./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_del_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ --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 cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:14:32,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:14:32,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:14:32,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:14:32,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:14:32,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:14:32,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:14:32,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:14:32,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:14:32,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:14:32,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:14:32,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:14:32,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:14:32,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:14:32,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:14:32,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:14:32,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:14:32,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:14:32,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:14:32,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:14:32,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:14:32,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:14:32,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:14:32,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:14:33,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:14:33,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:14:33,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:14:33,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:14:33,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:14:33,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:14:33,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:14:33,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:14:33,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:14:33,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:14:33,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:14:33,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:14:33,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:14:33,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:14:33,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:14:33,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:14:33,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:14:33,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-10-17 10:14:33,072 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:14:33,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:14:33,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:14:33,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:14:33,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:14:33,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:14:33,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:14:33,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:14:33,075 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:14:33,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:14:33,076 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:14:33,076 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 10:14:33,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:14:33,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:14:33,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:14:33,077 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 10:14:33,077 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 10:14:33,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:14:33,077 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 10:14:33,077 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:14:33,077 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:14:33,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:14:33,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:14:33,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:14:33,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:14:33,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:14:33,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:14:33,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:14:33,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:14:33,103 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_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe [2022-10-17 10:14:33,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:14:33,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:14:33,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:14:33,397 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:14:33,398 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:14:33,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/verifythis/tree_del_iter.c [2022-10-17 10:14:33,469 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/data/8c2e095ed/d5a7e51d7dcf4354a39157833ed0e210/FLAGbd85c9e4a [2022-10-17 10:14:33,975 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:14:33,976 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/sv-benchmarks/c/verifythis/tree_del_iter.c [2022-10-17 10:14:33,984 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/data/8c2e095ed/d5a7e51d7dcf4354a39157833ed0e210/FLAGbd85c9e4a [2022-10-17 10:14:34,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/data/8c2e095ed/d5a7e51d7dcf4354a39157833ed0e210 [2022-10-17 10:14:34,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:14:34,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:14:34,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:14:34,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:14:34,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:14:34,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:14:34" (1/1) ... [2022-10-17 10:14:34,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6125e081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:34, skipping insertion in model container [2022-10-17 10:14:34,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:14:34" (1/1) ... [2022-10-17 10:14:34,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:14:34,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:14:34,619 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2022-10-17 10:14:34,644 WARN L1550 CHandler]: Possible shadowing of function min [2022-10-17 10:14:34,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:14:34,674 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-10-17 10:14:34,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@406eecc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:34, skipping insertion in model container [2022-10-17 10:14:34,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:14:34,675 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-10-17 10:14:34,678 INFO L158 Benchmark]: Toolchain (without parser) took 356.47ms. Allocated memory is still 88.1MB. Free memory was 63.3MB in the beginning and 62.8MB in the end (delta: 449.0kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-10-17 10:14:34,679 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 88.1MB. Free memory was 60.7MB in the beginning and 60.7MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:14:34,680 INFO L158 Benchmark]: CACSL2BoogieTranslator took 353.93ms. Allocated memory is still 88.1MB. Free memory was 63.1MB in the beginning and 62.8MB in the end (delta: 260.7kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-10-17 10:14:34,682 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 88.1MB. Free memory was 60.7MB in the beginning and 60.7MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 353.93ms. Allocated memory is still 88.1MB. Free memory was 63.1MB in the beginning and 62.8MB in the end (delta: 260.7kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ --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 cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:14:36,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:14:36,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:14:37,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:14:37,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:14:37,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:14:37,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:14:37,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:14:37,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:14:37,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:14:37,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:14:37,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:14:37,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:14:37,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:14:37,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:14:37,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:14:37,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:14:37,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:14:37,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:14:37,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:14:37,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:14:37,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:14:37,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:14:37,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:14:37,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:14:37,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:14:37,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:14:37,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:14:37,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:14:37,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:14:37,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:14:37,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:14:37,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:14:37,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:14:37,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:14:37,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:14:37,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:14:37,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:14:37,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:14:37,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:14:37,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:14:37,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-10-17 10:14:37,167 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:14:37,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:14:37,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:14:37,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:14:37,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:14:37,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:14:37,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:14:37,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:14:37,172 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:14:37,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:14:37,173 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:14:37,173 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 10:14:37,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:14:37,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:14:37,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:14:37,174 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 10:14:37,174 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 10:14:37,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:14:37,174 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 10:14:37,175 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 10:14:37,175 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 10:14:37,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:14:37,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:14:37,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:14:37,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:14:37,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:14:37,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:14:37,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:14:37,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:14:37,177 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-10-17 10:14:37,177 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 10:14:37,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 10:14:37,178 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe [2022-10-17 10:14:37,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:14:37,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:14:37,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:14:37,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:14:37,600 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:14:37,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/verifythis/tree_del_iter.c [2022-10-17 10:14:37,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/data/39851f6f5/99eb42ce69834fa999a1a24c6d472883/FLAG68b07c76d [2022-10-17 10:14:38,271 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:14:38,272 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/sv-benchmarks/c/verifythis/tree_del_iter.c [2022-10-17 10:14:38,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/data/39851f6f5/99eb42ce69834fa999a1a24c6d472883/FLAG68b07c76d [2022-10-17 10:14:38,616 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/data/39851f6f5/99eb42ce69834fa999a1a24c6d472883 [2022-10-17 10:14:38,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:14:38,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:14:38,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:14:38,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:14:38,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:14:38,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:14:38" (1/1) ... [2022-10-17 10:14:38,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366dc399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:38, skipping insertion in model container [2022-10-17 10:14:38,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:14:38" (1/1) ... [2022-10-17 10:14:38,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:14:38,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:14:38,846 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2022-10-17 10:14:38,867 WARN L1550 CHandler]: Possible shadowing of function min [2022-10-17 10:14:38,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:14:38,913 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-10-17 10:14:38,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:14:38,925 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2022-10-17 10:14:38,949 WARN L1550 CHandler]: Possible shadowing of function min [2022-10-17 10:14:39,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:14:39,016 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:14:39,034 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2022-10-17 10:14:39,064 WARN L1550 CHandler]: Possible shadowing of function min [2022-10-17 10:14:39,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:14:39,099 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:14:39,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39 WrapperNode [2022-10-17 10:14:39,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:14:39,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:14:39,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:14:39,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:14:39,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,158 INFO L138 Inliner]: procedures = 31, calls = 64, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2022-10-17 10:14:39,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:14:39,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:14:39,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:14:39,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:14:39,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,209 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:14:39,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:14:39,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:14:39,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:14:39,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (1/1) ... [2022-10-17 10:14:39,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:14:39,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:14:39,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:14:39,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:14:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:14:39,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-10-17 10:14:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:14:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:14:39,308 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-10-17 10:14:39,309 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-10-17 10:14:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-10-17 10:14:39,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-10-17 10:14:39,309 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-10-17 10:14:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:14:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-10-17 10:14:39,310 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-10-17 10:14:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:14:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-10-17 10:14:39,310 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-10-17 10:14:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:14:39,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:14:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:14:39,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:14:39,312 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-10-17 10:14:39,312 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-10-17 10:14:39,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:14:39,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-10-17 10:14:39,506 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:14:39,524 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:14:40,599 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:14:40,614 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:14:40,614 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 10:14:40,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:14:40 BoogieIcfgContainer [2022-10-17 10:14:40,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:14:40,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:14:40,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:14:40,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:14:40,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:14:38" (1/3) ... [2022-10-17 10:14:40,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f0cd16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:14:40, skipping insertion in model container [2022-10-17 10:14:40,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:14:39" (2/3) ... [2022-10-17 10:14:40,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f0cd16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:14:40, skipping insertion in model container [2022-10-17 10:14:40,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:14:40" (3/3) ... [2022-10-17 10:14:40,631 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2022-10-17 10:14:40,655 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:14:40,655 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2022-10-17 10:14:40,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:14:40,751 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@372a39c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:14:40,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-10-17 10:14:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 99 states have (on average 1.797979797979798) internal successors, (178), 163 states have internal predecessors, (178), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-10-17 10:14:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 10:14:40,762 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:14:40,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 10:14:40,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-10-17 10:14:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash 88048840, now seen corresponding path program 1 times [2022-10-17 10:14:40,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:14:40,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678073549] [2022-10-17 10:14:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:40,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:14:40,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:14:40,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:14:40,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 10:14:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:40,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:14:40,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:40,978 INFO L390 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 7 [2022-10-17 10:14:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:14:41,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:14:41,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:14:41,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678073549] [2022-10-17 10:14:41,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678073549] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:14:41,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:14:41,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:14:41,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417825625] [2022-10-17 10:14:41,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:14:41,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:14:41,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:14:41,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:14:41,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:14:41,063 INFO L87 Difference]: Start difference. First operand has 190 states, 99 states have (on average 1.797979797979798) internal successors, (178), 163 states have internal predecessors, (178), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:14:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:14:41,468 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2022-10-17 10:14:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:14:41,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-17 10:14:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:14:41,483 INFO L225 Difference]: With dead ends: 191 [2022-10-17 10:14:41,483 INFO L226 Difference]: Without dead ends: 188 [2022-10-17 10:14:41,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:14:41,489 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:14:41,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 350 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:14:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-10-17 10:14:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-10-17 10:14:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 97 states have (on average 1.731958762886598) internal successors, (168), 159 states have internal predecessors, (168), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-10-17 10:14:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2022-10-17 10:14:41,547 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 5 [2022-10-17 10:14:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:14:41,547 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2022-10-17 10:14:41,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:14:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2022-10-17 10:14:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 10:14:41,549 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:14:41,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 10:14:41,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:14:41,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:14:41,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-10-17 10:14:41,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:41,759 INFO L85 PathProgramCache]: Analyzing trace with hash 88048841, now seen corresponding path program 1 times [2022-10-17 10:14:41,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:14:41,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750889403] [2022-10-17 10:14:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:41,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:14:41,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:14:41,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:14:41,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 10:14:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:41,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:14:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:41,838 INFO L390 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 [2022-10-17 10:14:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:14:41,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:14:41,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:14:41,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750889403] [2022-10-17 10:14:41,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750889403] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:14:41,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:14:41,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:14:41,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996100649] [2022-10-17 10:14:41,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:14:41,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:14:41,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:14:41,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:14:41,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:14:41,855 INFO L87 Difference]: Start difference. First operand 186 states and 208 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:14:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:14:42,263 INFO L93 Difference]: Finished difference Result 185 states and 207 transitions. [2022-10-17 10:14:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:14:42,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-17 10:14:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:14:42,266 INFO L225 Difference]: With dead ends: 185 [2022-10-17 10:14:42,266 INFO L226 Difference]: Without dead ends: 185 [2022-10-17 10:14:42,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:14:42,268 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 2 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:14:42,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 353 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:14:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-10-17 10:14:42,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-10-17 10:14:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 97 states have (on average 1.7216494845360826) internal successors, (167), 158 states have internal predecessors, (167), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-10-17 10:14:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 207 transitions. [2022-10-17 10:14:42,303 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 207 transitions. Word has length 5 [2022-10-17 10:14:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:14:42,303 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 207 transitions. [2022-10-17 10:14:42,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:14:42,304 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 207 transitions. [2022-10-17 10:14:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:14:42,305 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:14:42,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:42,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-10-17 10:14:42,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:14:42,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-10-17 10:14:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash -163614216, now seen corresponding path program 1 times [2022-10-17 10:14:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:14:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003641131] [2022-10-17 10:14:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:42,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:14:42,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:14:42,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:14:42,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 10:14:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:42,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:14:42,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:14:42,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:14:42,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:14:42,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003641131] [2022-10-17 10:14:42,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003641131] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:14:42,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:14:42,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:14:42,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511978780] [2022-10-17 10:14:42,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:14:42,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:14:42,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:14:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:14:42,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:14:42,721 INFO L87 Difference]: Start difference. First operand 185 states and 207 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:14:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:14:42,942 INFO L93 Difference]: Finished difference Result 297 states and 335 transitions. [2022-10-17 10:14:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:14:42,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 10:14:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:14:42,946 INFO L225 Difference]: With dead ends: 297 [2022-10-17 10:14:42,947 INFO L226 Difference]: Without dead ends: 297 [2022-10-17 10:14:42,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:14:42,948 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 193 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:14:42,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1221 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:14:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-10-17 10:14:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 193. [2022-10-17 10:14:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 102 states have (on average 1.6862745098039216) internal successors, (172), 164 states have internal predecessors, (172), 21 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (24), 21 states have call predecessors, (24), 21 states have call successors, (24) [2022-10-17 10:14:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 217 transitions. [2022-10-17 10:14:42,970 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 217 transitions. Word has length 11 [2022-10-17 10:14:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:14:42,970 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 217 transitions. [2022-10-17 10:14:42,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:14:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 217 transitions. [2022-10-17 10:14:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:14:42,971 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:14:42,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:42,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:14:43,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:14:43,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-10-17 10:14:43,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:43,191 INFO L85 PathProgramCache]: Analyzing trace with hash -916126343, now seen corresponding path program 1 times [2022-10-17 10:14:43,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:14:43,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989325612] [2022-10-17 10:14:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:43,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:14:43,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:14:43,194 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:14:43,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-10-17 10:14:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:43,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:14:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:43,280 INFO L390 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 7 [2022-10-17 10:14:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:14:43,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:14:43,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:14:43,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989325612] [2022-10-17 10:14:43,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989325612] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:14:43,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:14:43,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:14:43,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372947674] [2022-10-17 10:14:43,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:14:43,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:14:43,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:14:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:14:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:14:43,320 INFO L87 Difference]: Start difference. First operand 193 states and 217 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:14:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:14:43,922 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2022-10-17 10:14:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:14:43,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 10:14:43,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:14:43,925 INFO L225 Difference]: With dead ends: 197 [2022-10-17 10:14:43,925 INFO L226 Difference]: Without dead ends: 197 [2022-10-17 10:14:43,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:14:43,926 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 64 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:14:43,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 309 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:14:43,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-10-17 10:14:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-10-17 10:14:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 104 states have (on average 1.6923076923076923) internal successors, (176), 164 states have internal predecessors, (176), 21 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) [2022-10-17 10:14:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 221 transitions. [2022-10-17 10:14:43,953 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 221 transitions. Word has length 11 [2022-10-17 10:14:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:14:43,958 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 221 transitions. [2022-10-17 10:14:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:14:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 221 transitions. [2022-10-17 10:14:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:14:43,960 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:14:43,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:43,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:14:44,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:14:44,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-10-17 10:14:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:44,173 INFO L85 PathProgramCache]: Analyzing trace with hash -916126342, now seen corresponding path program 1 times [2022-10-17 10:14:44,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:14:44,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011297510] [2022-10-17 10:14:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:44,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:14:44,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:14:44,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:14:44,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-10-17 10:14:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:14:44,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:44,254 INFO L390 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 [2022-10-17 10:14:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:14:44,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:14:44,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:14:44,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011297510] [2022-10-17 10:14:44,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011297510] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:14:44,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:14:44,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:14:44,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468170414] [2022-10-17 10:14:44,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:14:44,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:14:44,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:14:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:14:44,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:14:44,322 INFO L87 Difference]: Start difference. First operand 195 states and 221 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:14:44,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:14:44,921 INFO L93 Difference]: Finished difference Result 201 states and 231 transitions. [2022-10-17 10:14:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:14:44,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 10:14:44,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:14:44,924 INFO L225 Difference]: With dead ends: 201 [2022-10-17 10:14:44,924 INFO L226 Difference]: Without dead ends: 201 [2022-10-17 10:14:44,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:14:44,925 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 62 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:14:44,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 336 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:14:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-10-17 10:14:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2022-10-17 10:14:44,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 106 states have (on average 1.669811320754717) internal successors, (177), 166 states have internal predecessors, (177), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (26), 24 states have call predecessors, (26), 22 states have call successors, (26) [2022-10-17 10:14:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 225 transitions. [2022-10-17 10:14:44,943 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 225 transitions. Word has length 11 [2022-10-17 10:14:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:14:44,944 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 225 transitions. [2022-10-17 10:14:44,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:14:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 225 transitions. [2022-10-17 10:14:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 10:14:44,945 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:14:44,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:44,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-10-17 10:14:45,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:14:45,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-10-17 10:14:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:45,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1497511222, now seen corresponding path program 1 times [2022-10-17 10:14:45,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:14:45,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733433310] [2022-10-17 10:14:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:45,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:14:45,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:14:45,159 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:14:45,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-10-17 10:14:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:45,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:14:45,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:14:45,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:14:45,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:14:45,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733433310] [2022-10-17 10:14:45,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733433310] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:14:45,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:14:45,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:14:45,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439681987] [2022-10-17 10:14:45,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:14:45,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:14:45,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:14:45,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:14:45,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:14:45,349 INFO L87 Difference]: Start difference. First operand 198 states and 225 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:14:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:14:45,508 INFO L93 Difference]: Finished difference Result 306 states and 347 transitions. [2022-10-17 10:14:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:14:45,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-10-17 10:14:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:14:45,512 INFO L225 Difference]: With dead ends: 306 [2022-10-17 10:14:45,513 INFO L226 Difference]: Without dead ends: 306 [2022-10-17 10:14:45,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:14:45,514 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 192 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:14:45,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1220 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:14:45,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-10-17 10:14:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 244. [2022-10-17 10:14:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 145 states have (on average 1.696551724137931) internal successors, (246), 205 states have internal predecessors, (246), 28 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (32), 30 states have call predecessors, (32), 28 states have call successors, (32) [2022-10-17 10:14:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 306 transitions. [2022-10-17 10:14:45,528 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 306 transitions. Word has length 17 [2022-10-17 10:14:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:14:45,529 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 306 transitions. [2022-10-17 10:14:45,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:14:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 306 transitions. [2022-10-17 10:14:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:14:45,531 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:14:45,531 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:45,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:14:45,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:14:45,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-10-17 10:14:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:45,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2030552348, now seen corresponding path program 1 times [2022-10-17 10:14:45,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:14:45,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042123022] [2022-10-17 10:14:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:45,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:14:45,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:14:45,744 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:14:45,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-10-17 10:14:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:45,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:14:45,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:46,008 INFO L390 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 7 [2022-10-17 10:14:46,216 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 10:14:46,216 INFO L390 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 19 treesize of output 27 [2022-10-17 10:14:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:46,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:14:46,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:14:46,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042123022] [2022-10-17 10:14:46,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042123022] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:14:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1793713587] [2022-10-17 10:14:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:46,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 10:14:46,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/cvc4 [2022-10-17 10:14:46,435 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 10:14:46,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-10-17 10:14:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:14:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:46,712 INFO L390 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 7 [2022-10-17 10:14:48,814 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 10:14:48,815 INFO L390 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 14 treesize of output 20 [2022-10-17 10:14:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:14:48,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:14:48,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1793713587] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:14:48,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:14:48,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-10-17 10:14:48,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988713307] [2022-10-17 10:14:48,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:14:48,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:14:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:14:48,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:14:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=27, Unknown=1, NotChecked=0, Total=42 [2022-10-17 10:14:48,994 INFO L87 Difference]: Start difference. First operand 244 states and 306 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 10:14:55,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:14:55,635 INFO L93 Difference]: Finished difference Result 250 states and 314 transitions. [2022-10-17 10:14:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:14:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-10-17 10:14:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:14:55,638 INFO L225 Difference]: With dead ends: 250 [2022-10-17 10:14:55,638 INFO L226 Difference]: Without dead ends: 250 [2022-10-17 10:14:55,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26, Invalid=44, Unknown=2, NotChecked=0, Total=72 [2022-10-17 10:14:55,639 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 61 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:14:55,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 442 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 216 Invalid, 0 Unknown, 304 Unchecked, 0.5s Time] [2022-10-17 10:14:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-10-17 10:14:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2022-10-17 10:14:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 148 states have (on average 1.6891891891891893) internal successors, (250), 208 states have internal predecessors, (250), 28 states have call successors, (28), 8 states have call predecessors, (28), 10 states have return successors, (36), 31 states have call predecessors, (36), 28 states have call successors, (36) [2022-10-17 10:14:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 314 transitions. [2022-10-17 10:14:55,653 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 314 transitions. Word has length 29 [2022-10-17 10:14:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:14:55,654 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 314 transitions. [2022-10-17 10:14:55,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 10:14:55,654 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 314 transitions. [2022-10-17 10:14:55,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 10:14:55,656 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:14:55,656 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:14:55,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:14:55,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:14:56,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 [2022-10-17 10:14:56,062 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-10-17 10:14:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:14:56,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2020472179, now seen corresponding path program 1 times [2022-10-17 10:14:56,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-10-17 10:14:56,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351960072] [2022-10-17 10:14:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:14:56,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 10:14:56,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat [2022-10-17 10:14:56,066 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 10:14:56,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-10-17 10:14:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:14:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:14:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:14:56,353 INFO L390 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 [2022-10-17 10:14:56,361 INFO L390 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 7 [2022-10-17 10:15:00,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:15:00,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 10:15:00,691 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-10-17 10:15:00,692 INFO L390 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 13 treesize of output 13 [2022-10-17 10:15:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:15:00,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:15:03,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-10-17 10:15:03,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351960072] [2022-10-17 10:15:03,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351960072] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:15:03,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1499724514] [2022-10-17 10:15:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:15:03,136 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-10-17 10:15:03,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/cvc4 [2022-10-17 10:15:03,137 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-10-17 10:15:03,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ef4ad1-1d1c-4685-8189-6f3990efc5bd/bin/uautomizer-J5u9QxTXDZ/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-10-17 10:15:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:15:03,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:15:03,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:15:03,516 INFO L390 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 [2022-10-17 10:15:03,523 INFO L390 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 7 [2022-10-17 10:15:09,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:15:09,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 10:15:09,906 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-10-17 10:15:09,906 INFO L390 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 13 treesize of output 13 [2022-10-17 10:15:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 10:15:09,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:15:10,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1499724514] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:15:10,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:15:10,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-10-17 10:15:10,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563709561] [2022-10-17 10:15:10,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:15:10,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:15:10,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-10-17 10:15:10,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:15:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2022-10-17 10:15:10,121 INFO L87 Difference]: Start difference. First operand 248 states and 314 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 10:15:10,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:15:10,941 INFO L93 Difference]: Finished difference Result 267 states and 346 transitions. [2022-10-17 10:15:10,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:15:10,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-10-17 10:15:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:15:10,944 INFO L225 Difference]: With dead ends: 267 [2022-10-17 10:15:10,944 INFO L226 Difference]: Without dead ends: 267 [2022-10-17 10:15:10,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=27, Invalid=62, Unknown=1, NotChecked=0, Total=90 [2022-10-17 10:15:10,946 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 129 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 10:15:10,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 414 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 220 Invalid, 0 Unknown, 160 Unchecked, 0.7s Time] [2022-10-17 10:15:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-10-17 10:15:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2022-10-17 10:15:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 159 states have (on average 1.6415094339622642) internal successors, (261), 220 states have internal predecessors, (261), 31 states have call successors, (31), 9 states have call predecessors, (31), 12 states have return successors, (45), 34 states have call predecessors, (45), 31 states have call successors, (45) [2022-10-17 10:15:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 337 transitions. [2022-10-17 10:15:10,961 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 337 transitions. Word has length 35 [2022-10-17 10:15:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:15:10,962 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 337 transitions. [2022-10-17 10:15:10,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 10:15:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 337 transitions. [2022-10-17 10:15:10,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:15:10,964 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:15:10,964 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]