitions. Word has length 49 [2021-10-13 01:23:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:23:15,965 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 200 transitions. [2021-10-13 01:23:15,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:23:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 200 transitions. [2021-10-13 01:23:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 01:23:15,966 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:23:15,966 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:15,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-13 01:23:15,967 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting inspectErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:23:15,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:23:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1248564646, now seen corresponding path program 1 times [2021-10-13 01:23:15,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:23:15,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132330286] [2021-10-13 01:23:15,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:23:15,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:23:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:16,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:23:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:16,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 01:23:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:23:16,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:23:16,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132330286] [2021-10-13 01:23:16,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132330286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:23:16,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536258284] [2021-10-13 01:23:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:23:16,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:23:16,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:23:16,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:23:16,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 01:23:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:16,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 01:23:16,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:23:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:23:16,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536258284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:23:16,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:23:16,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 11 [2021-10-13 01:23:16,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233909635] [2021-10-13 01:23:16,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:23:16,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:23:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:23:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:23:16,528 INFO L87 Difference]: Start difference. First operand 191 states and 200 transitions. Second operand has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:23:17,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:23:17,179 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2021-10-13 01:23:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 01:23:17,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-10-13 01:23:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:23:17,181 INFO L225 Difference]: With dead ends: 229 [2021-10-13 01:23:17,181 INFO L226 Difference]: Without dead ends: 229 [2021-10-13 01:23:17,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-13 01:23:17,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-10-13 01:23:17,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 189. [2021-10-13 01:23:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 133 states have (on average 1.413533834586466) internal successors, (188), 178 states have internal predecessors, (188), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:23:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 199 transitions. [2021-10-13 01:23:17,188 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 199 transitions. Word has length 50 [2021-10-13 01:23:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:23:17,189 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 199 transitions. [2021-10-13 01:23:17,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:23:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 199 transitions. [2021-10-13 01:23:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 01:23:17,190 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:23:17,190 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:23:17,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:23:17,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:23:17,412 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting inspectErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:23:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:23:17,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1248564645, now seen corresponding path program 1 times [2021-10-13 01:23:17,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:23:17,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227814556] [2021-10-13 01:23:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:23:17,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:23:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:17,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:23:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:17,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 01:23:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:23:17,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:23:17,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227814556] [2021-10-13 01:23:17,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227814556] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:23:17,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073692615] [2021-10-13 01:23:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:23:17,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:23:17,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:23:17,664 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:23:17,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 01:23:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 01:23:17,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:23:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:23:18,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073692615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:23:18,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:23:18,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-13 01:23:18,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379262741] [2021-10-13 01:23:18,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 01:23:18,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:23:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 01:23:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-10-13 01:23:18,410 INFO L87 Difference]: Start difference. First operand 189 states and 199 transitions. Second operand has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 14 states have internal predecessors, (86), 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 01:23:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:23:19,467 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2021-10-13 01:23:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 01:23:19,470 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 14 states have internal predecessors, (86), 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 50 [2021-10-13 01:23:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:23:19,471 INFO L225 Difference]: With dead ends: 244 [2021-10-13 01:23:19,472 INFO L226 Difference]: Without dead ends: 244 [2021-10-13 01:23:19,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:23:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-13 01:23:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 191. [2021-10-13 01:23:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 135 states have (on average 1.4074074074074074) internal successors, (190), 180 states have internal predecessors, (190), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:23:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2021-10-13 01:23:19,478 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 50 [2021-10-13 01:23:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:23:19,478 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2021-10-13 01:23:19,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 14 states have internal predecessors, (86), 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 01:23:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2021-10-13 01:23:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 01:23:19,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:23:19,479 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:23:19,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:23:19,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:23:19,704 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting create_treeErr10REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:23:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:23:19,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1489839671, now seen corresponding path program 1 times [2021-10-13 01:23:19,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:23:19,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997610669] [2021-10-13 01:23:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:23:19,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:23:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:20,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:23:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:23:20,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:23:20,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997610669] [2021-10-13 01:23:20,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997610669] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:23:20,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979981005] [2021-10-13 01:23:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:23:20,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:23:20,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:23:20,042 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:23:20,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 01:23:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 01:23:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:23:20,403 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 01:23:20,533 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 01:23:20,534 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 01:23:20,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:23:20,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:23:20,711 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 01:23:20,711 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-10-13 01:23:20,724 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-13 01:23:20,724 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 67 treesize of output 60 [2021-10-13 01:23:20,835 INFO L354 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2021-10-13 01:23:20,835 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 95 treesize of output 67 [2021-10-13 01:23:20,860 INFO L354 Elim1Store]: treesize reduction 104, result has 18.1 percent of original size [2021-10-13 01:23:20,861 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 76 treesize of output 63 [2021-10-13 01:23:21,004 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 01:23:21,004 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 83 treesize of output 70 [2021-10-13 01:23:21,025 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-13 01:23:21,025 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 79 treesize of output 81 [2021-10-13 01:23:21,145 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-10-13 01:23:21,146 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 28 treesize of output 45 [2021-10-13 01:23:21,285 INFO L354 Elim1Store]: treesize reduction 138, result has 18.8 percent of original size [2021-10-13 01:23:21,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 121 [2021-10-13 01:23:21,318 INFO L354 Elim1Store]: treesize reduction 108, result has 19.4 percent of original size [2021-10-13 01:23:21,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 89 [2021-10-13 01:23:21,668 INFO L354 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2021-10-13 01:23:21,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 110 [2021-10-13 01:23:21,720 INFO L354 Elim1Store]: treesize reduction 178, result has 15.2 percent of original size [2021-10-13 01:23:21,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 137 [2021-10-13 01:23:22,093 INFO L354 Elim1Store]: treesize reduction 268, result has 13.0 percent of original size [2021-10-13 01:23:22,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 170 treesize of output 131 [2021-10-13 01:23:22,158 INFO L354 Elim1Store]: treesize reduction 272, result has 13.7 percent of original size [2021-10-13 01:23:22,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 162 treesize of output 166 [2021-10-13 01:23:26,626 INFO L354 Elim1Store]: treesize reduction 306, result has 13.6 percent of original size [2021-10-13 01:23:26,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 194 treesize of output 153 [2021-10-13 01:23:26,682 INFO L354 Elim1Store]: treesize reduction 318, result has 13.8 percent of original size [2021-10-13 01:23:26,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 169 treesize of output 156 [2021-10-13 01:23:26,955 INFO L354 Elim1Store]: treesize reduction 196, result has 14.4 percent of original size [2021-10-13 01:23:26,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 148 treesize of output 114 [2021-10-13 01:23:26,999 INFO L354 Elim1Store]: treesize reduction 190, result has 14.4 percent of original size [2021-10-13 01:23:27,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 141 [2021-10-13 01:23:27,224 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-13 01:23:27,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 89 [2021-10-13 01:23:27,236 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-10-13 01:23:27,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 50 [2021-10-13 01:23:27,433 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-10-13 01:23:27,433 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 6 case distinctions, treesize of input 34 treesize of output 42 [2021-10-13 01:23:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:23:27,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979981005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:23:27,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:23:27,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-10-13 01:23:27,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460943730] [2021-10-13 01:23:27,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 01:23:27,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:23:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 01:23:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1009, Unknown=2, NotChecked=0, Total=1190 [2021-10-13 01:23:27,927 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:23:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:23:49,520 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2021-10-13 01:23:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 01:23:49,520 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-13 01:23:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:23:49,522 INFO L225 Difference]: With dead ends: 276 [2021-10-13 01:23:49,522 INFO L226 Difference]: Without dead ends: 276 [2021-10-13 01:23:49,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 21142.0ms TimeCoverageRelationStatistics Valid=784, Invalid=3367, Unknown=9, NotChecked=0, Total=4160 [2021-10-13 01:23:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-10-13 01:23:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 194. [2021-10-13 01:23:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 138 states have (on average 1.4130434782608696) internal successors, (195), 183 states have internal predecessors, (195), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:23:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 206 transitions. [2021-10-13 01:23:49,529 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 206 transitions. Word has length 50 [2021-10-13 01:23:49,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:23:49,530 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 206 transitions. [2021-10-13 01:23:49,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:23:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 206 transitions. [2021-10-13 01:23:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 01:23:49,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:23:49,531 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:23:49,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 01:23:49,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 01:23:49,749 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting create_treeErr11REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:23:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:23:49,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1489839672, now seen corresponding path program 1 times [2021-10-13 01:23:49,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:23:49,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506759110] [2021-10-13 01:23:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:23:49,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:23:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:50,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:23:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:23:50,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:23:50,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506759110] [2021-10-13 01:23:50,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506759110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:23:50,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50074205] [2021-10-13 01:23:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:23:50,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:23:50,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:23:50,330 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:23:50,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 01:23:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:23:50,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 01:23:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:23:50,831 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 01:23:50,837 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 01:23:50,926 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:23:50,927 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 01:23:50,945 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 01:23:50,945 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 01:23:51,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:23:51,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 01:23:51,164 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-13 01:23:51,165 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 70 [2021-10-13 01:23:51,179 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-13 01:23:51,180 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 78 [2021-10-13 01:23:51,332 INFO L354 Elim1Store]: treesize reduction 112, result has 18.2 percent of original size [2021-10-13 01:23:51,333 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 122 treesize of output 88 [2021-10-13 01:23:51,352 INFO L354 Elim1Store]: treesize reduction 104, result has 18.1 percent of original size [2021-10-13 01:23:51,352 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 103 treesize of output 81 [2021-10-13 01:23:51,516 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-10-13 01:23:51,516 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 110 treesize of output 91 [2021-10-13 01:23:51,546 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-10-13 01:23:51,546 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 106 treesize of output 99 [2021-10-13 01:23:51,685 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-10-13 01:23:51,685 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 28 treesize of output 45 [2021-10-13 01:23:51,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-10-13 01:23:51,843 INFO L354 Elim1Store]: treesize reduction 148, result has 18.7 percent of original size [2021-10-13 01:23:51,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 126 [2021-10-13 01:23:51,871 INFO L354 Elim1Store]: treesize reduction 138, result has 18.8 percent of original size [2021-10-13 01:23:51,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 149 [2021-10-13 01:23:52,272 INFO L354 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2021-10-13 01:23:52,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 164 treesize of output 120 [2021-10-13 01:23:52,300 INFO L354 Elim1Store]: treesize reduction 178, result has 15.2 percent of original size [2021-10-13 01:23:52,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 157 [2021-10-13 01:23:52,714 INFO L354 Elim1Store]: treesize reduction 268, result has 13.0 percent of original size [2021-10-13 01:23:52,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 190 treesize of output 141 [2021-10-13 01:23:52,766 INFO L354 Elim1Store]: treesize reduction 272, result has 13.7 percent of original size [2021-10-13 01:23:52,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 182 treesize of output 186 [2021-10-13 01:23:57,223 INFO L354 Elim1Store]: treesize reduction 306, result has 13.6 percent of original size [2021-10-13 01:23:57,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 214 treesize of output 163 [2021-10-13 01:23:57,274 INFO L354 Elim1Store]: treesize reduction 318, result has 13.8 percent of original size [2021-10-13 01:23:57,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 189 treesize of output 176 [2021-10-13 01:23:57,558 INFO L354 Elim1Store]: treesize reduction 196, result has 14.4 percent of original size [2021-10-13 01:23:57,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 168 treesize of output 124 [2021-10-13 01:23:57,586 INFO L354 Elim1Store]: treesize reduction 190, result has 14.4 percent of original size [2021-10-13 01:23:57,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 161 [2021-10-13 01:23:57,821 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-13 01:23:57,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 104 [2021-10-13 01:23:57,829 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-10-13 01:23:57,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 65 [2021-10-13 01:23:58,073 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-10-13 01:23:58,074 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 6 case distinctions, treesize of input 54 treesize of output 62 [2021-10-13 01:23:58,092 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-13 01:23:58,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 57 [2021-10-13 01:23:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:23:58,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50074205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:23:58,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:23:58,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-10-13 01:23:58,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214311325] [2021-10-13 01:23:58,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 01:23:58,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:23:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 01:23:58,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1025, Unknown=2, NotChecked=0, Total=1190 [2021-10-13 01:23:58,194 INFO L87 Difference]: Start difference. First operand 194 states and 206 transitions. Second operand has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:24:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:03,943 INFO L93 Difference]: Finished difference Result 300 states and 316 transitions. [2021-10-13 01:24:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 01:24:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-13 01:24:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:03,945 INFO L225 Difference]: With dead ends: 300 [2021-10-13 01:24:03,945 INFO L226 Difference]: Without dead ends: 300 [2021-10-13 01:24:03,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 8961.7ms TimeCoverageRelationStatistics Valid=1132, Invalid=5186, Unknown=2, NotChecked=0, Total=6320 [2021-10-13 01:24:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-10-13 01:24:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 209. [2021-10-13 01:24:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 153 states have (on average 1.4052287581699345) internal successors, (215), 198 states have internal predecessors, (215), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:24:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2021-10-13 01:24:03,953 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 50 [2021-10-13 01:24:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:03,954 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2021-10-13 01:24:03,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 34 states have internal predecessors, (83), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:24:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2021-10-13 01:24:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 01:24:03,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:03,955 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:03,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:24:04,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-13 01:24:04,180 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting inspectErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:24:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1574744257, now seen corresponding path program 1 times [2021-10-13 01:24:04,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:04,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157385356] [2021-10-13 01:24:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:04,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:04,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:04,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 01:24:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:04,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:04,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157385356] [2021-10-13 01:24:04,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157385356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:04,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386904005] [2021-10-13 01:24:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:04,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:04,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:04,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:04,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 01:24:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:05,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-13 01:24:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:05,049 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-13 01:24:05,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-10-13 01:24:05,681 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:24:05,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 25 [2021-10-13 01:24:05,968 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-10-13 01:24:05,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 72 [2021-10-13 01:24:06,251 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 01:24:06,251 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 39 treesize of output 27 [2021-10-13 01:24:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:06,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386904005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:06,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:24:06,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-10-13 01:24:06,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918052838] [2021-10-13 01:24:06,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 01:24:06,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 01:24:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:24:06,281 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 22 states have internal predecessors, (92), 4 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-13 01:24:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:09,370 INFO L93 Difference]: Finished difference Result 311 states and 339 transitions. [2021-10-13 01:24:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 01:24:09,371 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 22 states have internal predecessors, (92), 4 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2021-10-13 01:24:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:09,372 INFO L225 Difference]: With dead ends: 311 [2021-10-13 01:24:09,372 INFO L226 Difference]: Without dead ends: 311 [2021-10-13 01:24:09,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1715.5ms TimeCoverageRelationStatistics Valid=314, Invalid=2548, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 01:24:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-13 01:24:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 250. [2021-10-13 01:24:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 191 states have (on average 1.4240837696335078) internal successors, (272), 237 states have internal predecessors, (272), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-13 01:24:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 286 transitions. [2021-10-13 01:24:09,381 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 286 transitions. Word has length 52 [2021-10-13 01:24:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:09,381 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 286 transitions. [2021-10-13 01:24:09,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 22 states have internal predecessors, (92), 4 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-13 01:24:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 286 transitions. [2021-10-13 01:24:09,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-13 01:24:09,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:09,382 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:09,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:24:09,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 01:24:09,608 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting inspectErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:24:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1572456405, now seen corresponding path program 1 times [2021-10-13 01:24:09,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:09,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656568034] [2021-10-13 01:24:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:09,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:09,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:09,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 01:24:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:10,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:10,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656568034] [2021-10-13 01:24:10,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656568034] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:10,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958244803] [2021-10-13 01:24:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:10,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:10,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:10,068 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:10,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 01:24:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 01:24:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:10,862 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 01:24:11,046 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:24:11,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 01:24:11,087 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 01:24:11,198 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:24:11,198 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-10-13 01:24:11,336 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-13 01:24:11,336 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 41 treesize of output 34 [2021-10-13 01:24:17,514 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-10-13 01:24:17,514 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 62 treesize of output 53 [2021-10-13 01:24:17,683 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:24:17,684 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-13 01:24:18,240 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 01:24:18,240 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 44 treesize of output 28 [2021-10-13 01:24:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:18,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958244803] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:18,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:24:18,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-10-13 01:24:18,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106457353] [2021-10-13 01:24:18,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 01:24:18,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 01:24:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1301, Unknown=2, NotChecked=0, Total=1406 [2021-10-13 01:24:18,247 INFO L87 Difference]: Start difference. First operand 250 states and 286 transitions. Second operand has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 32 states have internal predecessors, (91), 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 01:24:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:41,961 INFO L93 Difference]: Finished difference Result 337 states and 383 transitions. [2021-10-13 01:24:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 01:24:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 32 states have internal predecessors, (91), 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 53 [2021-10-13 01:24:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:41,974 INFO L225 Difference]: With dead ends: 337 [2021-10-13 01:24:41,974 INFO L226 Difference]: Without dead ends: 337 [2021-10-13 01:24:41,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 24052.5ms TimeCoverageRelationStatistics Valid=413, Invalid=3610, Unknown=9, NotChecked=0, Total=4032 [2021-10-13 01:24:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-10-13 01:24:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 284. [2021-10-13 01:24:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 222 states have (on average 1.427927927927928) internal successors, (317), 269 states have internal predecessors, (317), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:24:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 334 transitions. [2021-10-13 01:24:41,986 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 334 transitions. Word has length 53 [2021-10-13 01:24:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:41,986 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 334 transitions. [2021-10-13 01:24:41,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 32 states have internal predecessors, (91), 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 01:24:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 334 transitions. [2021-10-13 01:24:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-13 01:24:41,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:41,988 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:42,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 01:24:42,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 01:24:42,210 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting inspectErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:24:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:42,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1572456404, now seen corresponding path program 1 times [2021-10-13 01:24:42,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:42,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17758316] [2021-10-13 01:24:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:42,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:42,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:42,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 01:24:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:42,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:42,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17758316] [2021-10-13 01:24:42,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17758316] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:42,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997526771] [2021-10-13 01:24:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:42,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:42,771 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:42,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 01:24:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:43,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 01:24:43,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:43,404 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 01:24:43,563 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 01:24:43,573 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:24:43,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 01:24:43,616 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 01:24:43,622 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 01:24:43,772 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:24:43,772 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-13 01:24:43,782 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 01:24:43,782 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 55 treesize of output 50 [2021-10-13 01:24:43,979 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-13 01:24:43,979 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 89 treesize of output 66 [2021-10-13 01:24:43,998 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-13 01:24:43,998 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 81 treesize of output 79 [2021-10-13 01:24:48,301 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-10-13 01:24:48,301 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 113 treesize of output 88 [2021-10-13 01:24:48,328 INFO L354 Elim1Store]: treesize reduction 98, result has 21.6 percent of original size [2021-10-13 01:24:48,329 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 88 treesize of output 69 [2021-10-13 01:24:48,470 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:24:48,471 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-10-13 01:24:48,482 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 01:24:48,482 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 59 treesize of output 54 [2021-10-13 01:24:49,413 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-13 01:24:49,413 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 56 [2021-10-13 01:24:49,424 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 01:24:49,425 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 47 treesize of output 31 [2021-10-13 01:24:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:49,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997526771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:49,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:24:49,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-10-13 01:24:49,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559351560] [2021-10-13 01:24:49,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 01:24:49,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:49,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 01:24:49,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1229, Unknown=2, NotChecked=0, Total=1332 [2021-10-13 01:24:49,435 INFO L87 Difference]: Start difference. First operand 284 states and 334 transitions. Second operand has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 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 01:24:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:53,137 INFO L93 Difference]: Finished difference Result 339 states and 383 transitions. [2021-10-13 01:24:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 01:24:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 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 53 [2021-10-13 01:24:53,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:53,145 INFO L225 Difference]: With dead ends: 339 [2021-10-13 01:24:53,145 INFO L226 Difference]: Without dead ends: 339 [2021-10-13 01:24:53,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 6253.0ms TimeCoverageRelationStatistics Valid=348, Invalid=3072, Unknown=2, NotChecked=0, Total=3422 [2021-10-13 01:24:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-10-13 01:24:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 284. [2021-10-13 01:24:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 222 states have (on average 1.4189189189189189) internal successors, (315), 269 states have internal predecessors, (315), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:24:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 332 transitions. [2021-10-13 01:24:53,157 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 332 transitions. Word has length 53 [2021-10-13 01:24:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:53,158 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 332 transitions. [2021-10-13 01:24:53,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 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 01:24:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 332 transitions. [2021-10-13 01:24:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 01:24:53,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:53,160 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:53,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 01:24:53,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 01:24:53,388 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:24:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:53,388 INFO L82 PathProgramCache]: Analyzing trace with hash 159681268, now seen corresponding path program 1 times [2021-10-13 01:24:53,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:53,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544239616] [2021-10-13 01:24:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:53,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:53,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:53,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-13 01:24:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:54,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:54,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544239616] [2021-10-13 01:24:54,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544239616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:54,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289884687] [2021-10-13 01:24:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:54,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:54,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:54,096 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:54,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 01:24:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:54,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-13 01:24:54,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:54,934 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 01:24:55,078 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:24:55,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 01:24:55,117 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 01:24:55,234 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 01:24:55,235 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-10-13 01:24:55,429 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-13 01:24:55,429 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 41 treesize of output 34 [2021-10-13 01:25:01,700 INFO L354 Elim1Store]: treesize reduction 94, result has 22.3 percent of original size [2021-10-13 01:25:01,701 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 125 treesize of output 104 [2021-10-13 01:25:01,706 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 96 treesize of output 88 [2021-10-13 01:25:01,719 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-13 01:25:01,719 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 74 [2021-10-13 01:25:01,914 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 01:25:01,914 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 76 [2021-10-13 01:25:01,925 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 01:25:01,926 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 98 treesize of output 89 [2021-10-13 01:25:01,935 INFO L354 Elim1Store]: treesize reduction 53, result has 24.3 percent of original size [2021-10-13 01:25:01,935 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 90 treesize of output 62 [2021-10-13 01:25:02,827 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 01:25:02,828 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 79 treesize of output 59 [2021-10-13 01:25:02,837 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 01:25:02,837 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 32 [2021-10-13 01:25:02,889 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 19 treesize of output 7 [2021-10-13 01:25:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:25:02,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289884687] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:25:02,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:25:02,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-10-13 01:25:02,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345286124] [2021-10-13 01:25:02,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-13 01:25:02,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:25:02,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-13 01:25:02,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1530, Unknown=2, NotChecked=0, Total=1640 [2021-10-13 01:25:02,900 INFO L87 Difference]: Start difference. First operand 284 states and 332 transitions. Second operand has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 35 states have internal predecessors, (94), 4 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:25:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:25:28,010 INFO L93 Difference]: Finished difference Result 338 states and 380 transitions. [2021-10-13 01:25:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 01:25:28,024 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 35 states have internal predecessors, (94), 4 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2021-10-13 01:25:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:25:28,026 INFO L225 Difference]: With dead ends: 338 [2021-10-13 01:25:28,026 INFO L226 Difference]: Without dead ends: 338 [2021-10-13 01:25:28,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 24904.5ms TimeCoverageRelationStatistics Valid=412, Invalid=4001, Unknown=9, NotChecked=0, Total=4422 [2021-10-13 01:25:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-10-13 01:25:28,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 284. [2021-10-13 01:25:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 222 states have (on average 1.40990990990991) internal successors, (313), 269 states have internal predecessors, (313), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:25:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 330 transitions. [2021-10-13 01:25:28,037 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 330 transitions. Word has length 56 [2021-10-13 01:25:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:25:28,037 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 330 transitions. [2021-10-13 01:25:28,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.292682926829268) internal successors, (94), 35 states have internal predecessors, (94), 4 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:25:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 330 transitions. [2021-10-13 01:25:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 01:25:28,038 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:25:28,038 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:28,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 01:25:28,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 01:25:28,253 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, create_treeErr0REQUIRES_VIOLATION, create_treeErr1REQUIRES_VIOLATION (and 61 more)] === [2021-10-13 01:25:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:25:28,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1789567773, now seen corresponding path program 1 times [2021-10-13 01:25:28,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:25:28,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482636261] [2021-10-13 01:25:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:25:28,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:25:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:25:28,282 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:25:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:25:28,339 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:25:28,340 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 01:25:28,341 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 01:25:28,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 01:25:28,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr0REQUIRES_VIOLATION [2021-10-13 01:25:28,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr1REQUIRES_VIOLATION [2021-10-13 01:25:28,343 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr2REQUIRES_VIOLATION [2021-10-13 01:25:28,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr3REQUIRES_VIOLATION [2021-10-13 01:25:28,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr4REQUIRES_VIOLATION [2021-10-13 01:25:28,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr5REQUIRES_VIOLATION [2021-10-13 01:25:28,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr6REQUIRES_VIOLATION [2021-10-13 01:25:28,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr7REQUIRES_VIOLATION [2021-10-13 01:25:28,344 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr8REQUIRES_VIOLATION [2021-10-13 01:25:28,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr9REQUIRES_VIOLATION [2021-10-13 01:25:28,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr10REQUIRES_VIOLATION [2021-10-13 01:25:28,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr11REQUIRES_VIOLATION [2021-10-13 01:25:28,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr12REQUIRES_VIOLATION [2021-10-13 01:25:28,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr13REQUIRES_VIOLATION [2021-10-13 01:25:28,345 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr14REQUIRES_VIOLATION [2021-10-13 01:25:28,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr15REQUIRES_VIOLATION [2021-10-13 01:25:28,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr16REQUIRES_VIOLATION [2021-10-13 01:25:28,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr17REQUIRES_VIOLATION [2021-10-13 01:25:28,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr18REQUIRES_VIOLATION [2021-10-13 01:25:28,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr19REQUIRES_VIOLATION [2021-10-13 01:25:28,346 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr20REQUIRES_VIOLATION [2021-10-13 01:25:28,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr21REQUIRES_VIOLATION [2021-10-13 01:25:28,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr22REQUIRES_VIOLATION [2021-10-13 01:25:28,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr23REQUIRES_VIOLATION [2021-10-13 01:25:28,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr24REQUIRES_VIOLATION [2021-10-13 01:25:28,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr25REQUIRES_VIOLATION [2021-10-13 01:25:28,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr26REQUIRES_VIOLATION [2021-10-13 01:25:28,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr27REQUIRES_VIOLATION [2021-10-13 01:25:28,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr28REQUIRES_VIOLATION [2021-10-13 01:25:28,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location create_treeErr29REQUIRES_VIOLATION [2021-10-13 01:25:28,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr0REQUIRES_VIOLATION [2021-10-13 01:25:28,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr1REQUIRES_VIOLATION [2021-10-13 01:25:28,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr2REQUIRES_VIOLATION [2021-10-13 01:25:28,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr3REQUIRES_VIOLATION [2021-10-13 01:25:28,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr4REQUIRES_VIOLATION [2021-10-13 01:25:28,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr5REQUIRES_VIOLATION [2021-10-13 01:25:28,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr6REQUIRES_VIOLATION [2021-10-13 01:25:28,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr7REQUIRES_VIOLATION [2021-10-13 01:25:28,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr8REQUIRES_VIOLATION [2021-10-13 01:25:28,350 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location inspectErr9REQUIRES_VIOLATION [2021-10-13 01:25:28,350 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr0REQUIRES_VIOLATION [2021-10-13 01:25:28,350 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr1REQUIRES_VIOLATION [2021-10-13 01:25:28,350 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr2REQUIRES_VIOLATION [2021-10-13 01:25:28,350 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr3REQUIRES_VIOLATION [2021-10-13 01:25:28,350 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr4REQUIRES_VIOLATION [2021-10-13 01:25:28,351 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr5REQUIRES_VIOLATION [2021-10-13 01:25:28,351 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr6REQUIRES_VIOLATION [2021-10-13 01:25:28,351 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr7REQUIRES_VIOLATION [2021-10-13 01:25:28,351 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:25:28,351 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:25:28,352 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:25:28,352 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr11REQUIRES_VIOLATION [2021-10-13 01:25:28,352 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr12REQUIRES_VIOLATION [2021-10-13 01:25:28,352 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr13REQUIRES_VIOLATION [2021-10-13 01:25:28,352 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr14REQUIRES_VIOLATION [2021-10-13 01:25:28,352 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:25:28,353 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:25:28,353 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:25:28,353 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr18REQUIRES_VIOLATION [2021-10-13 01:25:28,353 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr19REQUIRES_VIOLATION [2021-10-13 01:25:28,353 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:25:28,353 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:25:28,354 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location free_treeErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:25:28,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-13 01:25:28,361 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:25:28,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:25:28 BoogieIcfgContainer [2021-10-13 01:25:28,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:25:28,430 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:25:28,430 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:25:28,430 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:25:28,431 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:22:32" (3/4) ... [2021-10-13 01:25:28,433 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 01:25:28,500 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 01:25:28,500 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:25:28,501 INFO L168 Benchmark]: Toolchain (without parser) took 177022.03 ms. Allocated memory was 104.9 MB in the beginning and 201.3 MB in the end (delta: 96.5 MB). Free memory was 63.0 MB in the beginning and 97.6 MB in the end (delta: -34.6 MB). Peak memory consumption was 60.0 MB. Max. memory is 16.1 GB. [2021-10-13 01:25:28,501 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory is still 80.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:25:28,501 INFO L168 Benchmark]: CACSL2BoogieTranslator took 480.39 ms. Allocated memory is still 104.9 MB. Free memory was 62.8 MB in the beginning and 71.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:25:28,502 INFO L168 Benchmark]: Boogie Preprocessor took 111.26 ms. Allocated memory is still 104.9 MB. Free memory was 71.3 MB in the beginning and 68.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:25:28,502 INFO L168 Benchmark]: RCFGBuilder took 796.11 ms. Allocated memory is still 104.9 MB. Free memory was 68.4 MB in the beginning and 40.1 MB in the end (delta: 28.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-13 01:25:28,503 INFO L168 Benchmark]: TraceAbstraction took 175556.01 ms. Allocated memory was 104.9 MB in the beginning and 201.3 MB in the end (delta: 96.5 MB). Free memory was 39.4 MB in the beginning and 101.8 MB in the end (delta: -62.4 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. [2021-10-13 01:25:28,503 INFO L168 Benchmark]: Witness Printer took 70.24 ms. Allocated memory is still 201.3 MB. Free memory was 101.8 MB in the beginning and 97.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:25:28,506 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 104.9 MB. Free memory is still 80.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 480.39 ms. Allocated memory is still 104.9 MB. Free memory was 62.8 MB in the beginning and 71.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 111.26 ms. Allocated memory is still 104.9 MB. Free memory was 71.3 MB in the beginning and 68.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 796.11 ms. Allocated memory is still 104.9 MB. Free memory was 68.4 MB in the beginning and 40.1 MB in the end (delta: 28.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 175556.01 ms. Allocated memory was 104.9 MB in the beginning and 201.3 MB in the end (delta: 96.5 MB). Free memory was 39.4 MB in the beginning and 101.8 MB in the end (delta: -62.4 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. * Witness Printer took 70.24 ms. Allocated memory is still 201.3 MB. Free memory was 101.8 MB in the beginning and 97.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L632] CALL, EXPR create_tree() [L585] struct node *nodelast = ((void *)0); [L586] struct node *node = ((void *)0); VAL [node={0:0}, nodelast={0:0}] [L587] COND TRUE __VERIFIER_nondet_int() [L588] node = malloc(sizeof *node) [L589] COND FALSE !(!node) VAL [node={-1:0}, nodelast={0:0}] [L591] node->left = ((void *)0) VAL [node={-1:0}, nodelast={0:0}] [L592] node->right = nodelast VAL [node={-1:0}, nodelast={0:0}] [L593] COND FALSE !(\read(*nodelast)) VAL [node={-1:0}, nodelast={0:0}] [L595] int value = __VERIFIER_nondet_int(); [L596] node->value = value VAL [node={-1:0}, nodelast={0:0}, value=0] [L597] nodelast = node VAL [node={-1:0}, nodelast={-1:0}, value=0] [L587] COND FALSE !(__VERIFIER_nondet_int()) [L599] COND TRUE node != ((void *)0) VAL [node={-1:0}, nodelast={-1:0}, value=0] [L600] node->parent = ((void *)0) VAL [node={-1:0}, nodelast={-1:0}, value=0] [L601] COND TRUE node != ((void *)0) [L602] node->left = malloc(sizeof *node) VAL [malloc(sizeof *node)={-2:0}, node={-1:0}, nodelast={-1:0}, value=0] [L603] COND FALSE !(!node) VAL [node={-1:0}, nodelast={-1:0}, value=0] [L605] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L605] node->left->left = ((void *)0) VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L606] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L606] node->left->right = ((void *)0) VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L607] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L607] node->left->value = 42 VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L608] EXPR node->left VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L608] node->left->parent = node VAL [node={-1:0}, node->left={-2:0}, nodelast={-1:0}, value=0] [L609] EXPR node->right VAL [node={-1:0}, node->right={0:0}, nodelast={-1:0}, value=0] [L609] node = node->right [L601] COND FALSE !(node != ((void *)0)) VAL [node={0:0}, nodelast={-1:0}, value=0] [L611] return nodelast; VAL [\result={-1:0}, node={0:0}, nodelast={-1:0}, value=0] [L632] RET, EXPR create_tree() VAL [create_tree()={-1:0}] [L632] struct node *data = create_tree(); [L633] COND FALSE !(!data) VAL [data={-1:0}] [L635] CALL inspect(data) VAL [node={-1:0}] [L575] COND FALSE !(!(node)) VAL [node={-1:0}, node={-1:0}] [L576] COND TRUE node != ((void *)0) VAL [node={-1:0}, node={-1:0}] [L577] node->left VAL [node={-1:0}, node={-1:0}, node->left={-2:0}] [L577] COND TRUE node->left [L578] EXPR node->left VAL [node={-1:0}, node={-1:0}, node->left={-2:0}] [L578] EXPR node->left->value VAL [node={-1:0}, node={-1:0}, node->left={-2:0}, node->left->value=42] [L578] COND FALSE !(!(node->left->value == 42)) [L579] EXPR node->value VAL [node={-1:0}, node={-1:0}, node->value=0] [L579] COND TRUE !(node->value) [L579] CALL fail() [L565] reach_error() - UnprovableResult [Line: 630]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed 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: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 578]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 173 locations, 65 error locations. Started 1 CEGAR loops. OverallTime: 175434.5ms, OverallIterations: 29, TraceHistogramMax: 3, EmptinessCheckTime: 48.7ms, AutomataDifference: 115479.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 38.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2484 SDtfs, 7028 SDslu, 5910 SDs, 0 SdLazy, 33249 SolverSat, 864 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 37443.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1141 GetRequests, 500 SyntacticMatches, 3 SemanticMatches, 638 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6004 ImplicationChecksByTransitivity, 109454.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=284occurred in iteration=26, InterpolantAutomatonStates: 408, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 285.5ms AutomataMinimizationTime, 28 MinimizatonAttempts, 1365 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 189.9ms SsaConstructionTime, 831.6ms SatisfiabilityAnalysisTime, 51484.4ms InterpolantComputationTime, 1501 NumberOfCodeBlocks, 1501 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 1403 ConstructedInterpolants, 169 QuantifiedInterpolants, 24583 SizeOfPredicates, 151 NumberOfNonLiveVariables, 2844 ConjunctsInSsa, 407 ConjunctsInUnsatCore, 39 InterpolantComputations, 17 PerfectInterpolantSequences, 81/152 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 01:25:28,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a0d2cf-44a9-4154-99a3-1127c1bab2d5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...